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Vent heights for a two pipe sidewall
Hi, Its been difficult to find a discussion online on accumulated snow and vent height. Do both pipes need to be over 30 inches which is what I have on one pipe. The other, exhaust pipe is just a foot off the ground. Two vent systems aren't mentioned but maybe implied here. I'm going with thirty inches for Des Moines, Iowa. These are two inch pipes. But, ok, for two pipes which pipe needs to be higher the intake or exhaust? Here's a photo attached of what I have. The intake pipe plugged with frost when it gets to -9 and below probably because of the warm moist exhaust rising. Of course the the furnace shuts off when it's starved for air because the intake pipe is plugged up. Guess which is the intake pipe? The taller 2" pipe! I think these are reversed. What do you guys think? And is that low pipe too short, I mean should it be around 30 inches or taller? Thank you.