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Old 02-22-2013, 01:15 AM   #1
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Height from ground for Fresh Air Intake


I need to install a fresh air intake to the basement, and wondering what sort of clearance I should have from the ground. I've got a bit over 2 feet between ground level and the subfloor. I'm in Minnesota, so I ask because of the potential for snow to block the intake.

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Old 02-22-2013, 05:14 AM   #2
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Height from ground for Fresh Air Intake


12" above normal snow fall accumulation level.

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Old 02-22-2013, 07:12 AM   #3
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Height from ground for Fresh Air Intake


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Originally Posted by beenthere View Post
12" above normal snow fall accumulation level.
So do I then need to put a gooseneck in my line? To do 12" above snow level on a straight shot I would have to run it through one of the exterior walls of a bedroom....
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Old 02-22-2013, 06:45 PM   #4
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Height from ground for Fresh Air Intake


Goose neck it.
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Old 02-26-2013, 08:16 AM   #5
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Height from ground for Fresh Air Intake


Forgot to ask this one earlier....what diameter of pipe do I need for this? It's a 105K boiler and a 30K water heater in an open 900 sqft basement. I'm actually puzzled by the need for the air supply, but the guy who's servicing our water heater (under warranty) won't do the work until after one is installed.
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Old 02-26-2013, 06:24 PM   #6
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Height from ground for Fresh Air Intake


By code, 68 sq inches of cross section. 9" round. Many contactors just run a single 6".

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