How to change from downdraft exhaust stove to hood exhaust?
Margaret Manneschmidt
2 years ago
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Is a vent hood or exhaust mandatory?
Comments (45)I'd like to add my (civil) 2 cents: TexasCatherder has a good question, and there are many right answers here. - Do you "need" a kitchen range vent? Yes, in most jurisdictions using international building code, some kind of kitchen ventilation is required. If you don't want it, don't put it in. But it may haunt you upon inspection at resale of the home. - No, few jurisdictions require a big ole' "range hood" over the range. In my community, it just needs to be some kind of vent that can circulate the right number of CFMs for the space. For example, a friend recently renovated her kitchen; she didn't want a big hood over her range in the island; and according to code, she went with a small wall-vent on the other side of the room on an exterior wall. That's enough for the "needs" of code. - But yes, like many have noted, a range hood does a better job of capturing grease and moisture than a wall vent. I'll bet my friend's lovely white kitchen wall gets a grimy film around that wall vent in a year or so. - Besides grease and water vapor, yes, gas-fueled heat sources produce toxins. It's not enough to kill or annoy most people, but the cumulative effects of the toxins isn't good, and those who are sensitive to allergies may suffer, and it's generally not a good idea to burn stuff (including chicken or toast) without ventilation. - Ventilation is important for indoor air quality and the structural integrity of the home. One thing that we recently became aware of is the need for ventilation just to get rid of moisture. If you have a well-sealed and insulated home, every-day water vapor from cooking, cleaning, bathrooms, laundry, etc. can build up and not escape the house. It can cause condensation inside walls and windows, which can lead to mold, which is a major indoor air quality issue in our part of the country. Additionally, although it doesn't seem logical at first, it can lead to structural problems. Air in a home circulates from colder regions to warmer regions, and the moist air goes with it. There's a photo in a an old-house-renovation book we have that shows rotting roof rafters in an attic: Rotting not from a leaky roof, but because of long-term water standing in a basement and crawl-space! It was three floors away -- how could that be? Air circulation moves the moisture up. - Anyhow, it sounds like our dear OP TexasCatherder got the point that ventilation is important. So maybe we can help her now focus on where to put it? Rather than debating the pros and cons of ventilation, perhaps we could start a new thread to help her with layout? She's going to have a beautiful kitchen, and folks here are great at taking the cook's priorities and giving suggestions for layout to help reach those goals....See Morehow to go from otr mw fan to range hood exhaust?
Comments (9)The easiest way for them to run duct in a two-story house is between the floor joists in the ceiling above. Well, the easiest way is probably to run through upper cabinets, if you have them. You need to figure out which way those ceiling joists run - look in an upstairs register or at the joists in the basement or attic to get a good guess. If they go the right way your ducting could go up from the hood to the ceiling, turn a right angle to go between the joists, and go out through the wall. We had a guy from a fireplace shop come and look at our house. He had good suggestions for how to get to the outside from an interior wall, and it wasn't what we thought it was going to be, mostly because the joists ran in an inconvenient direction. We were ballpark-quoted in the $1000 neighborhood to go completely across the top of the kitchen and out the opposite brick wall, plus a second run of duct in another place, through another brick wall, for make-up air (required for a 401+ CFM hood in our area). I believe if we only had to do the single run, it'd have been about half that. Material costs are very low and the hard work in our case was getting through the masonry. Note that our estimate did not include patching up the ceiling after they cut a bunch of holes in it. We also have a recirculating microwave-hood and we hate it. The diffuser piece at the top on ours has broken so I get the breeze right in my forehead as I stand at the stove. We can't wait to have a proper outside-venting hood!...See MoreDowndraft exhaust - retrofit to kitchen peninsula?
Comments (13)I have that exact Thermador downdraft model paired with a Thermador induction cooktop. It works surprisingly well but, of course, not as good as an old fashioned overhead hood. However, it works much better than the downdraft that was built into the Jenn-Air cooktop that it replaced. I'm sure you are aware of this but the blower is purchased separately so you need to account for it when calculating your total cost. I do not use the recirculation module as my house was built for a downdraft and was piped to vent down into the floor and then out the side of the house. When it was first installed it vibrated very badly except at the highest speed. After having Thermador out a couple of times we determined it was a faulty blower, it appeared as though it must've been dropped or suffered an impact of some sort prior to installation. They replaced it and all has been well since. I was very happy with the support I got from Thermador. I don't know anything about the Cattura but I do like that it has a built-in light. The Thermador does not have a light and there are times that I wish it did. Also, I like the look of the electronic controls on the Cattura. The Thermador has a simple analog knob with low, medium and high settings that you push to raise and lower the unit. It also looks like the Cattura is taller. The filters on the Thermador are designed to be just tossed into the dishwasher and reused, which is nice, whereas it looks like the filters on the Cattura need to be replaced every 3 to 6 months. I've never seen or heard of the Cattura so I couldn't tell you if the build quality and performance is on par with the Thermador....See MoreDowndraft exhaust ineffective...what should I do to replace it?
Comments (4)You will inevitably hear people suggesting a full redo -- Houzz doesn't like stoves in islands. And venting is just one of the reasons. But if you don't want to do that, there are pretty decent overhead hoods that can vent through the roof. And this is possible even if you have cathedral ceilings. I suggest you post both photos and to-scale drawings of your place. You'll probably get better advice that way. Also, let us know what your budget is, what you would like to replace your Jenn-Air with (if that's getting replaced at the same time), and what is important to you when cooking....See MoreMargaret Manneschmidt
2 years agoMargaret Manneschmidt
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