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Re: Mid efficiency furnace combustion air
Ted,
Remember, the code is only saying 'you can are allowed to get combustion air from the crawlspace', it is up to contractor to understand the specific installation conditions present at that installation.
With a crawlspace, such as those I would see when in Gainesville, Fl, or even in South Florida, those crawlspaces would never be blocked off, either intentionally or unintentionally by mother nature. Yes, over time the vents may have become blocked by paint, but that also happens to attic vents - that is where the home inspector (if no one else) points out and explains the problem and the solution.
The code permits things which are allowed ... it is up to the contractors to - here we get back to what I mentioned earlier - use their common sense and construction basics (basic construction knowledge).
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