There is an inline thermostat that you can buy at Lowes or Home Depot that you just plug a fan into and can adjust the thermostat. They're about $30.
killerweed420 Reviewed by killerweed420 on . Theromstat to redirect 6" air in / out Like have it on a 6" duct Y that will turn a flap and direct the hot air into the room until greater than 65° then it turns the flap to direct the light air back to exhaust. Has it be done or is it commercially available? This sounds like a great protection that uses almost no electricity. Rating: 5