Why does a pipe vent need to go out of roof?
compiler
12 years ago
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compiler
12 years agorenovator8
12 years agoRelated Discussions
How high does range hood vent pipe need to be to meet code?
Comments (5)Your contractor has no clue what he is talking about. Building and Mechanical 'Codes' do not address residential range hood installation requirements...and instead defer back to the manufacturer's installation instructions for vent termination heights and clearances in cases like these. Your contractor obviously did not read those instructions. So find a new contractor who can read them, and install your range hood duct termination as it was intended to be installed....See MoreWhy is this roof pipe capped?
Comments (6)It's a talking tube that was installed by the GC for workmen to use during construction. Instead of yelling from the roof,workmen can just speak in normal tones and those inside house hear them clearly. Congress allocated 14 billion dollars to and passed the construction site noise abadement bill in 2004 requiring construction sites to cut noise level 17.8% by year 2022. Only a few smart general contractors have requested their allotment from the 14 billion so far and that's one reason the tubes arn't showing up on more new homes. Another reason the tubes aren't more common is the law alows tubes to be removed or capped once the home is complete and inspectors sign off on it. Please don't ask how i know it isn't in case an induced draft gas furnace or additional bath is added in the future. At any rate removing the cap to satisfy the inspector and buyer seems easy enough,why sweat it?...See MoreRoof Vent Pipe- Can bugs get into them?
Comments (2)Let's clarify what your vent pipe does-is it a vent for your kitchen sink (plumbing), or some other vent-HVAC, dryer, etc.? Plumbing vents should NOT have water in them as their purpose is to prevent vacuuming the water seal out of sewer gas traps when flushing, draining etc. That liquid seal will prevent most insects from house entry. I say most since some larvae can hatch after being laid in such conditions. If you are going to screen them, the screening cannot reduce the vent area. The seal between vent and roof/wall penetration (usually a boot or flange) should be maintained. The best construction is strategic flashing. If caulk is used, remember it has a short service life. Trying to keep the organic matter off the roof will help minimise insects looking for a meal or building material....See Morerange hood duct: straight up to roof or vent out of wall
Comments (8)For the wall vent option, also consider the proximity of operable windows. Codes vary by locality, so you should probably call you local building inspector for clarification, but in my city in Northern California the vent must be >=3' from any operable windows. Folks above are correct that 90s in ducts result in pressure drop, but you're talking about a short run with a single bend, and you could always run a slightly larger duct if you were concerned about it, so I don't think the pressure drop from the single turn is a significant consideration because it's gonna work well either way. Primary considerations are: cost to install, how it looks, if smoke will find it's way back into house or otherwise annoy outside....See Morebrickeyee
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