Another 8 ft ceiling question (chimney range hood?)
secondhalf
11 years ago
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secondhalf
11 years agoRelated Discussions
Chimney Range Hoods for 30" range
Comments (13)Needinfo1 - what Tom meant by recessed is a canopy hood. I.e. don't buy one of those flat hoods, even though they look cool. Also, the curved glass ones aren't so great. A canopy hood will capture best the rising smoke and grease. To the OP, a 30" hood will be fine. The hoods that are 36" wide over a 30" hood are the ideal, but so many of us cannot afford to forego the upper cabinetry for the 36" width. You should get a hood that is not a skimpy depth of 20-22". Those won't cover the front burners. As Tom said, a 24" depth hood would be good. Your question about 600 cfm vs. less cfm: it is better to have the 600 cfm, even if you don't use it that often, say, for searing steak, than to have an underpowered hood, and have to have it on its highest setting all the time. You'll have less noise if you can run your 600 cfm hood at medium or low, and still have the hood be effective, than if you are running your 400 cfm hood on high all the time because it is underpowered. Make sure your exhaust duct is sized properly. Most hoods specify an 8" or 10" diameter duct. There are some hoods that allow a 6" diameter duct, but they're harder to find. The problem with pushing too much air through too small of a duct is that you will get increased noise and decreased efficiency though no fault of the hood. So check your exhaust duct size (if already installed), and match your hood to it, or if still in the construction stage, install the right-sized duct....See MoreNeed a slim chimney 30" island range hood or another option,.
Comments (8)how about one of these? They don't all have slim ducts - which you probably won't find in a functional one b/c you need a minimum duct size - but they are decorative or seem to be less conspicuous than some I've seen. http://www.broan.com/products/product/8ece5293-7620-4a8f-9251-b4d328e7abe7 http://www.broan.com/products/product/2d0c240c-f0af-46a3-988c-2655557c64c0 http://www.ajmadison.com/cgi-bin/ajmadison/CTPE48BSX.html (a bit expensive, though!) http://www.ajmadison.com/cgi-bin/ajmadison/ISSTREAMWHT.html http://www.ajmadison.com/cgi-bin/ajmadison/IS36JUPITERGLS.html...See More8 ft ceiling and 36 in hood in an island?
Comments (19)Hi S, You're ahead of most that post questions - you hired an architect and the plans are professional. How refreshing! That said you have not posted the reflected ceiling plan to see how the vaulted ceiling is in relationship to the kitchen. Also you should post some images of that area to additionally fully grasp the existing condition. I come from a 4 year degree in interior design with a minor in architecture, as well as years, of experience with construction in all areas of design. Yours is an architectural/interior design question not a decorator question. The plans you posted are easy to read BTW. Also sometimes an existing condition can be a pain that impacts the plan to not be 100% ideal but other times it can create an unexpected opportunity that is unique and actually offers an interesting/great result that would not have happened in new construction. But without the full picture no one can truthfully call it....See More36 inch range hood 6 vs. 7 vs. 8 inch duct?
Comments (16)vinmarks No, in your case I was tempted to write that the VaH can make use of that size duct. I think VaH may be negligent if they don't point out that that duct size needs to be matched on the MUA side. As pointed out earlier, few in the kitchen hood sales chain want to raise the issue of make-up air and the horror it can be to retrofit into a renovation.* But lest others think that they need 12-inch duct for 1200 CFM with conventional blowers in lieu of using 10-inch for typical lengths, I wanted to point out that that would be only a modest improvement relative to getting the MUA in with low pressure loss. Pressure loss is counted from the cooktop to outside and then from outside to inside back to the cooktop. ------- *An example MERV7 high flow 4-inch deep pleated filter, 2 ft x 2 ft in area used to catch the big particles and bugs that the MUA air could pass into the house, used at 1200 CFM (300 ft/min) would have a pressure loss of 0.1 inches w.c. (See table from https://www.texairfilters.com/comparative-tests-on-pressure-drop-of-hvac-filters/ If one looks into VaH data, for example see below, 0.1 inches w.c. drops the flow rate of a dual blower (1200 CFM) hood to 1060 CFM. At 1060 CFM, the filter pressure loss is a bit less, so one really needs to plot filter loss vs flow rate against the fan curve implied by the data below to obtain the expected flow rates (excluding ducts, MUA register, and exhaust duct cap pressure losses which also need to be counted) . And for comparison, using an equation I found on the Internet at the HVAC engineering forum referencing the 2003 ASHRAE Handbook at Page 52.5 (confirmed in my copy) and adapting it with some trepidation to screening as was done at the forum, and assuming a screen of 70% openness across a 12-inch duct at 1200 CFM, the pressure loss is even higher than the pleated filter, reaching 0.7 inches, w.c. With a 15-inch screened duct, 0.1 inches w.c. at 1000 CFM could be achieved. The moral is, use a lot of screen area, or low loss filtering, or let the sparrows in....See Morebadgergal
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