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Old 11-24-2008, 04:18 PM
Gunnar Alquist's Avatar
Gunnar Alquist Gunnar Alquist is offline
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Join Date: Mar 2007
Location: Santa Rosa, CA
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Re: Mid efficiency furnace combustion air
Quote:
Originally Posted by Ron Bibler View Post
So Gunnar. in our area we have this company ( clean crawl space ) when they come in and button up the sub-structure to a home to control all moisture. when they block off the air vents they are in turn blocking off the lower air to any type of (heater/water heater) units. Not good. If its not one thing its another. Best Ron
Ron,

I agree. I see very few of these installations and have not seen one installed in a home that had an interior furnace. However, the more recent installations that I have seen have left the vents open. The plastic is still sealed to the foundation stemwall and mid-span support piers and a sump pump is located under the membrane. I still do not think that they are worth the money.
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