To provide a residential ventilation system for supplying the outside air from a natural air supply opening into a living space, capable of releasing charged fine grain liquid toward the habitable space by utilizing the flow of outside air from the natural air supply opening.

In this residential ventilation system for sending the outside air into the habitable space 1 through the natural air supply opening 4 formed on an exterior wall portion 3, an electrostatic atomizing device 9 releasing the charged fine grain liquid toward the neighborhood of the inside or a downstream side of the natural air supply opening 4 is detachably disposed.

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