Affordable thermostat fan speed controller?

I am looking for an inexpensive way to control my noisy inline exhaust fan in order to help control noise, the temps in my room, and help reduce the electricity used.

Is there an inexpensive fan speed controller that uses a thermostat to help regulate grow room temps by controlling the speed of my exhaust fan?

Check this thread. You might find something in there.

https://www.rollitup.org/grow-room-design-setup/237610-best-deals-thread-post-best.html

one way to quiet your inline fan is to put a filter on the end of if 2dollars home depot