variac with thermostat

[Tornado]

Looking on a single variac setup to control my exhaust tornado box fan wouldnt mind been abit more automated to go slow and faster when need to

So what would i need to buy thermostat and some sort of relay

Then the wiring what goes where?

Should i wire the intake in so slows down with outtake thanks

[ratdog]

i have a variac but it's manual, you can't automate it imo. you would be better off buying a purpose made controller like an smscom one

[Laphroaig]

Check out my simple fan controller thread it's pinned at the top of the page.  It's several years old now and I have no idea where to source cheap variacs any more but it should give you a good start.  I'm still using mine!