PVC Intake/Exhaust for Furnace


Old 09-03-03, 12:50 PM
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PVC Intake/Exhaust for Furnace

We have a new 90%+ efficiency furnace with the PVC intake/exhaust pipes on the outside of the house.

I have worries about the open end of the PVC piping (we have bees that tend to build nests around our house, and I caught my 2-year old trying to throw a rock down the pipe). I was considering adding a piece of screen over the open end to avoid such problems.

Is it common/OK for people to do this? Is there a recommended material?

Thanks in advance for your help!
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Old 09-03-03, 05:43 PM
hvac4u's Avatar
Join Date: Aug 2001
Location: NW atlanta
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put a mesh screen across it

most units are shipped with a pvc screen insert just for this. we call them birdscreens
Old 09-04-03, 12:46 PM
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The inserts for downspouts work great.
Bulb shaped with the long prongs to hold
in the opening.
Old 09-08-03, 07:52 PM
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Location: Rochester, Minnesota
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I wouldn't suggest a screen on the intake if your area has a foggy late winter season.. The fog tends to freeze on to the screen, and close up, and shutting the furnace down.. I've pulled a few too many here in Minnesota.

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