A fan controller manages the extractors in your grow room. When temperatures becomes too high it kicks off the extractors. When temperatures becomes too low the extractors return to their low setting.

More on grow room climate:

• Create The Best Climate For Marijuana Grow Room
• Climate Problems And Your Marijuana Plants
• Ideal Temperature For Marijuana Plants
• Temperature In Your Marijuana Grow Room
• Humidity And Marijuana Plants

More climate related terms:

Climate | Air circulation | Airtight | Charcoal filter | Extractor | Fans | Hygrometer | Humidistat | Humidifier | Dehumifier | Heating