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Questions tagged [vent]

For questions generally relating to the exhaust ventilation of air from inside the home, and/or methods to promote proper airflow thorough various spaces in a structure.

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Flexible duct behind dryer looks a little sketchy

So we just noticed that the air flow in our house is always bad when we run the dryer. Looking behind the unit, we found a foily looking mess of a flexible duct behind the dryer. It looks almost like ...
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1answer
18 views

Restrictions on 90 Degree Elbow for a Bathroom Exhaust Fan?

The manual for a certain (100CFM/4") bathroom exhaust fan has a restriction on using 90-degree elbows close to the unit. Why is this? Is it okay to use 90-degree elbows further down the exhaust path? ...
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2answers
29 views

What Type of Ducting Should Be Used for a Bathroom Exhaust Fan?

I'm planning on installing a Bathroom exhaust fan (Just a note, the port is 4") and am curious as to what kind of duct should be used. I've heard that the duct should be insulated to prevent water ...
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1answer
37 views

How much clearance do I need above a floor vent?

I am building a custom shelving unit that will sit over an inconveniently located floor vent/diffuser. My thought is to raise the bottom shelf up on stubby legs so that it does not block the vent. The ...
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23 views

Ventilation duct work

I have 4 15.75" Dia. ducts being combined into one vertical duct. How do I size the vertical duct? We commonly just go with area of ducts.
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1answer
32 views

Making your own B Vent Attic Insulation Shield?

I'm installing a 45k BTU gas heater in my garage. It will be a vertical vent installation with 3" b vent pipe and I'm going to insulation the attic with about 18" of cellulose insulation. No one ...
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1answer
20 views

Wall grille that fits one step stair

Between my dining room and living room upstair area, there is one step down and there is a wall grille that is 5.5" tall. What drives me nut is there is no 14x5.5 grille anywhere. There is either ...
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53 views

Vent Blowing Cold Air in Basement

I just moved into a house with a vent that is just blowing cold air, constantly. It's making the basement really cold. It's near(~10' away) the boiler. Does it have anything to do with that? Am I ...
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2answers
49 views

How to install vent cap over cement pipe?

The picture attached is a cement vent pipe I found on the roof for water heater venting. Looks like the cap has been broken off, but I have no idea what was the original looks like. The diameter of ...
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2answers
31 views

Condensation though vent

We bought an underground house (bunker). After installing bathroom ceiling vent fan we have condensation dripping from fan. Due to using existing duct work that runs up through 9 inches of concrete ...
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1answer
79 views

Can I reduce dryer vent through basement wall?

Can I reduce my 4" solid dryer vent pipe to a 3" at the outlet, my foundation has only 3 1/2 " opening between floor and concrete to cut through. This picture shows where the vent to outside will go. ...
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2answers
34 views

Covering intake register for a whole house fan in winter

The register for the whole house fan blows cold air in winter from the attic. I would like to cover it up to avoid this. I have seen HomeDepot/Lowes sell magnetic covers. However reviews indicate ...
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2answers
78 views

How can I clean out a dryer vent which exits under my backyard deck?

Since I cannot reach the end of my dryer vent cover to push all the lint out with the long brush kit, what is the next best way to go about cleaning it? Would using a shop vac hose work and suck it ...
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16 views

vinyl siding detailing around a commercial kitchen exhaust vent

I recently had new vinyl siding installed overtop of my old T1-11 and have an issue I need some help with. I have a large round commercial kitchen exhaust vent sticking out of a wall and am trying to ...
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1answer
130 views

What is this microwave filter thing?

During the process of remodeling my kitchen, I removed the Over-the-range Microwave but when I put back in, I saw this piece I frankly cannot fit it anywhere, not in the bottom or on top at the vent ...
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2answers
1k views

Bathroom Vent Fan Upgrade

I am upgrading an undersized bathroom fan that is 50 CFM and has (possibly) a 3" to 4" exhaust pipe. The new fan, which is 150 CFM requires a 6" exhaust pipe. Do I need to rip out the existing vent ...
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1answer
20 views

Direct vent boiler exhaust exiting close to brick chimney

The exhaust vent for our Burnham Spirit direct vent boiler currently exits very near the junction box where I recently installed an IR-triggered motion-sensitive floodlight. The hot air is causing ...
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117 views

Wiring a bathroom light/vent/heater

In a late spousal design change, we would like to install a new light/heater/vent in a bathroom ceiling. We originally ran 12/2 Romex to the location when it was just going to be a light. Can we ...
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1answer
21 views

Extend sidewall hot water tank vent outside?

I have a power vented hot water tank just on the other side of the wall (and in the basement) from the exterior pipe you see in the picture. The problem is that the steam vents onto my wife's flower ...
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57 views

What are the options for soundproofing a concrete block air vent without blocking airflow?

This is a European building built with concrete blocks. Two of the four bedroom walls are external walls. One of the external walls has a cutout to the exterior just below the ceiling level for a ...
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0answers
24 views

Additional vent for Heating Boilers

I have a very old house and I am renovating my basement and i recently bought a new 140k BTU boiler for heating. I have a separate boiler for hot water. Both boilers are being vented through a Chimney ...
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0answers
43 views

Can I put in a vented bathroom fan in my condo

I just purchased a condo in Myrtle Beach, SC - it is the first time I have owned a condo versus a house. While exploring, I found that the bathroom fans don't vent outside, they just circulate the air ...
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1answer
175 views

Adding Soffit Vent for Bathroom Fan

I have a small bathroom with exterior walls in an area of my home with a vaulted ceiling (and thus no attic access.) When I moved in, the exhaust fan was uselessly "exhausting" directly into a ...
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2answers
67 views

Do I need to sanitize my air vents after I remove a bird from them?

I am quite positive I have a bird in my air vents. I plan to remove it tonight but I'm not sure what I should do afterwards. Should I have a company sanitize the vents/system? I just don't want any ...
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0answers
43 views

Air brick in old Toronto home?

We have a house that was built in 1937 in Toronto. It is a double brick design. On one of the outside walls, I can see what appears to be a single-brick-sized vent and I don't know what its function ...
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1answer
253 views

How to make a 8 inch hole through a brick wall for venting

I am planning on Installing a Vent hood the manufacturer recommends 8 inch duct work. I am looking for options to make this hole. 1) Diamond hole saw. I couldn't find a diamond hole saw in 8 inch. ...
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2answers
79 views

Are there any options for connecting into main stack for venting branch below waterline?

Are there any options for connecting into main stack for venting branch below waterline? Could I go up for a few feet with a with a wye join and then come back down? The reason for trying to come up ...
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2answers
55 views

Are air vents in a house intended to let some air through when they're closed? Would it be bad to completely seal it?

I would like to be able to use the vents in my house in a way that targets specific rooms/areas more than others. Sometimes I want to completely close off a room from being temperature-regulated by ...
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0answers
24 views

Hood vent duct in floor - sealing it

I have an 8" duct that comes up through the kitchen floor (runs in subfloor between basement and 1st floor and vents outside) and through a kitchen cabinet bottom that will house a pop up vent. I can'...
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1answer
31 views

Connecting a vent fan

I have a new vent fan, but no instructions. The old van had a light and fan, and I have two wall switches for it. The new fan has a light and fan as well. In my ceiling I have a black, white, red, ...
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1answer
70 views

constructing mechanical chase

I'm thinking about putting a mechanical chase in my home to connect the roof to the garage. The chase would contain the flue for water heater and furnace, and possibly a dryer vent (separate from ...
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1answer
315 views

What is this round roof vent fan called and how does it work?

The following round fan is installed in a residential roof in a house in Pennsylvania. The roof also has soffit and ridge vents. The round part of the fan spins, but it is unpowered (by electricity)....
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2answers
42 views

Incandescent Equivalent for Bathroom Fan/Light

We are looking at lights/fans for the bathroom. We don't want to spend a lot of money. The fan/light combination units at Menards and Depot say to use incandescent or energy-efficient equivalent. The ...
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147 views

How do I remove the cover from a square drop ceiling diffuser?

How do I remove the cover from a this square drop ceiling diffuser to adjust the diffuser?
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44 views

Cooker hood venting close to eaves

I have had a new single story extension built to first fixtures; this includes a new kitchen area. Building Control (UK), will not sign off the extension until an extractor hood is fitted with ...
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0answers
31 views

Toilet Vent when no horizontal run

I am remodeling my own 67 year old house basement and putting in a full bath. The 4" waste line runs a few inches below the concrete floor and passes by the proposed toilet. Previously I replaced the ...
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1answer
273 views

Dryer vent hose not staying connected to the dryer vent even with clamp

I cannot get the hose to stay on the metal vent coming out of the dryer. I have tightened the clamp til I am almost bending the pipe but the venting material slides right off? Help and thank you!
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1answer
35 views

Can I use foil duct for Kenmore 700 dryer?

I pulled my dryer, and am reinstalling it. It had a semi-rigid metal transition duct, which was all bent out of shape, and looked like it had some holes forming (see pic). I did homework, and read a ...
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1answer
111 views

Ideas for covering vents to stop pests getting in?

We have a crawl space under our house and the wire mesh covering the vents is shredded. I want to keep the animals out and would like some ideas on the best way to do it. I was planning to replace ...
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5answers
2k views

Dryer venting problem

I own a home built in 2003. The laundry room is in the middle of the house, but also adjacent to the garage, I live in Florida. The dryer venting system is close to the floor, turns, 90 degrees, ...
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71 views

Do I need a wall thimble for thermal separation with a category III venting appliance?

I bought a tankless water heater that allows me to vent using category III. I've seen that wall thimbles are included in many category III termination kits, but am wondering if they are really ...
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3answers
622 views

Connect 4“ Dryer Vent Duct to 4” Exhaust Pipe

I just had a new dryer installed. The installer said I needed to buy a pipe reducer because the dryer vent duct and the exhaust pipe are both 4". He cut some holes in the dryer vent duct to fan it ...
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2answers
884 views

Are insulation baffles necessary if the side attic has roof vents?

I am doing some remodel work in my finished attic. I've removed some drywall and have temporary access to the side attics. I'm concerned about the insulation and would like to fix any problems now ...
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2answers
42 views

What to look out for when installing a gable attic vent?

My attic needs better ventilation. On one end of the attic it terminates to a room that has a cathedral ceiling, and the other end of the attic terminates at an exterior wall (the main gable). It is ...
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1answer
130 views

Trying to understand the venting in my home

I'm trying to make assumptions on the purposes of the vents in my home and I understand that it may not be correct without opening up walls. It would be a great help for me in knowing how my home ...
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1answer
23 views

Can I run a 8 inch vent for a downdraft range fan in the same trench as my sewer line?

Can I run my 8 inch duct for my down draft range fan in the same trench as my sewer line?
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2answers
1k views

How many soffit vents do I need?

Quick question regarding venting of my attic. I have two gable vents and a ridge vent, but home inspection recommends soffit vents be installed. I've calculated how many soffit vents needed, without ...
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1answer
167 views

Connecting dryer to dryer vent

In all the youtube videos I see, dryers are connected to dryer vents via flexible hose. One end is clamped to the dryer and the other is attached to a plug that fits into the vent I bought a vent kit ...
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1answer
17 views

Intake blockage on hot water heater - shuts off

I have a similar problem to a question I’ve seen posted here before. I have a high efficiency water heater...and the sensor keeps shutting it off as the intake pipe outside gets full of frost. I’...
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89 views

Dryer vents and mice

We have been dealing with mice since the fall, eventually we got a pest control company and their recommendation after setting their baits for ~3weeks is to seal all the cracks and holes. One thing ...