Digital Thermostat Control For Attic Fan? - HVAC - DIY Chatroom Home Improvement Forum

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Old 06-08-2011, 04:49 PM   #1
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digital thermostat control for attic fan?

Can I use my existing digital thermostat control for the attic fan?

I currently have the furnace connected to it by no AC unit. I'm assuming it communicates via low voltage and I would need a relay of sorts on the other end, but it sure seems better than mounting another thermostat on the wall.


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Old 06-08-2011, 05:07 PM   #2
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Im sure you could, but you would need to hook it up to a 120volt contact with a 24volt control

But why? Most attic fans come with a thermostat already installed on the line that you can set from like 60 to 150 degrees, if it doesnt have one you can pick one up to install on the supply line of the attic fan.

check out:

i know my local home depot and lowes sells them, google: attic fan thermostat

EDIT: Wait, just ran it through my tired brain again, No- it wont work if you use your current thermostat which is reading temp from your conditioned space, Attic fan kicks on and off with the temp. in the attic space ( i think mine is set at 105 ) .. unless you mean installing a digital t-stat in your attic.


Last edited by alecmcmahon; 06-08-2011 at 05:15 PM.
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Old 06-08-2011, 05:18 PM   #3
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I want to use it as a whole house fan by installing a vent in the ceiling during the summer and have it regulated by room temperature, not attic temp. But this is all hypothesis in trying avoid a noisy WHF at the moment. Maybe I just use an attic thermostat as you suggest..??.. It's just that the wall mounted thermostat would give me new control I I wanted to override it's operation.
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attic fan , thermostat

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