Whole House Fans

Used to remove hot air from inside a home and replace it with cooler air from the outside in the late afternoon or evening. Very effective after hot summer days when there is little or no wind. Even a short run can cool the house 10 to 20 degrees.

Combine with "earth tubes" to cool during the heat of the day.

Once the outside air has been drawn into the house, there is no point in running the fan any longer. Fans with low speed modes or automatic controlls may be justified.

Calculate the interior square footage of living area (do not include garage, attic or basement) and multiply the total square footage by three. This will give you the CFM number required for the whole house fan

Consider using some foam, rubber or other material to isolate vibration when mounting the fan.

The shutter will leak hot air during the winter unless the fan can be sealed in the fall and re-opened in the spring.

Also:

• /techref/other/spac.htm Solar powered Air Conditioning+

See also:  

• $189.00 Master Flow 24 In. Whole House Fan With Shutter Model WHFS24M No CFM listed
   
• $165.75 Whole House Fan, Propeller Diameter 24 Inches, High Speed Current 2.8 Amps, High Speed Power 240 Watts, Low Speed 600 RPM, High Speed 775 RPM, Low Air Flow 3200 CFM, High Air Flow 4500 CFM, Height 7 Inches, Dimension 27 1/2 Inches, 120 Volts, Horizontal Mount, Two Speed, Direct Drive,Includes Shutter AIR VENT, INC. WH242MLX
   
• $199 Whole House Fan, Propeller Diameter 30 Inches, High Speed Current 5.6 Amps, High Speed Power 500 Watts, Low Speed 600 RPM, High Speed 775 RPM, Low Air Flow 4275 CFM, High Air Flow 5700 CFM, Height 7 Inches, Dimension 34 Inches, 120 Volts, Horizontal Mount, Two Speed, Direct Drive,Includes Shutter AIR VENT, INC. WH302MLX
   
• $159 24" 4500 CFM dual speed, direct drive. WH242MLX
   
• $167 30" 5700 CFM dual speed Direct Drive Fan. WH302MLX
   

See also:

• http://www.ilocano.net/suburbanFan/ Good Post- Here is a place that has an on line whole house fan calculator that is helpful for getting the correct size fan based on the square footage of your home. suburbanfan.com
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