The Bio Green Power 1500 watt fan heater is a very energy efficient, and inexpensive to operate due to the thermostat accuracy. This greenhouse heater has an IP X4 splash-proof stainless steel housing with a durable fan made for humid environments, and is ideal for greenhouses, sheds and store rooms. The digital summer/winter thermostat allows you extend your growing season with the ability to vary your temperature from 50 degrees F to 95 degrees F . With heating output of 5118 BTU / 1500 watts , this commercial quality greenhouse heater will cover areas up to 120 ft² or 2.6 m²