The Thermador insert range vent I want needs 10 inch duct.
Paul F.
last year
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Verbo
last yearPaul F.
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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 MoreVent hood: 48 inch range, 54 inches of space to fill in
Comments (4)The hood aperture should be larger than the range. The blower fits inside the hood or on the roof. A blower larger than the hood size would apply to some industrial application. For an "insert" configuration, working from outside to inside, the order of assembly is wood cabinet, hood insert, containment volume that is hooked to the ducting. The blower may be in the containment volume. kas...See MoreBest vent insert options for 6' duct work - please help!!!
Comments (2)If you can install a remote "in-line" blower, a fan motor that sits not in the rangehood but somewhere in the duct that goes to the outside, usually at the far end of the duct, say in the attic just inside the opening to the outside, you should look at this website: Fantech.net. They have a line of in-line motors, and you might find one that will work for you. They have one that can be installed in a 6" duct, and its cfm is about 480. If you need more than that, get one that can be put into the rectangular duct you described....See MoreRange hood insert for limited ducting space needed
Comments (11)Shari-- I don't entirely understand your layout/space issue either, but if you can swing a blower that's farther away from the kitchen I'd definitely suggest you give that a strong look. We bought and installed a 42" Zephyr Monsoon vented strait up into the attic and and then at a slight angle to and out the roof, but we found it so aggravatingly loud even on the lowest setting that we replaced it with a Wolf liner, inline silencer and Abbaka roof mounted blower. During this process I downloaded a decibel app to my phone, and the Abbaka setup (1400 cfm) is quieter on high than the Zephyr was on low. Despite the bitter pill of having to buy two ventilation systems, we're very happy we switched. Wolf literature shows the liner is 12" tall, and I'm not understanding why you can't attach an elbow to the top of that that turns where you need it to at 22". Wolf isn't the only maker of liners, so you can shop around--I like the fact that it has a variable speed control rather than pre-sets like the Zephyr, but I've discovered it doesn't have a grease collection reservoir which seems like a strange omission....See MorePaul F.
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