wholehouse fans?


Old 05-02-02, 01:25 PM
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Question wholehouse fans?

what are the pros and cons of a wholehouse fan? noise level? size to choose? location to install? any favorite models or brands?
Old 05-05-02, 03:58 PM
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The size is usually one exchange per minute. So if your home is 1600 sq. ft. with 8 ft. ceilings ( 1600 x 8 = 12,800 cubic feet), get a whole house fan that's 12,000 cfm.

The noise level with these types of fans are usually result of not having enough windows and doors open when they're on or the louver in the attic to the outside is too small. Even if you have some one install it for you, you should read the installation instructions carefully.

As far as brands, most fans this size are belt driven and it really doesn't matter who makes it. They're all basically the same.

I prefer mounting the fan on a gable and putting the louver on the upstairs hallway ceiling. It's true that the fan will pull air from the attic vents, but considering the size of the attic vents, the air exchange in the house will still be less than 2 minutes.

There are a lot of advantages to having a whole house fan which you're probably aware of. If this is your first time with a fan of this type, there are some things you should be made aware of. The louver in the hallway should be made air tight during the winter. These louvers will not stop heat, so seal it with a piece of plastic. If you don't, it will create a moisture problem in the attic, including ice damming on your roof. The louver on the gable should be prohibited from opening in the winter. This is to avoid birds or squirrels from migrating in your attic. On those nice cool spring days when you find that yellow green pollen all over your car, don't use the fan. If you do, within a few minutes, you'll cover every square inch of the house with that pollen.

Whole house fans are great and inexpensive way to cool your home. People are discouraged with them because they may have experienced one or more of the things mentioned. But as you can see, it's very easy to avoid those problems.

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