Air Compressor in Crawl Space - Good Idea or Not?

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Forum topic by ckorkyrun89 posted 02-10-2016 05:51 PM 559 views 0 times favorited 15 replies Add to Favorites Watch
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60 posts in 1446 days

02-10-2016 05:51 PM

I have been thinking about putting my air compressor in the crawl space of our house. Barring any sound issues (we have decent insulation), can anyone think of a bad reason to not do this? I have thought about the humidity and needing to drain the tank more often. I think I can deal with this by just draining it often enough.

15 replies so far

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680 posts in 647 days

#1 posted 02-10-2016 05:54 PM

If it’s one you have to maintain by adding oil, cleaning filter, etc it could be a bit of extra work to get to it.

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4045 posts in 1622 days

#2 posted 02-10-2016 05:57 PM

They put AC units in crawl spaces, so I don’t see why a compressor wouldn’t work. Are you talking about crawl space under the house or in the attic? If up in the attic, depending on the construction of your home, you may have vibration issues (as well as sound issues) that might cause problems with the finished ceiling.


-- Brad in FL - To be old and wise, you must first be young and stupid

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7383 posts in 1430 days

#3 posted 02-10-2016 06:02 PM

Just make sure you can get at it easy enough to drain the water and/or service it when necesssary

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1871 posts in 2114 days

#4 posted 02-10-2016 06:03 PM

How easy is it going to be to get to it to drain the tank? Most crawl spaces aren’t that big.

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4827 posts in 2237 days

#5 posted 02-10-2016 06:10 PM

I drain my tank daily, so it wouldn’t work for me.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View dhazelton's profile


2294 posts in 1720 days

#6 posted 02-10-2016 06:36 PM

You can do whatever you want, but I would be worried about critters chewing on wires and hoses and making nests where they don’t belong. I also imagine it might be really damp under there.

View xeddog's profile


108 posts in 2431 days

#7 posted 02-10-2016 06:55 PM

Crawl spaces are ventilated too, and there COULD be some issues with moisture. I don’t think I would out one in there.


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60 posts in 1446 days

#8 posted 02-10-2016 07:01 PM

Thanks for all the replies.

The tank draining issue is the biggest one that I can think of. Luckily, where I would put the compressor, the crawl space is about 7 ft tall and has almost a normal size door. That being said, it still will be a pain to go in there to drain it regularly.

I also thought about the moisture problem. We do have plastic down to act as a vapor barrier, but it is vented to the outside, so I probably would get more water in the compressor than I am getting currently.

View bigblockyeti's profile


3587 posts in 1144 days

#9 posted 02-10-2016 07:07 PM

Sounds like a good idea to me. I would plumb full tank pressure to where ever you’re using air and regulate it at that point so as to not have to go into the crawl space to adjust the regulator for varying applications. You can get an automatic drain that will open for a user specified time and a user specified frequency for less than $100 so you’d have to lay eyes on it very infrequently. Turning it on and off should be made possible remotely so it doesn’t run unnecessarily if there’s a minor leak, or if someone is asleep above it.

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3979 posts in 2394 days

#10 posted 02-10-2016 07:10 PM

Put an automatic drain on it.

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2294 posts in 1720 days

#11 posted 02-10-2016 07:14 PM

7 feet! You could put the compressor on an elevated and insulated box that hung from the rafters, or was freestanding. Remove the bung from the tank and take it to HD and I’d bet you could get fittings and piping to make a long remote drain that runs to outside where you could reinstall the bung and petcock. You’d have to factor that volume of air into how long it takes to cycle back up, though. You’d still have to go down there to adjust output pressure though. Get a cat to handle the mice.

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334 posts in 1570 days

#12 posted 02-10-2016 07:16 PM

7 feet?? Hell, I’d make a shop out that space!

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60 posts in 1446 days

#13 posted 02-12-2016 10:03 PM

Well, when I say 7’, it goes from 7’ to 3’ in about 13 feet, so it really wouldn’t be usable as a shop. I sure have thought about it though.

I will look into some sort of automatic drain. Thanks again.

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101 posts in 2553 days

#14 posted 02-12-2016 11:14 PM

I’d put my compressor in there. With that Radon barrier/vent, humidity should not be a problem.

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2302 posts in 1832 days

#15 posted 02-13-2016 04:26 AM

You can use pipe to make the drain go where you want and then terminate it with a ball valve that you can access easily. Or build a small lean to against the house/shop and do the same. I had mine in what looked like a dog house for years until I added onto the shop and planned for the compressor to be in a separate “closet” with decent access.

-- Live to tell the stories, they sound better that way.

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