OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › OpenSprinkler Pi Exhaust Fan – Sealed Case Cooling › Re: Re: OpenSprinkler Pi Exhaust Fan – Sealed Case Cooling June 23, 2014 at 4:55 pm #27138 scottshParticipant @Lamby wrote: You could get a 24vac one, attach it to one of the solenoid relays and write some code to turn it on when it gets hot? I love this idea – I’m not sure there are 24VAC fans but being able to control it based on temp or a schedule or whatever would make sense.