Calculating passive intake for roof venting.


  #1  
Old 10-05-04, 11:26 AM
exhobo
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Calculating passive intake for roof venting.

I have almost 36 sq. ft. of perforated vinyl soffet vent installed in my home and am trying to determine if I need more. How does one calculate the actual venting area of perforated vinyl soffet vent?

Also, I have 19 rectangular soffet vents installed (roughly 3" X 14") and don't know how to calculate the venting area of these.

I have calculated the sq. ft. in my attic and am trying to determine if I have reached 50% of the total passive intake venting requirement.

exhobo
 
  #2  
Old 10-10-04, 07:29 AM
H
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Attic ventilation

You need about 1 sq foot of venting for every 100-150 square feet of attic floor space.

The square footage of intake venting should be equal to the square footage of exhaust venting.
 
 

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