Winter Gardenz Frostguard fan is a 2KW electric fan with a heating element which is designed for warming and circulating the air in a greenhouse. It emits a gentle airflow of warm air which has an adjustable thermostat up to 400C and works on the principle of recirculating the warm air to increase the temperature, giving your plants the temperature they need to thrive. The Winter Gardenz Frostguard fan is ideal for residential greenhouse heating (non-commercial sizes) and can even be used as a fan on those hot days where only air circulation is required.