Question: Did contractor put in Range Hood Vent backwards?
Lisa Smith
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last yearlast modified: last yearLisa Smith
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Fitting Range Hood Duct to a smaller vent Hole Opening?
Comments (53)That is irresponsible of your builder and is a warning sign about their knowledge, quality and integrity. Reduction from 8" to 6" alone is a problem. It will reduce air flow and so the effectiveness of your hood and it will increase hood noise as well as the amount of electricity used. So increased cost, more noise, less odor, gas combustion by-products and other effluent removal. Flex duct creates two problems; It's a major fire hazard and it increases static pressure (reduces air flow). From a static pressure standpoint 6" flex is roughly the same as 4" rigid in most installations. At a MINIMUM you should have 8" rigid for your entire run if that is what your hood calls for (Many US hoods undersize this). If you have many bends then you should increase that to 10" to keep static pressure down....See MoreVenting of Range Hood Dilemma
Comments (4)If you don't have proof that you sent the specs to the GC, ask him to show you the specs that he did use or show you where he found the 21 1/2" maximum height recommendation. Don't let him tell you that he could use any height he wanted in the absence of instructions from you; he should have asked. Vent-A-Hood says the recommended mounting height for their under-cabinet hoods is 21" to 24". For their wall-mounted hoods they recommend a maximum of 30". They also say that exceeding the maximum recommended mounting height may compromise performance. A range hood is not a gas appliance vent but an exhaust for cooking vapors, so there is no code requirement to have one and the installation height is entirely optional. Some homeowners are tall and prefer a hood mounting height greater than 30 inches and are willing to give up some cooking vapor exhaust performance. (I think of this every time I hit my head on the sharp corner of my brother-in-law's hood.) Therefore the height of a range hood should not be determined by the maximum recommended height in the installation instructions but by the design documents. So, the GC should have asked you what height you preferred regardless of what manufacturer's installation instructions you gave him. If the GC designed the house and prepared the construction documents, perhaps he thinks he has your permission to make such decisions on his own....See MoreVent-A-Hood Ductless ARS range hood Update
Comments (198)With conventional hood systems, the expectation is that the larger particles within the entire grease particle spectrum are collected by the baffles, and the smaller particles are ejected into the outside air, with only modest condensation or impact collection by the duct. To deal with the entire particle spectrum with a filter pack is a challenge, and probably unaffordable in cost for most residential users. If the Amazon rating is based on comparison to outside venting, the result above might be reasonable. As a commercial example, the Wells WVU-31CT filter system is described below: "Filtration Completely self-contained filtration process reduces emissions below that allowed in NFPA 96 and ANSI UL710B using the EPA 202 test method and includes stainless steel grease baffle filter with grease cup, fiberglass pre-filters, high-efficiency (Particulate Air) filter/ carbon-charcoal filter pack. All filters are easily removable with out tools. Air flow sensors continually monitor air flow optimizing performance and grease removal while an interlock system will not allow cooking appliances to function if filters are missing, clogged or in the event of a fire." About $18k. Electric surfaces only....See MoreHVAC guys didn't place a vent for the range hood!
Comments (6)Thanks for the input guys. I really appreciate it! Yup, we are actually in the punch list stage. Cleaners and painters were there. Just had to get the trim kits placed on the refrigerator/freezer and done. This happened to be the only hitch in the whole 2500 sq/ft addition project. I have a feeling it was the 9000lb elephant in the room that nobody wanted to address and was not noticed until the cabinets and countertops were set. A HUGE hitch if you ask me, but, everyone we have used has been top notch and have addressed every issue we have come across. Talked with the GC today, and my idea was the best solution. We are going to remove the siding on the exterior wall, place a 2x6 fake wall adjoining the existing studs, sheet, reside, and run an insulated chase to avoid any type of condensation issues. This solution would also cover some of the masonry issues we had joining the addition to the existing brick wall and brick patio on the porch. Some of it was chipped up, and the brick wall was needing a patch job. All in all, I think it will come out great. The other solutions of having just a chase punched out and run along the wall outside in the covered porch area would look rediculous, and a ventless hood was not going to work for us. Thankfully, this is the only place where this type of extreme solution would work and nobody would be the wiser. If that range and hood was on any other wall, we could have just punched it out and placed a vent. We didn't want all those fumes vented to the front porch area. I'll post some pictures tomorrow. You guys have to see the "White Princess" quartzite countertops my wife used. I'm ready for this project to be DONE! Nocode...See MoreUser
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