The present invention relates to an improved hot air supply efficiency and the ventilation efficiency in a greenhouse, and the boiler comprises a burner which is installed at one side of the body and the body is heated space therein is formed, is provided on the outside of the body, compressing the air within the compressed air storage unit is stored, one end connected to the storage unit above the compressed air, the other end communicates with the interior of the greenhouse, comprising compressed air gonggeupgwanreul to one side passes through the heating space of the main body, wherein the burner is the heating the one side of the compressed air supply pipe that passes through the heating space to provide hot air supply Greenhouse characterized in that conversion to the hot air flow of compressed air passing through the compressed air supply pipe.
According to the present invention as described above, a separate pressure-feeding for sending the hot air by the hot air is to be easily supplied to the interior of the greenhouse by using the expansion force of also heating the compressed air supplied into the greenhouse through the compressed air supply pipe as well as compressed air as well as to supply the hot air without using a means for continuously supplying a clean warm air that is not included in the exhaust gas inside the greenhouse is effective to provide a working environment harmless to the operator inside the greenhouse.