To provide a heating system with superior usability capable of substantially speeding up from ignition to heating.

A body 28 to be heated having a space part isolated from a combustion space 5 of a combustion casing 6 in an interior is provided at an upper part of a combustion furnace 9 wherein a woody pellet 8 supplied from a woody solid fuel supply system 4 is inputted and ignited. Air sent from a fan 24 is used as air for combustion via an air supply pipe 13 for combustion, and it is introduced into the body 28 to be heated in a sealed state via an air introduction pipe 27. The air introduced into the body 28 to be heated is applied with heat from the body 28 to be heated directly heated by combustion heat, it is heated in a short time, and it is delivered from an air blowout opening 31 of a front side plate of the combustion casing 6 in a clean state into a room.