Air Conditioning - Correct attic fan temp?

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Copyright
06-05-06, 06:53 PM
Ive read 95 degrees and I was told 110 by an electrican. Which is the proper temp to set my attic fans to come on? I am in the middle of replacing them so I figured this is a good time to verify thier temp setting. Thanks!

Rob61
06-05-06, 08:44 PM
Ive read 95 degrees and I was told 110 by an electrican. Which is the proper temp to set my attic fans to come on? I am in the middle of replacing them so I figured this is a good time to verify thier temp setting. Thanks!


I set them at 95.
Copyright
06-05-06, 09:11 PM
Thanks.. I just got one of mine done and set it at 95.. talk about a job!

Pendragon
06-06-06, 05:48 AM
At 95 it will probably never turn off, even at night, at least not in the south, 110-120 is fine.
Copyright
06-06-06, 09:23 AM
After I isntalled it last night I turned it turned it down to 80 before it would kick on. Im in Houston Texas so i know its going to get warmer towards august. Ill check to see if it kicked when I go home today.
Copyright
06-06-06, 05:24 PM
Well the fan was working fine today and then later on I noticed it turned off but still in the middle of hte hot day. I go to play with the thermostat and nothing. I wired direct power to the fan bypassing the thermostat and nothing. Its brand new and just burned up!
Ed Imeduc
06-06-06, 07:27 PM
we set them off at 100o

ED;)
Copyright
06-06-06, 07:46 PM
Thanks ED im starting to think 100 is more ideal. Can you tell me if you have ever used a Home Depot MASTER FLOW brand blower motor setup? Mine has deffinately gone bad after one day of use.
Ed Imeduc
06-06-06, 07:57 PM
Hard to say what to use today . Have used all kinds over the years. Some last longer than the rest. You just never know what brand will last for a lone time. Might try Broan and Air Vent. But HD should back the one you have.

ED;)
Copyright
06-06-06, 09:31 PM
Thanks Ed, I am actually looking at Broan but not sure where I can pick one up locally. The one I found online is 121$ which is fine but I dunno for sure if hte blade it has will fit up inside the dome/tube I currently have in place. Unless they are all a standard size. I think mine was between 13-14". The Broan I found is 14" so I assume it will fit. Talk about mad if I order it online and it doenst! :rolleyes:
Ed Imeduc
06-07-06, 12:57 PM
Just rule of thumb

Sq ft of attic X 0.7 = Cfm of fan

ED;)
Copyright
06-07-06, 03:24 PM
how do I figure the attic square footage? I know the house is 1800 without hte garage. My attic has some tall celings.. probably 10ft atleast. I have an 8ft ladder setup now to reach the dang attic fans.
Ed Imeduc
06-07-06, 09:36 PM
Just use that 1800 sq ft of the home thats what you have in the attic.

ED;)