Need the best range hood for a 6' duct and 60k BTU Range
superdork21
13 years ago
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Comments (9)
lascatx
13 years agoRelated Discussions
need under cabinet range hood - "Best" by Broan?
Comments (15)Stainless from all brands matches pretty well. Stainless will never look exactly alike appliance to appliance, even within the same brand, since different appliances are made from different rolls of stainless and often come from different factories. Also keep in mind that most appliance manufacturers do not make their own hoods anyway; they buy them from different ventilation manufacturers like Best. It is possible you could get the exact same thing as the above if you bought a Wolf hood (not sure who is making theirs now)....See MoreWhat do I need to know to install a ducted range hood
Comments (8)Concerning more ventilation: Most of the time it's fine. I don't mind cooking smells in the house. I've never cooked fish or something with strong unpleasant odors. The only times I really want more is when I'm sauteeing onions or searing steaks and I get smoke going. I turn it on in those cases but it doesn't even have enough pull to really pull the smoke up to the vent if that makes sense. Also I have greasy build-up on top of my cabinets. I had no idea that a fan was even suppose to be used for greasy things (can you tell my mom never used hers either), so now that I know a fan could help with that it would be nice if I had one that worked better so I didn't have to scrub the top of my cabinets every year. As far as current venting goes; if I had any it would have to be in the existing wall, nothing goes through the cabinet over the stove. Also there is nothing on the roof or side of the house that indicts anything being vented anywhere in this area of the house. Weedmeister, after reading your message I realize I was incorrect in my thinking of where the duct connects to the hood. I was thinking they would connect to the back side of the hood (where it touches the wall) but after reading this I think you are saying the duct will connect above the hood. Is that correct? In that case I'd have 2 turns in either direction (one from the fan to the wall and one from the wall to go up or to the side. I'd definitely want the vent in the wall because I have a huge open space above the cabinets up to the cathedral ceiling and I wouldn't want to see a vent running there. Thanks for helping me clarify this stuff. More and more it sounds like going ductless might still be my best choice. The filters on them were rather expensive and I was starting to think maybe over the long term that just installing the ducting work would be cheaper than replacing all those filters. So if I'm going to install a ductless hood, does the CFM's matter so much. I was considering the Broan Evolutions QP130 or Broan QP230 hoods....See MoreRange Hood over 36" 6 burner gas range top
Comments (18)All hood filtering, whether meshes, baffles, or VAH sling designs, can only remove part of the grease aerosol particle spectrum. This part is that of the larger diameter particles, with decreasing performance through the mid-range. The rest is hoped to be discharged into the atmosphere, but there will be some collection in ducting depending on various factors. The only system I know of that can handle the entire spectrum is the intense UV approach used above commercial perforated ceiling collection designs. Hence, discharge into an attic not only subjects the attic to grease, water vapor, and odor, but could potentially be a fire hazard. Is there a reference somewhere in which VAH specifies that attic discharge is allowed? Earlier, the value 90 was raised. That may have been a misapplication of my expressed opinion on the flow rate (cfm) desirable per square foot of hood aperture to ensure that the 3 ft/s rising effluent from hot sources (griddles, woks, etc) is assured of containment by baffles and meshes. Rules of thumb such as cfm per BTU/hr or cfm per foot of hood edge are derived from various assumptions about the nature of the cooking field. kas...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 Moresuperdork21
13 years agoJ M
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