Whole House Fan selection


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Old 05-20-12, 05:15 PM
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Whole House Fan selection

Hi, I am looking to purchase a whole house fan and am looking for suggestions.

Looking for 5-7k cfm (3000 sqft house), quiet, no need to cut rafters.

Would love to hear your thoughts on what you hate....

Thanks in advance.
 
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Old 05-20-12, 07:46 PM
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I would suggest a direct drive model for quietness.
 
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Old 05-20-12, 07:54 PM
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Whole house fans can cause problems if there isn't enough attic ventilation or a natural draft water heater.
 
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Old 05-21-12, 01:32 PM
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I'm also looking for a whole house fan. Lots of information on the web but I don't know anyone that has one installed. Are the Triangle fans your best bet or should I go with an AirScape design? Some information says I need 4200cfm, and others say 1200cfm is sufficient---who's right? I My home has approx 1300sqft attic space. Recommendations appreciated.
 
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Old 05-31-12, 04:13 PM
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I am also getting ready to purchase a whole house fan and this is the one I've got my eye on at the moment. THE SUPERFAN My house is roughly 1900 sqft and this fan is good up to around 2500cfm.
 
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Old 05-31-12, 04:19 PM
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Triangle fans look good to me, and probably where I am headed.

Pros:
inexpensive/cfm
quiet for the price
lots of options
made in the USA

Cons:
Need to build an insulated box for the attic when not in use
May need to cut rafters
 
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Old 05-31-12, 04:27 PM
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I have installed a few whole house fans, and I prefer the "old school" belt-driven fans, as they run slower, which usually means they are quieter. They do require a little bit of annual maintenance, but not much. If you don't want to cut any rafters, no-cut curbs are available for most fan sizes. I am NOT a fan of the smaller multi-fan units with the electrically operated dampers, as most of them do not move enough air to do an adequate job, and they are ridiculously expensive. I have always installed 12 hour timers to shut the units off during the night after the house is cool.
I like the Triangle belt-driven fans, as well as the belt-driven fans sold by Grainger.
Andy
 

Last edited by Andrew; 05-31-12 at 04:29 PM. Reason: Added information
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Old 05-31-12, 06:57 PM
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If AC isn't an option there ok.
 
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Old 06-01-12, 04:02 AM
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Good observations, Andy.

@Airman, I already have AC, looking to cool it more cheaply on certain days. For example, yesterday in NJ, high of 80, perfect weather. My upstairs heated to 80 by 7pm, and it was 72 outside. I could turn the AC on to bring it to 72, or I could turn on the fan and bring it 72 in half an hour at a one tenth the electricity.
 
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Old 06-01-12, 09:21 AM
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The issue will be the following day when you turn the AC on. It will have to run longer to remove the humidity out the home. House fans are not the answer in green grass states. AC is!
 
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Old 06-01-12, 09:37 AM
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Here in Wisconsin, we do have quite a bit of humidity for much of the summer. I agree with Airman that AC is best when the humidity is high, but there are many cool evenings after the heat of the day, when the whole house fan is perfect, as well as spring and fall days. It's just another weapon in the arsenal against summers blast.
 
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Old 06-01-12, 01:06 PM
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Whole house fans may allow a lot of warm, moist air into the attic in the winter.

They could very well be net energy loosers in cooler climates.
 
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Old 06-01-12, 01:38 PM
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Agreed, Muggle. That's why it's good to seal them or put an insulated cover over them during the winter months.
 
 

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