duct through chimney to attic?
SanM
9 years ago
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ionized_gw
9 years agoUser
9 years agoRelated Discussions
Chimney hood w/ rear duct? OK I know this may
Comments (12)As I understand it, you want a range hood that mounts to the wall and has a matching chimney that goes up to the ceiling, although you want to vent out through the wall. This shouldn't be a problem. The square or rectangular chimney that you see on most chimney style vent hoods is just a decorative enclosure, boxing in round ducting inside. Most of the decorative enclosures are open at the back and attached to the wall with a bracket of some sort. The interior ducting then goes up to the ceiling, and out through the attic and roof. The enclosed ducting could just as easily have a 90 degree elbow and go out through the back wall, terminating on the other side of an exterior wall. Take a look at the drawings shown at the link below. This is for a Miele chimney-style hood, but other brands are similarly designed. As you can see, the chimney enclosure is open at the back and attaches to the wall with a bracket. The ducting inside the enclosure can go up through the enclosure to the ceiling, then through the attic, or it can turn and go through the wall. The model shown is also available as a ductless model, which while not recommended, is another possibility. Here is a link that might be useful: Miele Chimney-style hood schematic...See MoreCan I duct through my chimney?
Comments (8)You cannot duct into a chimney, but you can run ducting through the chimney as a sort of soffit that contains that ducting. Ducting for range hoods needs to be rigid smooth metal so as to avoid grease buildup. Even if you have a terrific range hood with high CFM and an excellent filtration system, the air that passes through it will still contain lots of microscopic grease particles that can attach themselves quite easily to a rough surface like masonry. Then they build up. That's a fire hazard. It's a particularly nasty fire hazard if this is an old fashioned non lined masonry chimney that already has it's own buildup of creosote from being used as a wood fireplace....See MoreCan I run kitchen exhaust duct up through 2nd story wall?
Comments (19)This has been very interesting as I have the same predicament. It's not really encouraging me to rush into doing this. Fortunately I don't do much of any greasy cooking and I have a nearby external exhaust fan in my laundry room to suck out odors. The biggest concern is moisture wafting up on the cabinets but aside from sticky grime that I cleaned off from previous owners, the cabinets are in fine condition even after 15 years without external exhaust. What I have been pondering is if I could somehow connect into that laundry duct work through the attic as I don't really need an exhaust fan in the laundry room....See MoreShould bath exhaust fan be vented to roof RIDGE VENT through attic?
Comments (11)Happy to help. I've had a bit of this work done myself, in two different houses. In one, I had a Fantech BFRK 100 installed. There was an existing bathroom exhaust fan that worked poorly but I didn't want to put in a new grill. With the BFRK, you take out the guts of the old fan, keep the housing in place, and then connect ducting that runs first to the Fantech unit located a few feet away up in the attic and then from it to the roof passthrough. I had that done by an HVAC contractor who was on site replacing HVAC equipment. I'm not sure they would have done the work otherwise, it was like a favor to me. The second one was the replacement of a 20 year old exhaust fan with light in a WC closet that was noisy and ineffective. I had that done by an electrician who also was doing other work. He needed to go into the attic to remove the old unit, connect the new one to the framing, put in a new duct and connect the power. It made a huge difference. That one also vents through a roof pass-through, important because we use it to vent the bathroom of moisture from showers and baths. Good luck and keep your BS detector handy. If other exhaust vents terminate in the attic, it's time to fix those too. Each duct run needs its own roof passthrough unless you're using a Y setup with one fan at the base of the Y for two locations. Be careful if so, those can be tricky if the duct runs from the rooms to the base of the Y aren't of equal length. As far as duct run distances go, the unit will specify the maximum distance. For my most recent job, the ceiling unit with light that was 110 CFM, I want to say the spec for the duct run was something like 60 feet. I wrestled with putting a wall vent on a gable end but decided to stick with the existing through-roof vent....See MoreSanM
9 years agoionized_gw
9 years agoSanM
9 years ago
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