Easy and straightforward, set the desired temperature with the large highly-visible dial to provide power to your exhaust fan/intake vent. The PECO TF115P-002 is configured for cooling but comes with a wiring diagram if youd like to switch it for use with a heater. These are rugged thermostats built for long-term, reliable performance in a variety of climate conditions, including moist greenhouses, due to the weather-resistant enclosure. It tolerates moist conditions, performs despite water spray, high humidity, airborne contaminants, and heat. This thermostat is built from corrosion-resistant materials, allowing long life & reliable performance in the most demanding climates. Simple plug-in setup: plug into a 110/120 power source, then plug your cooling device into the piggyback plug on the cord. To use with a heater to heat the greenhouse in cold temperatures, the front cover must be removed and rewired according to the enclosed diagram. This is the thermostat we offered pre-pandemic for many years and is well-liked by all our customers. It is a great alternative for simple setups where a fancier digital control is not needed. Temperature range: 40-110°F Enclosure: NEMA 4X