Field of the Invention

[0001] The present disclosure generally relates to an air delivery system for a plant grow rack.

Background Art

[0002] Plant grow rack systems generally consist of one or multiple levels of horizontal grow racks within a framework. Oftentimes, the horizontal grow racks of such multi-level grow rack systems are stacked vertically. Each rack is used to grow and harvest one or more plants. Plant grow rack systems lack sufficient air distribution — whether ambient air, cooled air, and/or heated air — across the growing rack.

Summary of the Invention

[0003] An air delivery apparatus constructed to distribute air across a plant grow rack includes an inlet; a chamber connected to the inlet; a channel connected to the chamber, the channel including a bottom wall; a plurality of channel vents disposed in the bottom wall; and a flow diverter constructed to direct air in the chamber toward a channel; wherein the channel vents are constructed to receive air within the channel and direct the air down toward plants or seeds disposed on or within one or more trays of the plant grow rack.

Brief Description of the Drawings

[0004] The present disclosure will be more readily understood from a detailed description of some example embodiments taken in conjunction with the following figures:

[0005] FIG. 1 depicts a top isometric view of an air delivery apparatus.

[0006] FIG. 2 depicts an isometric end view of the air delivery apparatus of FIG. 1 , wherein the outer housing of the main chamber has been shown in transparent to illustrate components inside the main chamber.

[0007] FIG. 3 depicts a bottom isometric view of the air delivery apparatus of FIG. 1.

[0008] FIG. 4 depicts a distal end view of the air delivery apparatus of FIG. 1. [0009] FIG. 5 depicts a top isometric view of another embodiment of an air delivery apparatus.

[0010] FIG. 6 depicts a bottom view of the air delivery apparatus of FIG. 5.

[0011] FIG. 7 depicts a bottom isometric view of a channel cover of the air delivery apparatus of FIG. 5.

[0012] FIG. 8 depicts an isometric view of a vent louver of the air delivery apparatus of FIG. 5

[0013] FIG. 9 depicts a top isometric view of a plant grow rack including the air delivery apparatus of FIG. 1.

[0014] FIG. 10 depicts a side elevational view of the plant grow rack of FIG. 9.

[0015] FIG. 11 depicts a bottom isometric view of the plant grow rack of FIG. 9.

[0016] FIG. 12 depicts an end view of the plant grow rack of FIG. 9.

[0017] FIG. 13 depicts a top isometric view of an air discharge fitting of one or more of the air delivery apparatuses shown and described herein.

[0018] FIG. 14 depicts a side elevational view of the air discharge fitting of FIG. 13.

[0019] FIG. 15 depicts a cross sectional view of the air discharge fitting taken along line

15-15 ofFIG. 14.

[0020] FIG. 16 depicts a top isometric view of an end extension of one or more of the air delivery apparatuses shown and described herein.

[0021] FIG. 17 depicts an end view of the end extension ofFIG. 16.

[0022] FIG. 18 depicts a top, partial isometric view of another embodiment of an air delivery apparatus with an end extension fully extended.

[0023] FIG. 19 depicts a top, partial isometric view of the air delivery apparatus of FIG.

18 with the end extension fully inserted within the channels.

[0024] FIG. 20 depicts a top isometric view of another embodiment of an air delivery apparatus. [0025] FIG. 21 depicts an isometric end view of the air delivery apparatus of FIG. 20.

[0026] FIG. 22 depicts a side elevational view of an end of the air delivery apparatus of

FIG. 20.

[0027] FIG. 23 depicts an isometric end view of the air delivery apparatus of FIG. 20 wherein the outer housing of the main chamber has been removed to illustrate components inside the main chamber.

[0028] FIG. 24 depicts a top view of the air delivery apparatus of FIG. 20 wherein the outer housing of the main chamber has been removed to illustrate components inside the main chamber.

[0029] FIG. 25 depicts an exploded isometric view of a main chamber of the air delivery apparatus of FIG. 20.

[0030] FIG. 26A depicts a side elevational view of the main chamber of FIG. 25.

[0031] FIG. 26B depicts a side elevation view of the main chamber of FIG. 25, wherein the outer housing of the main chamber has been shown in transparent to illustrate components inside the main chamber.

[0032] FIG. 27A depicts a top-down schematic view illustrating a flow path through a main chamber having an asymmetrical pair of structural flow diverters.

[0033] FIG. 27B depicts a top-down schematic view illustrating a flow path through a main chamber having a symmetrical pair of structural flow diverters.

[0034] FIG. 27C depicts a top-down schematic view illustrating a flow path through another embodiment of a main chamber having an asymmetrical pair of structural flow diverters.

[0035] FIG. 27D depicts a top-down schematic view illustrating a flow path through another embodiment of main chamber having a symmetrical pair of structural flow diverters.

[0036] FIG. 27E depicts a top-down schematic view illustrating a flow path through a main chamber having a pair of V-shaped structural flow diverters.

[0037] FIG. 27F depicts a top down schematic view illustrating a flow path through another embodiment of a main chamber having a pair of V-shaped structural flow diverters. [0038] FIG. 27G depicts a top down schematic view illustrating a flow path through a manifold-style main chamber.

[0039] FIG. 27H depicts a top down schematic view illustrating a flow path through the main chamber of FIG. 25 with structural inserts.

[0040] FIG. 28A depicts a front isometric view of a structural flow diverter of the air delivery apparatus of FIG. 20.

[0041] FIG. 28B depicts a side elevational view of the structural flow diverter of FIG. 28A.

[0042] FIG. 28C depicts a rear isometric view of the structural flow diverter of FIG. 28 A.

Detailed Description

[0043] Various non-limiting embodiments of the present disclosure will now be described to provide an overall understanding of the principles of the structure, function, and use of the apparatuses, systems, methods, and processes disclosed herein. One or more examples of these non-limiting embodiments are illustrated in the accompanying drawings. Those of ordinary skill in the art will understand that systems and methods specifically described herein and illustrated in the accompanying drawings are non-limiting embodiments. The features illustrated or described in connection with one non-limiting embodiment may be combined with the features of other nonlimiting embodiments. Such modifications and variations are intended to be included within the scope of the present disclosure.

[0044] Reference throughout the specification to "various embodiments," "some embodiments," "one embodiment," "some example embodiments," "one example embodiment," or "an embodiment" means that a particular feature, structure, or characteristic described in connection with any embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in one embodiment," "some example embodiments," "one example embodiment, or "in an embodiment" in places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

[0045] The examples discussed herein are examples only and are provided to assist in the explanation of the apparatuses, devices, systems and methods described herein. None of the features or components shown in the drawings or discussed below should be taken as mandatory for any specific implementation of any of these the apparatuses, devices, systems or methods unless specifically designated as mandatory. For ease of reading and clarity, certain components, modules, or methods may be described solely in connection with a specific figure. Any failure to specifically describe a combination or sub-combination of components should not be understood as an indication that any combination or sub-combination is not possible. Also, for any methods described, regardless of whether the method is described in conjunction with a flow diagram, it should be understood that unless otherwise specified or required by context, any explicit or implicit ordering of steps performed in the execution of a method does not imply that those steps must be performed in the order presented but instead may be performed in a different order or in parallel.

[0046] A plant grow rack may generally consist of one or multiple levels of horizontal grow racks within a framework (see, e.g., FIGS. 9-12). In the embodiments with multiple levels of horizontal grow racks, the horizontal grow racks are spaced apart in a stacked vertical arrangement. Each rack is used to grow and harvest one or more plants. Each rack level may have its own light source(s) such as, for example, one or more overhead lights for each rack level.

[0047] Plant grow rack systems lack sufficient air distribution — whether ambient air, cooled air, and/or heated air — across the growing rack. The air delivery apparatuses and/or systems shown and described herein may improve the distribution air across one or more levels of the rack system.

[0048] Described herein are example embodiments of air delivery apparatus useful for distribution of fluid (e.g., ambient air, cooled air, heated air) across a plant grow rack apparatus such as, for example, a heating, ventilating, and air conditioning (“HVAC”) system. An example embodiment includes a vertical air delivery apparatus, wherein the fluid (e.g., air) is distributed horizontally from the source (e.g., fan) to one or more outlets distributed over and across a plant grow rack (e.g., one or more trays of the plant grow rack) and then exit the fluid vertically or downward toward, adjacent to, and/or onto one or more plants or seeds disposed on or within one or more trays of the plant grow rack.

[0049] Referring to FIGS. 1-4, an embodiment of an air delivery apparatus 10 is illustrated and will now be described. Air delivery apparatus 10 includes a main chamber 12 (e.g., a plenum, a manifold, etc.). Main chamber 12 may be formed by one or more walls 14 and include a chamber inlet 16 and a chamber outlet 18. In the embodiment shown, outlet 18 includes a first chamber outlet 18a and a second chamber outlet 18b. Main chamber 12 may be constructed to have any shape, size, or configuration. In some embodiments, main chamber 12 may be the connection between the inlet and one or more channels connected to the main chamber 12.

[0050] Main chamber 12 is constructed to receive a fluid (e.g., air) through chamber inlet 16 and then allow the fluid to flow to and exit from one or more chamber outlets 18a, 18b. In some embodiments, one or more flow diverters 20 may be included within main chamber 12 to assist in directing the fluid from chamber inlet 16 to chamber outlets 18a, 18b and/or to create turbulence within air delivery apparatus 10 such as, for example, main chamber 12. Examples of a flow diverter may include, for example, a baffle, vane, fin, air deflector, partition, or other structure capable of some or all of directing airflow, modifying airflow, introducing turbulence into airflow, smoothing airflow, or otherwise influencing the characteristics of airflow. In some embodiments, flow diverters 20 not only assist in directing the fluid from chamber inlet 16 to chamber outlets 18a, 18b and/or to create turbulence, but provide support to the apparatus, particularly main chamber 12. In some embodiments, flow diverters 20 provide vertical support between a top wall 22 and a bottom wall 24 of main chamber 12. It is understood that some embodiments of main chamber 12 may include any number of chamber inlets, chamber outlets, and/or flow diverters.

[0051] In some embodiments, the air delivery apparatus may include one or more channels extending from main chamber 12. These channels may be permanently or detachably connectable to the main chamber at respective main chamber outlets. As shown in FIGS. 1-2, air delivery apparatus 10 includes a first channel 30a and a second channel 30b detachably connected to respective first and second chamber outlets 18a, 18b. Examples of a channel may include, for example, a pipe, duct, tube, conduit, hose, or other structure capable of some or all of receiving airflow, directing airflow, or otherwise influencing the characteristics of airflow.

[0052] In some embodiments, the air delivery apparatus may include one or more support members to connect or support the channels and/or the main chamber. Referring to FIGS. 1-2, air delivery apparatus 10 includes a support member 44 connecting first channel 30a to second channel 30b. Channels 30a, 30b include respective proximal ends 32a, 32b and distal ends 34a, 34b. At the proximal ends 32a, 32b, respective channels 30a, 30b include respective channel inlets 36a, 36b. At the distal ends 34a, 34b, respective channels 30a, 30b include respective channel vents 38. In addition, some embodiments of the air delivery apparatus may include an end bracket. As shown, air delivery apparatus 10 includes an end bracket 40 connected to respective distal ends 34a, 34b of first and second channels 30a, 30b. In some embodiments, end bracket 40 closes off channel vents 38 at the respective distal ends 34a, 34b, preventing some, substantially all, or all of the fluid within the channels from flowing out the respective distal ends 34a, 34b. In some embodiments, end bracket 40 includes respective caps 42a, 42b that close off the channel vents 38 of respective distal ends 34a, 34b, preventing some, substantially all, or all of the fluid within the channels from flowing out the respective distal ends 34a, 34b. As used, herein, “substantially all” means that the ends prevent a majority of the fluid from exiting channel vents 38, but are not completely sealed off and thus may allow some fluid to leak or escape through channel vents 38 and/or seams between walls of channels 30a, 30b and end bracket 40. Distal ends 34a, 34b and/or end bracket 40 may be constructed to fully seal off respective channels 30a, 30b.

[0053] Channels 30a, 30b may include respective bottom walls 37a, 37b that include one or more channel vents 38 distributed across each bottom wall 37a, 37b. Channel vents 38 may be distributed in a random or designed pattern across bottom walls 37a, 37b. Channel vents 38 may have the same size or varied size across bottom walls 37a, 37b. Referring to FIGS. 2-3, channel vents 38 have a circular cross section or shape.

[0054] Air delivery apparatus 10 may include an air discharge fitting 50 detachably connected to and/or disposed in each channel vent 38. Examples of an air discharge fitting may include, for example, a nozzle, grommet, valve, aperture, spout, or other structure capable of some or all of receiving airflow, directing airflow, or otherwise influencing the characteristics of airflow. In some implementations, air discharge fittings 50 may be coupled to and removed from channel vents 38 (e.g., by a friction fit, adhesive, screw fit, or other coupling) such that they are removable and replaceable. In some implementations, air discharge fittings 50 may be permanently affixed within a channel vent 38 (e.g., by a weld joint, or where the air discharge fittings 50 are constructed from the same material and as part of the same piece as the channels 30a, 30b). Air discharge fitting 50 may be constructed with a cannula, thus having an air discharge fitting inlet 52 and air discharge fitting outlet 54 as shown, for example, in FIGS 13-15. Air discharge fitting 50 may include a flange 56 about and/or adjacent to air discharge fitting inlet 52, forming an output channel 57 having an inner surface 58. It is understood that air discharge fitting outlet 54 may include a flange (not shown) about and/or adjacent to it as well. The air discharge fitting 50 may be configured to redirect a portion of airflow passing near or above the inlet 52 (e.g., through the first channel 30a) downwards through the output channel 57 and towards the canopy of plants positioned below the air discharge fitting 50. The structure of air discharge fitting 50 may be varied to direct airflow in a desired direction or influence the volume or velocity of airflow, for example. Similarly, the position and arrangement of the air discharge fitting 50 may be varied to direct airflow or influence airflow characteristics, such as be positioning the air discharge fitting 50 at an angle relative to the direction of nearby airflow, or positioning the air discharge fitting 50 at an angle to direct outgoing airflow in a certain direction.

[0055] In some embodiments, air discharge fitting 50 may include a first outer diameter (a) from 0.5 inches to 2.5 inches, e.g., 1.27 inches, and a first inner diameter (c) from 0.05 inches to 2.5 inches, e.g., 0.82 inches. Air discharge fitting 50 may include a second outer diameter (j) from 0.05 inches to 2.5 inches, and a second inner diameter (i) from 0.05 inches to 2.5 inches, e.g., 0.75 inches. Air discharge fitting 50 may have a length (b) from 0.1 inches to 2.0 inches, e.g., 0.74 inches. Flange 56 may have a height (d) from 0.1 inches to 0.25 inches, e.g., 0.14 inches. Air discharge fitting 50 may have a second length (e) (e.g., from an outlet end of the air discharge fitting to an underside of flange 56) from 0.01 inches to 1.5 inches, e.g., 0.6 inches as shown in FIG. 15. Air discharge fitting 50 may include a third length (g) (e.g., from the outlet end of the air discharge fitting to a vertex 59 along inner surface 58) from 0.01 inches to 1.5 inches, e.g., 0.28 inches. Air discharge fitting 50 may include a fourth length (f) (e.g., from vertex 59 to an inlet end of air discharge fitting 50) from 0.01 inches to 1.5 inches, e.g., 0.46 inches. Inner surface 58 may define an angle (h) of 160° about vertex 59. Although it is understood that other angles are contemplated, including no angle (i.e., (h) equals 0°) or radius of curvature, e.g., a curved or rounded vertex.

[0056] Illustrative air discharge fittings may be fabricated from any variety of materials, including but not limited to plastics, elastomers, composites, or any deformable and/or resilient material. In some embodiments, air discharge fitting 50 may be fabricated from rubber neoprene. In some embodiments, air discharge fitting 50 is installed, removed, and capable of being reinstalled one or more times, for example, by a user. In some embodiments, the air discharge fittings are permanently attached. Air discharge fitting 20 may be constructed to have any shape, size, or configuration. In some embodiments, the number of channel vents 38, spacing between each channel vent 38, and geometry of air discharge fitting 50 may be controlled and configured to maximize and/or more evenly distribute the downward or vertical fluid flow from air delivery apparatus 10 across a plant grow rack positioned below air delivery apparatus 10.

[0057] Referring back to FIGS. 1-12, air delivery apparatus 10 may include any number of channel vents 38 such as, for example, any number from 5 channel vents to 200 channel vents per 8 linear feet of channel. In some embodiments, air delivery apparatus 10 may include 50 channel vents 38 per linear feet of channel. In some embodiments, air delivery apparatus 10 may include 60 channel vents 38 per linear feet of channel. In some embodiments, air delivery apparatus 10 may include 70 channel vents 38 per linear feet of channel. In some embodiments, air delivery apparatus 10 may include 80 channel vents 38 per linear feet of channel. In some embodiments, air delivery apparatus 10 may include 90 channel vents 38 per linear feet of channel. In some embodiments, air delivery apparatus 10 may include 100 channel vents 38 per linear feet of channel. In some embodiments, air delivery apparatus 10 may include 110 channel vents 38 per linear feet of channel. In some embodiments, air delivery apparatus 10 may include 120 channel vents 38 per linear feet of channel. In some embodiments, air delivery apparatus 10 may include 130 channel vents 38 per linear feet of channel. In some embodiments, air delivery apparatus 10 may include 140 channel vents 38 per linear feet of channel. In some embodiments, air delivery apparatus 10 may include 150 channel vents 38 per linear feet of channel.

[0058] In some embodiments, channel vents 38 have a diameter from 0.01 inches to 2.0 inches, in another embodiment from 0.05 inches to 1.5 inches, in another embodiment from 0.7 inches to 1.1 inches, in another embodiment from 0.85 inches to 1.0 inches, or in another embodiment from 0.9 inches to 0.95 inches. In one embodiment, channel vents 38 have a diameter of 0.925 inches. In some embodiments, air discharge fitting outlets 54 have a diameter from 0.01 inches to 2.0 inches, in another embodiment from 0.05 inches to 1.5 inches, in another embodiment from 0.7 inches to 1.1 inches, in another embodiment from 0.85 inches to 1.0 inches, or in another embodiment from 0.9 inches to 0.95 inches. In one embodiment, air discharge fitting outlets 54 have a diameter of 0.925 inches. It is understood that channel vents 38, air discharge fitting 50, air discharge fitting inlet 52 and air discharge fitting outlet 54 can be any shape or size. In some embodiments, channel vents 38 may be one or more slots or slits disposed along one or more of bottom walls 37a, 37b and have any desired length or variety of lengths. In some embodiments, air discharge fittings 50 may be shaped to fit within such slots or slits.

[0059] In some embodiments, channel vents 38 are positioned from 1 inch apart (end to end) to 15 inches apart (end to end), in another embodiment from 4 inches apart (end to end) to 12 inches apart (end to end), in another embodiment from 6 inches apart (end to end) to 10 inches apart (end to end), in another embodiment from 7 inches apart (end to end) to 8 inches apart (end to end). In one embodiment, channel vents 38 are positioned 7.25 inches apart (end to end).

[0060] In some embodiments, channel vents 38 are positioned from 1 inch apart (side to side) to 15 inches apart (side to side), in another embodiment from 4 inches apart (side to side) to 12 inches apart (side to side), in another embodiment from 6 inches apart (side to side) to 10 inches apart (side to side), in another embodiment from 7 inches apart (side to side) to 8 inches apart (side to side). In one embodiment, channel vents 38 are positioned 7.0 inches apart (side to side).

[0061] Air delivery apparatus 10 (e.g., channels 30a, 30b, and main chamber 12) may be constructed to have any configuration, shape or size (e.g., length, height, depth, diameter, and/or volume) such as for example, rectangular cross sectional shapes, circular cross sectional shapes, or other cross sectional shapes. In the embodiment shown, air delivery apparatus 10 is 4 feet wide by 8 feet long. In some embodiments, the air delivery apparatus may be 4 feet wide by 4 feet long.

[0062] Air delivery apparatus 10 and/or channels 30a, 30b may be constructed to be permanently or detachably connected to another discrete set of one or more channels to enable extending the channels 30a, 30b to any desired length. For example, distal ends of channels 30a, 30b or end bracket 40 may be constructed to be detachably connected to proximal ends of another discrete section of channels. Additional discrete sections of channels may be added to the distal ends of the preceding section of channels such that the air delivery apparatus can be extended to span the entire length of a plant growing rack or growing space (e.g., an interior space of a growing facility). These additional discrete sections of channels may comprise any length. In some embodiments, these sections are 4 feet in length; in other embodiments these sections are 8 feet in length. The lengths of the connected sections of channels may be varied. For example, in some embodiments, air delivery apparatus 10 may be 8 foot in length and then a 4 foot additional channel section may be added to the distal end of the channels of air delivery apparatus 10 to extend its length from 8 foot to 12 feet.

[0063] As discussed, any number of discrete sections of channels may be connected to each other to form a series of channels extending over any desired distance. The additional sections of channels and/or air delivery apparatuses may be, in some embodiments, connected to extend the air delivery apparatus up to 200 feet, in another embodiment up to 150 feet, in another embodiment up to 100 feet, in another embodiment up to 90 feet, in another embodiment up to 80 feet, in another embodiment up to 70 feet, in another embodiment up to 60 feet, or in another embodiment up to 50 feet. In some embodiments, air delivery apparatus 10 may be extended to a length of 60 feet and be 4 feet wide.

[0064] In some embodiments, air delivery apparatus 10 may include a blower, e.g., a fan, (not shown) connected to it (e g., main chamber inlet 16) to force or draw fluid (e.g., air) into air delivery apparatus 10, more particularly into and out of main chamber 12 and through channels 30a, 30b and out of channel vents 38 and/or air discharge fitting outlets 54. In some embodiments, a 6 inch fan is connected to and/or a part of air delivery apparatus 10. In some embodiments, an 8 inch fan is connected to and/or a part of air delivery apparatus 10. In some embodiments, a 10 inch fan is connected to and/or a part of air delivery apparatus 10. In some embodiments, a 12 inch fan is connected to and/or a part of air delivery apparatus 10. In some embodiments, a 14 inch fan is connected to and/or a part of air delivery apparatus 10. It is understood that other types, numbers, and sizes of fans may be connected to and/or a part of air delivery apparatus 10, depending upon the airflow requirements. The fan may be connected to A/C power or DC power to provide power to the motor that drives the fan.

[0065] In some embodiments, when air delivery apparatus 10 ranges from about 1 foot in length to about 15 feet to 25 feet in length a 6 inch fan is generally connected to air delivery apparatus 10. In some embodiments, when air delivery apparatus 10 ranges from about 1 foot in length to about 15 feet to 25 feet in length a 10 inch fan is generally connected to air delivery apparatus 10. In some embodiments, when air delivery apparatus 10 ranges from about 15 feet to 25 feet in length to about 40 feet to 60 feet in length an 8 inch fan is generally connected to air delivery apparatus 10. In some embodiments, when air delivery apparatus 10 ranges from about 15 feet to 25 feet in length to about 40 feet to 60 feet in length an 12 inch fan is generally connected to air delivery apparatus 10. In some embodiments, when air delivery apparatus 10 ranges from 40 feet to 60 feet in length a 10 inch fan is generally connected to air delivery apparatus 10. In some embodiments, when air delivery apparatus 10 ranges from 40 feet to 60 feet in length a 14 inch fan is generally connected to air delivery apparatus 10. It should be understood that air delivery apparatus 10 may be expanded in width by adding additional channels extending from main chamber 12 and/or expanding main chamber 12 to accommodate additional these additional channels. In some embodiments, channels 30a, 30b may extend from main chamber 12 parallel to one another as shown. In some embodiments, channels 30a, 30b may extend in nonparallel and/or random directions from the main chamber.

[0066] In operation, some embodiments use the fan to force or draw fluid (e.g., air) into main chamber 12. At least a portion of this fluid in main chamber 12 is forced against one or more flow diverters 20 which may create turbulence in the fluid and direct the fluid towards and/or through main chamber outlets 18a, 18b and then into channel inlets 36a, 36b. The fluid (e.g., air) may flow and/or distribute through channels 30a, 30b. As described above, channel vents 38 and associated (e.g., inserted) air discharge fittings 50 may be constructed to permit and/or direct the fluid through and/or out of the channel vents 38 (e.g., into air discharge fitting inlets 52 and out of air discharge fitting outlets 54) downward toward plants disposed on and/or within one or more trays of a plant grow rack and the horizontal members supporting the one or more trays.

[0067] In another embodiment, main chamber 12 and channels 30a, 30b may be constructed of PVC piping and channel vents 38 drilled or cut into a bottom side of the PVC pipe. PVC elbows, tee joints, and other joints may be included to construct the desired size, shape and configuration of the air delivery apparatus. Although not exhaustive, this is one example where the air delivery apparatus may not include a main chamber. Or, rather than a main chamber, the air delivery apparatus may include one or more lateral pipes (or channels) that extend in a first direction from the inlet. In addition, the air delivery apparatus may include one or more longitudinal pipes that extend from the one or more lateral pipes in parallel or nonparallel directions relative to each other.

[0068] Referring to FIGS. 5-8, another embodiment of an air delivery apparatus 100 is shown. In this embodiment, all components are the same or similar to the embodiments shown and described herein. In this example embodiment, air delivery apparatus 100 includes channel vents 138 disposed within channel bottom walls 137a, 137b that are rectangular in shape. Air discharge fittings and a support member are not included in this embodiment; although they could be if desired.

[0069] As shown, for example, air delivery apparatus 100 may include a main chamber 112 and first and second channels 130a, 130b connected to respective outlets (not shown) of main chamber 112. Air delivery apparatus 100 may also include an end bracket 144 connected to respective distal ends 134a, 134b of first and second channels 130a, 130b. In addition, vent louvers 160 may be included and connected to bottom walls 137a, 137b at one or more of channel vents 138 such that vent louvers 160 are positioned partially, substantially, or completely over channel vents 138 to direct the flow of fluid exiting channel vents 138. Vent louvers 160 maybe detachably or permanently attached to bottom walls 137a, 137b and/or channel vents 138. As shown, each row of vent louvers 160 direct the flow of fluid in alternate directions. It is understood that the louvers can be directed in a variety of angles and/or directions, including each row being directed in the same direction.

[0070] In some embodiment, a kit for a plant grow rack may include an air delivery apparatus constructed to distribute air across a plant grow rack, a horizontal tray constructed to receive a plurality plants; and a plurality of vertical supports constructed to connect to the tray and support the tray in a horizontal orientation. The air delivery apparatus may comprise any of the illustrative air delivery apparatuses described herein. In some embodiment, the air delivery apparatus of the kit, may include an inlet, a chamber connected to the inlet, a channel connected to the chamber, the channel including a bottom wall, a plurality of channel vents disposed in the bottom wall, and a flow diverter constructed to direct air in the chamber toward a channel, wherein the channel vents are constructed to receive air within the channel and direct the air down toward the plant grow rack.

[0071] The kit, in some embodiments, may include a fan connectable to the inlet of the air delivery apparatus. In some embodiments, the kit may also include a plurality of air discharge fittings, each air discharge fitting disposed in a respective one of the plurality of channel vents. In some embodiments, the kit may include a plurality of vent louvers connected to the channel, each one of the plurality of vent louvers connected at a respective one of the plurality of channel vents. In some embodiments, the kit may include a plurality of trays, instead of just one tray, wherein each tray of the plurality of trays is connectable to and spaced apart from another one of the plurality of trays. In some embodiments, the kit may include a plurality of trays, instead of just one tray, wherein some of the plurality of vertical supports are connectable between a first one of the plurality of trays and a second one of the plurality of trays.

[0072] Referring to FIGS. 9-12, an illustrative plant grow rack apparatus is shown as 200. Plant grow rack apparatus 200 may include a plurality of vertical supports, for example, four vertical supports 230. Plant grow rack apparatus 200 may include one or more levels. For example, rack apparatus 200 may include a first level that may include a pair of longitudinal horizontal members 210 spaced apart from and substantially parallel to each other. The first level may also include a pair of latitudinal horizontal members 250 spaced apart from and substantially parallel to each other. The pair of longitudinal horizontal members 210 and the pair of latitudinal horizontal members 250 may be connected to each other and/or to one or more of the vertical supports 230. The first level may include one or more additional latitudinal horizontal members 220 spaced apart and between the pair of latitudinal horizontal members 250.

[0073] A first plant grow tray (not shown) may be positioned upon the one or more latitudinal horizontal members 220, pair of latitudinal horizontal members 250, and/or pair of longitudinal horizontal members 210. The plant grow tray may be any conventional plant grow tray constructed to hold plant growing material, for example, soil, and enable one or more plants to be held upon and grow. In one example, the plant grow tray may be rectangular in shape and have a depth constructed to hold some plant growing material.

[0074] Plant grow rack apparatus 200 may include additional levels that are the same or substantially the same as the first level described above. For example, as shown in FIGS. 9-12, plant grow rack apparatus 200 may include a second level that may include a pair of longitudinal horizontal members 310 spaced apart from and substantially parallel to each other. The second level may also include a pair of latitudinal horizontal members 350 spaced apart from and substantially parallel to each other. The pair of longitudinal horizontal members 310 and the pair of latitudinal horizontal members 350 may be connected to each other and/or to one or more of the vertical supports 330. The second level may include one or more additional latitudinal horizontal members 320 spaced apart and between the pair of latitudinal horizontal members 350. [0075] A second plant grow tray (not shown) may be positioned upon the one or more latitudinal horizontal members 320, pair of latitudinal horizontal members 350, and/or pair of longitudinal horizontal members 310. The second plant grow tray may be identical or similar to the first plant grow tray.

[0076] As shown in the figures, a first air delivery apparatus 10 is shown connected to an underside of one or more of the pair of latitudinal horizontal members 350 and/or the one or more additional latitudinal horizontal members 320. Fig. 10 illustrates that the first air delivery apparatus is disposed along the latitudinal horizontal members 350, 320 such that channel vents 38 may direct air onto one or more plants and/or a first plant grow rack (not shown) that may be positioned upon the one or more latitudinal horizontal members 220, pair of latitudinal horizontal members 250, and/or pair of longitudinal horizontal members 210.

[0077] Plant grow rack apparatus 200 may include a third level that may include a pair of longitudinal horizontal members 410 spaced apart from and substantially parallel to each other. The third level may also include a pair of latitudinal horizontal members 450 spaced apart from and substantially parallel to each other. The pair of longitudinal horizontal members 410 and the pair of latitudinal horizontal members 450 may be connected to each other and/or to one or more of the vertical supports 430. The third level may include one or more additional latitudinal horizontal members 420 spaced apart and between the pair of latitudinal horizontal members 450.

[0078] A third plant grow tray (not shown) may be positioned upon the one or more latitudinal horizontal members 420, pair of latitudinal horizontal members 450, and/or pair of longitudinal horizontal members 410. The third plant grow tray may be identical or similar to the first plant grow tray.

[0079] As shown in the figures, a second air delivery apparatus 10 is shown connected to an underside of one or more of the pair of latitudinal horizontal members 450 and/or the one or more additional latitudinal horizontal members 420. Fig. 10 illustrates that the second air delivery apparatus is disposed along the latitudinal horizontal members 450, 420 such that channel vents 38 may direct air onto one or more plants and/or a second plant grow rack (not shown) that may be positioned upon the one or more latitudinal horizontal members 320, pair of latitudinal horizontal members 350, and/or pair of longitudinal horizontal members 310. [0080] Plant grow rack apparatus 200 may include a fourth level that may include a pair of longitudinal horizontal members 510 spaced apart from and substantially parallel to each other. The fourth level may also include a pair of latitudinal horizontal members 550 spaced apart from and substantially parallel to each other. The pair of longitudinal horizontal members 510 and the pair of latitudinal horizontal members 550 may be connected to each other and/or to one or more of the vertical supports 530. The fourth level may include one or more additional latitudinal horizontal members 520 spaced apart and between the pair of latitudinal horizontal members 550.

[0081] A fourth plant grow tray (not shown) may be positioned upon the one or more latitudinal horizontal members 520, pair of latitudinal horizontal members 550, and/or pair of longitudinal horizontal members 510. The second plant grow tray may be identical or similar to the first plant grow tray.

[0082] As shown in the figures, a third air delivery apparatus 10 is shown connected to an underside of one or more of the pair of latitudinal horizontal members 550 and/or the one or more additional latitudinal horizontal members 520. Fig. 10 illustrates that the third air delivery apparatus is disposed along the latitudinal horizontal members 550, 520 such that channel vents 38 may direct air onto one or more plants and/or a third plant grow rack (not shown) that may be positioned upon the one or more latitudinal horizontal members 420, pair of latitudinal horizontal members 450, and/or pair of longitudinal horizontal members 410.

[0083] In some embodiments, the air delivery apparatus of the plant grow rack, may include an inlet; a fan connected to the inlet; a chamber connected to the inlet; a channel connected to the chamber, the channel including a bottom wall; a plurality of channel vents disposed in the bottom wall; and a flow diverter constructed to direct air in the chamber toward a channel. The channel vents may be constructed to receive air within the channel and direct the air down toward the first tray. In some embodiments, the plant grow rack may include a plurality of third vertical supports, each one of the plurality of third vertical supports including a first end and a second end and a third tray connected to second ends of the plurality of third vertical supports.

[0084] In one example, a plant grow rack may include a plurality of vertical supports; a first plurality of horizontal longitudinal members, wherein a first one of the first plurality of horizontal longitudinal members is connected to a first pair of the plurality of vertical supports; a first plurality of horizontal latitudinal members, wherein a first one of the first plurality of horizontal latitudinal members is connected to either one of the plurality of vertical supports or one of the first plurality of horizontal longitudinal members; a second plurality of horizontal longitudinal members, wherein a first one of the second plurality of horizontal longitudinal members is connected to the first pair of the plurality of vertical supports; a second plurality of horizontal latitudinal members, wherein a first one of the second plurality of horizontal latitudinal members is connected to either one of the plurality of vertical supports or one of the second plurality of horizontal longitudinal members; and a first air delivery apparatus connected to an underside of one or more of the second plurality of horizontal latitudinal members. The first air delivery apparatus may include an inlet, a chamber connected to the inlet, a channel connected to the chamber, the channel including a bottom wall, a plurality of channel vents disposed in the bottom wall, and a flow diverter constructed to direct air in the chamber toward a channel, wherein the channel vents are constructed to receive air within the channel and direct the air down toward the first plurality of horizontal latitudinal members.

[0085] In another example, the plant grow rack may further include a third plurality of horizontal longitudinal members, wherein a first one of the third plurality of horizontal longitudinal members is connected to the first pair of the plurality of vertical supports; a third plurality of horizontal latitudinal members, wherein a first one of the third plurality of horizontal latitudinal members is connected to either one of the plurality of vertical supports or one of the third plurality of horizontal longitudinal members; and a second air delivery apparatus connected to an underside of one or more of the third plurality of horizontal latitudinal members. The second air delivery apparatus may include an inlet, a chamber connected to the inlet, a channel connected to the chamber, the channel including a bottom wall, a plurality of channel vents disposed in the bottom wall, and a flow diverter constructed to direct air in the chamber toward a channel, wherein the channel vents are constructed to receive air within the channel and direct the air down toward the second plurality of horizontal latitudinal members.

[0086] In some embodiments, the plant grow rack may further include a first blower connected to the inlet of the first air delivery apparatus and a second blower connected to the inlet of the second air delivery apparatus. In some embodiments, a method of distributing air across a plant grow rack may include using a first blower to move air (e.g., blowing air, drawing air, etc.) within a first channel of a first air delivery apparatus positioned above a first level of the plant grow rack; exiting (e.g., causing, blowing, and/or directing) air from a plurality of channel vents disposed within a bottom surface of the first channel, the air flowing downward toward one or more plants positioned along the first level of the plant grow rack; using a second blower to move air (e.g., blowing air, drawing air, etc.) within a second channel of a second air delivery apparatus positioned above a second level of the plant grow rack; and exiting (e.g., causing, blowing, and/or directing) air from a plurality of channel vents disposed within a bottom surface of the second channel, the air flowing downward toward one or more plants positioned along the second level of the plant grow rack. In another example, the method may further include using a third blower to move air (e.g., blowing air, drawing air, etc.) within a third channel of a third air delivery apparatus positioned above a third level of the plant grow rack; and exiting air from a plurality of channel vents disposed within a bottom surface of the third channel, the air flowing downward toward one or more plants positioned along the third level of the plant grow rack. In another example, the first channel used in the method may include two first channels spaced apart from each other. In another example, the second channel used in the method may include two second channels spaced apart from each other. In another example, the third channel used in the method may include two third channels spaced apart from each other. In another example, the method may include creating turbulence in the air moving within the first, second, and third air delivery apparatuses.

[0087] Referring to FIGS. 16-19, an embodiment of air delivery apparatus 10 is shown. In this embodiment, air delivery apparatus 10 includes end extensions 60 detachably connected to respective ends (e.g., distal ends) of the channels (e.g., channels 30a, 30b). End extensions 60 include one or more plates (e.g., a first plate 62a, a second plate 62b) connected thereto to enable end extension 60 to be connected to end bracket 40. The one or more plates may include one or more holes and end bracket 40 may include one or more respective holes corresponding to the one or more holes of the plates such that these holes of the plates and end bracket when aligned receive a screw or bolt to connect end extension 60 to end bracket 40. It is understood any various devices and methods of detachably or permanently connecting end extensions 60 to end brackets 40 may be used.

[0088] End extensions 60 have one or more holes (e.g., 8 holes) to received respective screws or bolts 66. The distal ends of the channels (e.g., 30a, 30b) may include one or more slots 64 (e.g., 8 slots). Slots 64 are sized and configured to give a desired range of length extension that is desired to be provided to the channels. For example, the slot may be 12 inches long, 8 inches long, 6 inches long, 4 inches long, 3 inches long, 2 inches long, or 1 inches long. In some embodiments, the slot is 1.7 inches long.

[0089] End extensions 60 insert into the distal ends of the channels such that the one or more slots 64 align with correspond to the one or more holes disposed within the channels. Air delivery apparatus 10 may include one or more screws 66 such that such shanks of screws 66 slide through the respective one or more slots 64 and are received within the respective holes disposed within the channels. When loosened, screws 66 may slide along and within respective slots 64 along the respective lengths of each slot. When loosened or removed, screws 66 permit end extensions 60 to slide into or out of the respective distal ends of the channels (e.g., 30a, 30b) and thus permit the length of the channels to be adjusted to a desired length. When at the desired length, screws 66 may be tightened within respective slots 64 and holes, holding the length at that desired length. It is understood any various devices (e.g., bolts) and methods of detachably connecting end extensions 60 to the channels may be used to enable the channel length to be adjustable.

[0090] For example, one or more slots 64 may permit an extension from 0 inches to 12 inches of length extension. In some embodiments, one or more slots 64 may permit an extension from 0 inches to 8 inches of length extension. In some embodiments, one or more slots 64 may permit an extension from 0 inches to 6 inches of length extension. In some embodiments, one or more slots 64 may permit an extension from 0 inches to 4 inches of length extension. In some embodiments, one or more slots 64 may permit an extension from 0 inches to 3 inches of length extension. In some embodiments, one or more slots 64 may permit an extension from 0 inches to 2 inches of length extension. In some embodiments, one or more slots 64 may permit an extension from 0 inches to 1.7 inches of length extension. In some embodiments, one or more slots 64 may permit an extension from 0 inches to 1 inch of length extension.

[0091] FIGS. 20-22 show views of another embodiment of an air delivery apparatus 600, which shares many of the features of the air delivery apparatus 10 but includes an alternate embodiment of a main chamber 612, which is also shown in isolated and exploded form in FIG. 25. As may be most apparent in FIGS. 21 and 22, the shown main chamber 612 features a wedge- like structure that is distinct from that of the main chamber 12 shown in FIG. 1 and elsewhere. The air delivery apparatus 600 can define a longitudinal centerline Cl that is physically centered along the air delivery apparatus 600. The bottom wall 624 of the main chamber 612 can reside in a plane Pl that is parallel to the longitudinal centerline Cl of the air delivery apparatus 600. The top wall 622 descends relative to the plane Pl from its highest point, where the main chamber 612 connects to the channels via the chamber outlets 618a, 618b (e.g., the proximal edge of the bottom wall 624), to its lowest point, at the distal edge of the bottom wall 624 opposite the chamber outlets 618a, 618b. As a result, the overall vertical space between the top wall 622 and the bottom wall 624 decreases as a function of the proximity of the top wall 622 to the bottom wall 624. The chamber inlet 616 can define a centerline C2 (FIG. 22) that intersects the longitudinal centerline Cl and defines an angle Al therebetween that is measured between an uppermost portion of the chamber inlet 616 and the portion of the longitudinal centerline C 1 that extends from the centerline Cl towards the distal edge of the bottom wall 624. The chamber inlet 616 can be coupled with the top wall 622 and can accordingly be angled towards the chamber outlets 618a, 618b such that the angle Al is less than 90 degrees.

[0092] The structure and arrangement of the main chamber 612 provides several advantages. As an example, the reduced volume of the main chamber 612 reduces the volume of space in which airflow entering the main chamber 612 via the chamber inlet 616 may flow, most significantly in areas that are distal from the chamber outlets 618a, 618b, which has the effect of reducing the potential for undesirable directions and patterns of airflow (e.g., high velocity airflow in a direction other than towards the chamber outlets 618a, 618b), and increasing laminar flow through the chamber outlets 618a, 618b.

[0093] As another example, the chamber inlet 616, which may be fitted with a fan or other source of airflow, introduces such airflow to the main chamber 612 at an angle that is nonperpendicular to the bottom wall 624. As a result, airflow entering the main chamber 612 is already moving in the direction of the chamber outlets 618a, 618b, and so will be biased towards entering those outlets rather than deflecting towards the opposite edge or other edges of the main chamber, which may result in turbulent pockets of air and a reduced volume and velocity of air exiting via the chamber outlets 618a, 618b. [0094] As yet another example, the overall structural strength of the main chamber 612 is increased relative to that of the chamber shown in FIG. 1, especially when constructed from semiflexible materials such as sheet metal, due to the wedge-like geometry. As a result, the diameter of the chamber inlet 616 may be substantially increased, as well as the diameter and/or throughput of the corresponding fan or other source of airflow that is coupled to the chamber inlet 616.

[0095] While the chamber inlet 616 is shown as an open cylinder, it should be understood that the chamber inlet 616 may be of varying structure and position in different implementations. As an example, the chamber inlet 616 in FIG. 22 is shown mounted to the surface of the top wall 622 at an angle matching that of the top wall 622 (e.g., relative to the bottom wall 624, an angle between about 60 degrees and about 70 degrees). However, the chamber inlet 616 may instead be mounted at a different relative angle by changing its overall shape to that of an slanted or oblique cylinder, or a cylindrical ellipse, or may be mounted at a different relative angle by coupling the chamber inlet 616 to the top wall 622 so that a portion of the bottom edge of the chamber inlet 616 is partially contained within the main chamber 612. In this manner, the chamber inlet 616 may be fixed to the top wall 622 at a range of desired angles relative to the bottom wall 624 (e.g., between about 15 degrees and about 80 degrees). In some implementations the chamber inlet 616 may be fitted with a straight, angled, or curved extension section to further vary the position at which the airflow source mounts, and the resulting direction and flow of air. As an example, an angled or curved extension may allow the airflow source to be mounted at any desired angle or offset relative to the chamber inlet 616.

[0096] Turning now to FIGS. 23 and 24, those show the main chamber 612 with the top wall 622 removed to illustrate the interior of the main chamber 612, which includes a pair of structural flow diverters 602a, 602b positioned to each side of the chamber inlet 616. A structural flow diverter 602 is shown in isolation in FIGS. 28A-28C, and includes a mount plate 800 usable to fix the structural flow diverter 602 to the bottom wall 624, a flow control surface 802 having an angled edge 806, and a structural brace 804. The flow control surface 802 influences and diverts nearby airflow, while the angled edge 806 supports the top wall 622. The structural brace 804 increases the structural strength of the flow control surface 802 while minimizing the impact on nearby airflow. Referring again to FIGS. 23 and 24, the structural flow diverters 602a, 602b are coupled to the bottom wall 624 (e.g., by a mechanical coupling, spot weld, or other means) by their mount plates 800, and the angled edge 804 of the structural flow diverters 602a, 602b contacts and supports the top wall 622 when it is installed.

[0097] The angle of the angled edge 804 may be varied depending upon the overall geometry of the main chamber 612 in order to provide an edge that maintains contact with the top wall 622 along all or substantially all of the angle edge’s 804 length, as illustrated in FIGS. 26A and 26B, which show side elevational views of the main chamber with the top wall 622 visible (FIG. 26A) and transparent (FIG. 26B). The angled edge 804 may be in contact with but not coupled to the top wall 622, or may permanently or removably coupled to the top wall 622 through the use of spot welds or mechanical connectors such as a slot and tab arrangement.

[0098] As can be seen in FIG. 24, the structural flow diverters 602a, 602b are arranged asymmetrically on the bottom wall 624, such that the same structure (e.g., the flow diverter 602) is used on each side. The flow control surfaces 802 of the structural flow diverters 602a, 602b can define respective centerlines C3. A vertical plane P2 can be orthogonal to the plane Pl and can intersect the intersection of the longitudinal centerline Cl and the centerline C2 (see FIG. 22). The centerlines C3 can intersect the longitudinal centerline Cl and define respective angles A2 therebetween that are measured between the centerlines C3 and the portion of the longitudinal centerline Cl that extends from the plane P2 towards the proximal edge of the bottom wall 624. The structural flow diverters 602a, 602b can be angled outwardly relative to each other and towards the chamber outlets 618a, 618b such that the angles A2 are each less than 90 degrees.

[0099] This position of the structural flow diverters 602a, 602b conditions and creates desirable airflow towards each of the chamber outlets 618a, 618b, while also providing sufficient structural support of the top wall 622 to support the weight of the chamber inlet 616 and a mounted fan or other airflow source. This arrangement is also advantageous from a manufacturing standpoint, as a single part (e.g., the structural flow diverter 602 of FIG. 28A) may be used in an asymmetrical pair, which reduces the complexity of assembling and maintaining the main chamber 612.

[0100] While the arrangement of structural flow diverters 602a, 602b shown in FIG. 24 and elsewhere is advantageous for at least the reasons noted above, it should be understood that other advantageous variations on the position and form of structural flow diverters exist and are apparent in light of this disclosure. FIGS. 27A-27H each illustrate such an example by way of a schematic illustration of variations on flow paths of the main chamber 612 which include the position of the chamber inlet 716 illustrated by dotted lines.

[0101] FIG. 27A illustrates a flow path 700 substantially similar to that of FIG. 24, wherein a pair of matching structural flow diverters 702a, 702b are positioned to each side of the chamber inlet 716, with each structural flow diverter 702a, 702b having a longer flow control surface and a shorter structural brace surface, as has been described.

[0102] FIG. 27B illustrates a flow path 710 wherein a pair of symmetrical or mirrored structural flow diverters 702, 704 are positioned to each side of the chamber inlet 716, with each structural flow diverter 702, 704 having a longer flow control surface and a shorter structural brace surface, as has been described.

[0103] FIG. 27C illustrates a flow path 720 wherein a pair of matching structural flow diverters 704a, 704b are positioned to each side of the chamber inlet 716, with each structural flow diverter 704a, 704b having a longer flow control surface and a shorter structural brace surface, as has been described.

[0104] FIG. 27D illustrates a flow path 730 wherein a pair of symmetrical or mirrored structural flow diverters 702, 704 are positioned to each side of the chamber inlet 716, with each structural flow diverter 702, 704 having a longer flow control surface and a shorter structural brace surface, as has been described.

[0105] FIG. 27E illustrates a flow path 740 wherein a pair of symmetrical or mirrored structural flow diverters 706a, 706b are positioned to each side of the chamber inlet 716, with each structural flow diverter 706a, 706b having two long control surfaces that both influence airflow and provide structural support.

[0106] FIG. 27F illustrates a flow path 750 wherein a pair of symmetrical or mirrored structural flow diverters 708a, 708b are positioned to each side of the chamber inlet 716, with each structural flow diverter 708a, 708b being larger than those shown in FIG. 28, and having two long control surfaces that both influence airflow and provide structural support. As shown in FIG. 27F, increasing the size or length of a control surface provides additional structural support for the top wall 622 and chamber inlet 616, and also provides an increased surface area to control and direct the flow of air towards the chamber outlets 718a, 718b. [0107] FIG. 27G illustrates a flow path 760 wherein a pair of matching structural flow diverters 702a, 702b are positioned to each side of the chamber inlet 716, and the overall geometry of the main chamber 714 has been changed relative to prior examples to remove any corners or walls that would not direct airflow towards the chamber outlets 718a, 718b.

[0108] FIG. 27H illustrates a flow path 770 similar to that of FIG. 27G, wherein a pair of matching structural flow diverters 702a, 702b are positioned to each side of the chamber inlet 716. The overall geometry of the main chamber 712 is similar to that of prior examples, however, a set of structural inserts 772a, 772b, 772c, illustrated as patterned regions, are positioned within the main chamber 712 in order to fill areas where airflow may not be desirable, such that the overall flow path 770 shares some similarities with that of FIG. 27G. The structural inserts 772a, 772b, 772c may be formed of rigid foam, plastic, paper, or other materials, and may provide structural support for the top wall 622 and chamber inlet 616, in addition to providing additional flow control surfaces.

[0109] The characteristics of different features of an air delivery apparatus may be selected based upon each particular implementation in order to provide a desired velocity or volume of airflow through each air discharge fitting or channel vent along the length of the air delivery apparatus. For example, where an ideal, optimal, or otherwise desired air velocity for circulating air from the air delivery apparatus to the canopies of nearby plants (e.g., within about 6 and about 18 inches below the air delivery apparatus) is known, characteristics such as the size and power of a fan or other airflow source, the size, position, angle, and shape of air discharge fittings or channel vents, the entry angle of airflow into the main chamber, the size, geometry, and other characteristics of the main chamber, the length or cross-sectional area of channels, and other characteristics may be varied in order to achieve such a desired air velocity, with such variations being apparent to those of ordinary skill in the art in light of this disclosure.

[0110] The foregoing description of embodiments and examples has been presented for purposes of illustration and description. It is not intended to be exhaustive or limiting to the forms described. Numerous modifications are possible in light of the above teachings. Some of those modifications have been discussed, and others will be understood by those skilled in the art. The embodiments were chosen and described in order to best illustrate principles of various embodiments as are suited to particular uses contemplated. The scope is, of course, not limited to the examples set forth herein, but can be employed in any number of applications and equivalent devices by those of ordinary skill in the art. Rather it is hereby intended the scope of the invention to be defined by the claims appended hereto.