A greenhouse should offer plants an optimal habitat all year round regardless of the outside temperature. The hot air is primarily needed at a low level. The thermostically controlled Frosty gas-powered greenhouse heater, ensures the best possible prerequisites for plant cultivation and overwintering in the greenhouse. During combustion over 99% of the energy is also transformed into heat, making this gas heater economical and efficient. The stainless steel radiant grid converts part of the convection heat into radiant heat, this provides more heat at ground level while at the same time lowering the outlet temperature. Settings of 0 - 25c are possible. The Frosty gas-powered greenhouse heater can be used as a standing or wall mounted device.