Attic Vent Fan Recommendation and Roof Location

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  #1  
Old 06-19-16, 12:50 PM
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Attic Vent Fan Recommendation and Roof Location

Hi all,

I need to add an attic vent fan to my roof. I am thinking of adding too. my roof is like a trapezoid. So it is less wider at the very top.

I am thinking of adding the attic vent fan on the south side.

Any recommendations on brands and roof location? North? West?

I am in SoCal, LA area.
 
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Old 06-20-16, 01:13 PM
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Before you go too far, you need to determine the square footage of the attic, the number of air changes per hour desired, and if the attic is vented to handle the air exchanges.

More important than where your exhaust the air is to determine where the makeup air is coming from.
 
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Old 06-20-16, 01:23 PM
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Well, snow isn't a problem for you, but if you run ac inside your house, too many leaks from house to attic will steal a lot of your nice cool air when that fan is running.

As goldstar asked, what do you have currently for ventilation and insulation?

Bud
 
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Old 06-20-16, 01:44 PM
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I have soffit vents that lead into the attic. It doesnt appear like I have a ridge vent. House is from 1946.

Insulation is blown insulation.

The house is 2500sq feet.

Thanks.
 
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Old 06-20-16, 01:50 PM
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Are the soffit vents continuous or just here and there? Are they covered by the insulation?
 
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Old 06-20-16, 01:55 PM
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They are just there. Every few feet. They are NOT covered by the insulation.
 
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Old 06-20-16, 02:21 PM
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I hate to be a pain, but the information provides so far is insufficient to make a meaning full recommendation.

What I (we) need is actual ventilation area. If you can't measure what you have, perhaps a few pictures. You say it does not appear to have a ridge vent, are you looking from the outside or inside the attic?

Are there gable vents or other roof vents?

Bud
 
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