plug in thermostat

Hi guys, I want to have a thermostatic intake fan to bring cold air in when the room gets over 27c. I have a duct fan to use already, but ideally looking for a plug with thermostat on the end of a wire

I spliced a Duo Stat into my fan. It makes it so I can set the humidity and the temp to make my fan go on.



When I tried it only on temps, my humidity shot through the roof.

If humidity is not a concern you can use a ductstat plug in:

This one works for me.. The only bad thing about this is that there is no remote sensor for temp. So you need to use this close to where you want to control temps.