Using this greenhouse heater can keep your plants from freezing during the colder months. The heater is a fan force heater that can provide a reliable and efficient heat source to your greenhouse plants. This greenhouse heater， permanently lubricated for life， uses a totally enclosed， thermally protected and heavy duty ball bearing motor that provides long life with very low maintenance required. It has a precision temperature sensor with a built-in over-heat protection， adjustable thermostat control， which allows you to create the best climate for your plants. Plus， this heater is equipped with heavy duty steel housing， an IPX4 structure that is protected against water splashing. It is sure to protect your tender plants from becoming a frosted， soggy mush and keep your young plants snug and warm until spring.