Feb 5th 2008 is the release of a revolutionary software tool that enables you to measure anything in a photograph. Benefits Now you can obtain accurate measurements without ever leaving your home or office because you can have clients email photos to you. Click to see more:
 
 Email to a Friend  Bookmark this Page
 
   
   
   
Attic Fan Ventilation Calculator

Attic Fan Ventilation Calculator

This calculator requires the use of Javascript enabled and capable browsers. This calculator is designed to arrive at a reasonable attic or ceiling crawl space ventilation fan air volume displacement rating for minimum, normal and optimum outside heat conditions. This vent fan removes heated air from inside that space and should be placed near the peak to effectively remove the hottest air. The extreme conditions might be considered the normal use in extreme high heat areas. Enter the length and width of your attic or ceiling crawl space. Then enter the height at the highest point. Select if your roof is more flat of peaked. Then click on Calculate.
Unit
Number
Required Data Entry
Height Feet
Width Feet
Length Feet
Roof Type
   
Calculated Results
Minimum Conditions Ventilation Fan Rating CFM
Normal Conditions Ventilation Fan Rating CFM
Extreme Conditions Ventilation Fan Rating CFM
Version 1.4.4