||12-23-2011 12:48 AM
slope for furnace intake pipe?
I am finishing a basement and the intake/exhaust pipes for my furnace hang down more than I want. The pipes are sloped and I'm guessing its to direct the condensation back toward the furnace to a drain pipe that is attached to the intake pipe. I would like to raise the pipe a bit to get them above a drop ceiling. My question is, how much slope do I really need? The span is about 15' and the pipe is hanging down roughly 4-5" from the joist at one end and tapers to touching the joist where it exits the wall.
||12-23-2011 04:27 AM
1/4" per foot. So 15/4=3.75 inches of slope, min.
||12-23-2011 06:40 AM
if you raise the pipe, make sure you raise the whole pipe not just one end....you may have to make a new exit hole.then apply what beenthere said at a min about 3.75 inches of fall toward furnace...
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