Can't Vent Kitchen Hood in Cold Climates?
mtpam2
12 years ago
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live_wire_oak
12 years agoRelated Discussions
Hood Vent Covers that work in cold Climates
Comments (3)Well, I spent a bit of time searching the web and found out I have a Broan 643 wall cap, or something just like it. I also found out there isn't a whole lot more out there in an 8" size. There's got to be something better than what I have now. Anybody? Thanks!...See MoreKitchen Hood - Cold Air?
Comments (2)Your damper might be open or missing. When my dh installed our hood, he had to do some squeezing to get the 10" pipe through the trusses. So the vent system wasn't exactly round in the location where the damper is supposed to go. So, he never got back up there to install the damper. It's on "the to-do list". I do feel a slight wind when it's really cold outside....See MoreDo you get a cold draft through your vent hood when its off?
Comments (8)The installation instructions that came with our vent had the following instructions: COLD WEATHER installations should have an additional backdraft damper installed to minimize backward cold air flow and a non-metallic thermal break to minimize conduction of outside temperatures as part of the ductwork. The damper should be on the cold air side of the thermal break. The break should be as close as possible to where the ducting enters the heated portion of the house. I made sure the installer put both the additional damper on the outside and the thermal break. We do not have a cold draft from the vent....See MoreWhat type of vent hood when you can't vent outside?
Comments (7)My original issue with VaH (a decade ago) was their specious CFM claims that did not provide any "fan curve" information that would allow one to calculate actual CFM given some duct losses and MUA losses. More recently, I have seen some appropriate data published for their ducted units. However, checking just now, I see that they provide "n/a" for CFM for a representative ARS model. This is unconscionable. The ARS, being a closed system, has a volumetric airflow rate unaffected by exterior effects. They need supply only one easily measured number. How would one know if the flow rate is suitable for a particular cooktop / cooking style without knowing the specific (CFM/sq. ft.) flow rate of the hood? Given time and budget and no access to a residence exterior, I would probably research commercial solutions to this problem and adapt a filter to a conventional hood and blower. Sheet metal shops can easily build the needed "duct/filter" structure. On the plus side, recirculating systems do not need heated MUA and thus are more energy efficient. They avoid having a lot of house, basement, or attic space taken up with a powerful MUA system. On the negative side, for a given hood entry aperture flow rate, they will be noisier than an external blower with intermediate silencer....See Morekaseki
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