quiet and powerful 36" range hood insert: does your kitchen have one?
feisty68
8 years ago
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feisty68
8 years agolast modified: 8 years agoRelated Discussions
Quiet & powerful range hood
Comments (12)Hi Laura, I have to second Best by Broan. I have one above a 36" Wolf. Like Aliris, I have an inline blower-- in the middle of the pipeworks up in the attic, removed from the kitchen, but I don't have a silencer (it was very quiet without one). Best by Broan was a great choice, looks great. The external blower (rather than the inline blower in the attic) would've had to be mounted to the roof in my case. This makes it hard to find repairmen (at least in my area). Be sure to use rigid (not flexible) piping. This is code, but some builders use flexible piping, which is a fire hazard and contributes to noise. Good luck!...See MoreQuiet insert hood
Comments (2)We are also looking for a quiet insert hood to be used with a wood hood over a 36 inch induction cooktop. However we are leaning towards the GE Monogram 36 in induction cooktop. Some one on this forum had a Sirius hood over an induction cooktop. Sirius web site shows two insert hoods. Look under the Power Pack tab...See MoreCombining 2 smaller range hood inserts into one large hood.
Comments (17)At the moment, I would call them concerns pending further information. First, do you have any combustion appliances connected, air wise, to the kitchen? Combustion appliances include furnaces, hot water heaters, and dryers. If they all have their own make-up air sources, then they don't count. Fireplaces count unless roaring hot and quite large, in which case they need their own make-up air even without any kitchen ventilation effects. One of two windows cracked open a couple of inches will perhaps achieve adequate make-up air for a quite low CFM requirement in lieu of wall cracks and other dusty paths. Bathroom exhausts and dryer vents should have dampers that will not allow enough MUA for any purpose. Gas fireplaces are required to not have dampers, so only the doors limit back-drafting. That is also an undesirable path. 300 CFM, for example, is 5 cubit feet of air per second. This would require more than a couple of inches of window, even if unscreened, to avoid an undesirable pressure drop in the house when combustion appliances are present. It will certainly degrade the flow rates of the kitchen ventilation blowers, more so with VaH squirrel cage blowers used in Magic Lung systems. What are the claimed CFM of the VaH inserts you are using? (Zero static pressure values not Magic Lung claimed equivalent values) What is the area (or dimensions) of the air intake aperture at the bottom of the hood assembly containing the inserts? Is there some overhang of the overall hood relative to the entry apertures of the inserts?...See MoreDo you have a 42" range hood insert that you love?
Comments (6)You should be aware that for a given blower size, fan blade tip turbulence will always be noisy and likely dominant at full CFM, with baffle hiss secondary. The blade tip turbulence noise can only be quieted by (a) an in-line silencer between blower and hood (not practical in a short length of ducting) or (b) a larger blower operating at partial power (won't fit in hood so it has to be outside). You will need to plan this carefully so all interfaces (duct and electrical) are fully functional. Wolf answers their phone and may be able to suggest practical combinations of stuff they supply. Modernaire may also be able to address the issue with some combination of stuff. Hood and blower from separate sources will require some understanding of how you will control the blower from the hood with its control, or whether you will go for a wall control suitable for the blower. Note: 2 ft x 3.5 ft is 7 sq. ft. of hood aperture requiring 630 CFM for hot cooking. A blower for this should be in the 900 -- 1000 CFM category to achieve this consistent with your plan. If you used a 1200 down-roof (also down wall), such as Wolf, Broan, or Abbaka make, and dial it down to your cooking level, it might be adequately quiet. Noise increases as some power of CFM so a modest reduction from full power may be enough....See Morefeisty68
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