Looking for a thermostat

[iskiatomic]

I have been in the process of getting some warm air upstairs in my home. My tin knocker BIL made me some duct work that includes a filter rack, a mount for an axial fan, and then it all goes into a floor register.

Now my question is, I would like to put a thermostat on this unit that will shut the fan down when the temp goes below the desired setting. So basically a themostat that works in the opposite way. Is there such an item?

This setup really moves the heat, I wish I did something like this sooner.

I hope I am explaining this correctly.

KC

 

[daryl]

Use the AC side of t-stat.

 

[begreen]

This need a close on rise switch. You'll need a transformer and a relay to use a conventional thermostat.

Most 110v thermostats are heating only - open on rise. But there are controls which have a SPDT switch and can be connected either way. Size appropriately for the inductive motor load:

http://www.grainger.com/Grainger/items/2E158?Pid=search
http://www.grainger.com/Grainger/items/2E503?Pid=search
http://www.grainger.com/Grainger/items/2E517?Pid=search

 

[semipro]

Maybe an attic fan thermostat would work for you.

 

[quads]

Sounds like you need a barn fan thermostat. The farm stores around here have several different models. Most not only work for cooling, but will control heaters too.

 

[quads]

One example:

http://www.farmandfleet.com/products/629482-barn_fan_replacement_thermostat.html