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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6
votes
3answers
1k views

Dryer vent coming up out of the ground

We recently moved into a house and hooked up a new (LG) washer and dryer. The dryer was showing us an error message related to decreased performance due to poor venting exhaust. I went outside to see ...
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0answers
29 views

Is 4in pipe OK for range hood with 7in vent?

We bought a 350 CFM range hood with a 7in vent. Our installer ran a 4in diameter flexible aluminum foil air duct horizontally through the floor joists to outside. We are now told the 4in pipe is too ...
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2answers
55 views

Can I install an AAV on a main house vent in my attic?

I have a small camp house in upstate NY on a septic system. The main plumbing vent presently opens into our vented attic space. The attic has ridge and soffit vents, plus two approx 2sq ft vents one ...
2
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2answers
61 views

Best way to repair the crawl space vent

So I had a few questions as far as stucco vents go. Here is an image of what we are talking about: What would be the best way to repair this hole? Just some wire mesh over it? Some follow on ...
1
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0answers
48 views

How should I seal a flexible flue liner passing through large clay thimble?

I'm replacing my atmospheric venting natural gas water heater and I'd like to clean up the type B venting solution while I'm at it. I've had a high efficiency furnace put in so now only my gas water ...
1
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1answer
33 views

Return air balancing

I have a 3 level townhouse, there is a damper controlling flow to each floor. My main concern is the number of vents on my upper level. One master bedroom (with bath), 2 smaller bedrooms, and another ...
0
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0answers
35 views

How can I install my dryer exhaust - Should I contact the builder?

I am trying to install my new LG dryer exhaust in a new build home and the part attached to the wall just fell off. Should I contact the builder? I have done this before and it was not as complicated. ...
0
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1answer
69 views

How can I prevent bugs from entering my apartment through air vents?

A massive cicada just crawled through one of the air vents in my apartment. I vacuumed it up and then taped Glad ClingWrap over the vent as shown below. The tape is painter's tape. I covered the ...
11
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7answers
2k views

How do I stop water from getting into floor vent?

We have a heating vent located on the floor close to a shower. Occasionally when the floor gets wet it can act like a drain and it causes issues on the ceiling of the floor below. I could use caulk to ...
1
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1answer
43 views

can you combine a regular return filter if you have a electrostatic hvac filter system

can you combine a regular return filter if you have a electrostatic hvac filter system as the house? we moved into a house that has this system but my kids have allergies and i understand that the ...
1
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0answers
47 views

Desert Sand Blowing Into My Attic

We live in the high desert of Southern California and our home is positioned facing South and the prevailing winds blow from the West. Our gable vent faces West and over time the sand has blown into ...
0
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1answer
42 views

Just installed Sure Vent is not working and sink is clogged. What did I do wrong?

Just installed a Sure Vent underneath our kitchen island sink. I added the T and 5-6 inch of pipe between the T and the sure vent. Now water is filling up the sink and the sure vent pipe. What did I ...
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0answers
16 views

In a tight spot with Venting a bar sink in basement

We're adding a bar sink into the basement of our house while we are finishing it. The location is at a place where we can attach to the drain just fine. The issue I am running into is that I am not ...
0
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1answer
46 views

What is this vent called?

Hi I need to get this vent/pipe replaced but I don’t know what it is called. Can anyone identify it for me. It’s in my basement near the furnace.
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0answers
43 views

Is 20' of 2" PVC with 2 45 degree elbows too restrictive for a 92% furnace?

I have a Goodman furnace, 92% efficient, GKS91155DXAF. The exhaust vent flue was previously 2 inch PVC with one 45 degree elbow about 6 feet long overall, and it was routed directly into a piece of 6&...
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0answers
41 views

Can I vent my bathroom with Air Return Grilles?

My apartment’s small full bathroom is about 50 sq ft, and there was an old Non-Vented Air Recirculating Fan in the ceiling. It died but there was still moisture/mold/mildew issues when it worked. I ...
3
votes
1answer
97 views

Enclosing utility room (furnace / water heater) basement

I have a very old furnace (HVAC) in a utility room (basement) with slatted door that’s very loud and was wondering if I could enclose the utility room (with mineral wool and solid doors) by adding ...
2
votes
2answers
285 views

Can I use horizontal 90 degree elbows to run a p trap along a wall?

Off center vent stack (see picture). Can I use a 90 degree elbow out of the vent stack, run drain pipe along the wall, and then another 90 degree elbow so that the p track will point directly ...
2
votes
2answers
135 views

How do I route plumbing vent line around a corner?

I am installing a floating vanity and need to move a 1 1/2 vent line behind the wall. I am in a row townhouse. How do I run the 1 1/2 pipe around the corner? Do I cut a hole in the studs or notch them?...
4
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1answer
79 views

Is my furnace vent installed correctly

96% furnace. The air intake was not directed and terminated outside as the old furnace was. The installer said that over the years it has been determined that the inside basement air is better for ...
1
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1answer
112 views

Can an AAV be in a crawl space if the P trap is also in the crawl space?

I have a situation where the P trap to the washing machine is in the crawl space instead of in the wall. There is no vent. I thought about adding an Air Admittance Vent in the wall (see diagram--...
0
votes
3answers
74 views

Periscope dryer vent exper

My dryer's vent tube is stuffed behind the dryer and preventing it from sitting closer to flush against the wall. I found this "Periscope" dryer vent kit and was wondering if anyone had ...
1
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1answer
63 views

Are there issues with venting a bathroom fan through the roof soffit?

When I purchased my house, during the home inspection it was indicated that the bathroom vent is simply discharging directly into the attic space. Because we were concerned about mold in the attic, we'...
1
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3answers
53 views

Size of insulated flex hose needed to install for bathroom exhaust?

What size of insulated flex hose do I need to install for bathroom exhaust. Fan is 110cm. Length of hose in attic is approx 15-20 ft, going just about straight to the exit site. Bathroom size is ...
0
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3answers
83 views

What type of duct should I use for a clothes dryer exhaust?

I am planning to relocate my gas dryer to the center of my basement. The closest vent is in one of the walls 16ft/5m away. To reach it I would need to run an exhaust pipe horizontally, enclosed in the ...
0
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0answers
58 views

Furnace vent pipe on roof full of frost, fan won't push hot air

After living in the same house for 7 years and having much more snow, my vent on the roof was full of frost. The thermostat would kick on,but no heat. This is the second time in 2 mths I had the vent ...
2
votes
2answers
122 views

How can I prevent frost buildup on a concentric water heater intake?

I have a hot water tank with a concentric PVC vent that's both an intake and exhaust for the tank. Whenever it's -30 celcius and below (I'm from Canada), the air intake on the concentric vent clogs up ...
2
votes
1answer
46 views

New roof, ridge vent and whole house fan ?? Help!

I am in the process (day1 of 2) of getting a new roof. I have a whole house fan - Louvered ceiling type. House was built in 1968 so I have no spec on that fan. It has (or had after they ripped it ...
1
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3answers
46 views

Replacing Bathroom Vent Fan

Looking to replace a bathroom vent fan in a property that is being renovated. The exhaust fan was not working, upon further inspection it seems to be the motor that is causing the issue. I want to ...
0
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2answers
140 views

How to patch hole in furnace pipes?

I recently bought a house and the heating bill has been unusually high. I discovered there is a big hole leading to the outside that the previous owner hid, but isn't sealed properly. Their patch was ...
2
votes
3answers
135 views

Why did HVAC company add a heat outlet register venting into my attic?

I recently had a brand new HVAC system installed in my attic. The furnace is natural gas. The furnace kept shutting down after 7 to 12 minutes, due to "too much air" blowing on heat sensor ...
1
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3answers
75 views

Pest proofing turbine vent

I installed this turbine vent but noticed that small animals like rats, small birds or even small squirrels can get through the rotor gills when it is not spinning. I was thinking of putting a metal ...
1
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1answer
69 views

How can I slow the cold air coming in a furnace makeup vent?

I've got an air vent from the outside which discharges right next to the furnace. I know the furnace needs this air, but a glacial breeze comes through all the time. I've found 3 options and I'm not ...
0
votes
1answer
109 views

How can I run 2" plumbing vents under windows in a 2x4 wall?

I have new construction with 4" drain and 2x4 exterior walls. I am building a detached shop/living quarters with 2x4 walls and all plumbing is in one exterior wall. how would you run it? :) are ...
2
votes
0answers
16 views

Safe to install humidifier above furnace gas vent?

I'd like to add an AprilAire 600 bypass humidifier. I plan to install the humidifier on the supply plenum, and the bypass duct on the return air. The gas vent coming off the furnace is type B. ...
1
vote
4answers
567 views

How can I get my floor register to fit in the duct opening?

My duct opening is right next to the wall. I pulled out this old register to replace the baseboards but now I can’t fit it in the opening anymore. It seems like the existing duct gets in the way when ...
0
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0answers
32 views

Mold on Bathroom Ceiling

I have a popcorn ceiling in my bathroom that has a tendency to collect mold. I clean it off with bleach but it always comes back. There was no mold prior to remodeling the bathroom a few years ago, ...
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0answers
45 views

Options for re-plumbing a new vanity install with a vent in the way

I would like to install a new vanity. It is designed to go flat against the wall, and has some open space at the lower end part: Current plumbing was made all "unique" and gets in the way: ...
0
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0answers
49 views

Dryer vent vertical rise

My vent rises vertically about 5 ft from the dryer. I am trying to decide if it will considerably save drying time if I move it to only about a foot above from the dryer exhaust is, as the space both ...
0
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0answers
33 views

Adding a diverter to an electric dryer into a basement not the home

I would like to put a diverter on our dryer vent on our electric dryer in the basement and not in the home. Has anyone ever done this to take advantage of the air that comes out of the dryer. I see ...
1
vote
1answer
53 views

Are plastic dryer vent fittings (not hose) allowed with gas dryers?

I'm trying to use a ovalized to 90 degree connector for my metal flexible hose connector in my dryer and the only one I can find is plastic at the big box store that is made for specifically for dryer ...
1
vote
1answer
139 views

How can I close a gap between ceiling drywall and a furnace flue?

My gas furnace is located in my laundry/utility and is normal(~80%?) efficiency with a Type B Flue. It goes up through the drywall ceiling into my attic(1 story) and out the roof and I verified that ...
3
votes
1answer
39 views

Heater blowing cool air

I did an experiment with the central heater when I noticed it was blowing slightly cool air. I first let the temperature drop to 67 degrees. Then, I set the thermostat to 68, which triggered the ...
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votes
2answers
81 views

Gas Vent Pipe - Outside Placement

I Recently adjusted the exterior furnace gas vent pipe as per the picture below. The old placement ended where the first elbow (up/left looking at the pic) is currently. However given that my 2 year ...
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0answers
13 views

Blocking foundation vent bricks

We recently bought a house in the UK built on 1936. The house has been refurbished and extended a few times over the years. With the cold and moist weather outside, the first thing we noticed was a ...
1
vote
2answers
50 views

Removing excess HVAC ductwork for efficiency

I have central ac in my home and at some point the kitchen was redone, blocking an existing vent permanently. The flex HVAC ductwork leading to the vent (probably 8 feet of it) is still there. Should ...
0
votes
0answers
61 views

Replace vent cover or add mesh screening

Recently we've had some mouse activity so we're on a mission to find and seal up any possible entrances. Looking at this kitchen vent which is suspiciously located near where the activity is happening ...
0
votes
1answer
151 views

Is lateral offset in 3.25x10 inch duct allowed?

I'm installing a microwave/range hood. To preserve usable depth in the cabinet above, I'd like to use 3.25 x 10 duct through the cabinet, and transition to round duct in the attic. However, a ...
0
votes
2answers
161 views

Laundry drain smells like sewer after washing clothes

I have an in-wall laundry drain - pictured below. Since we moved in it had a significant clog which I unclogged with a combination of wet-vac sucking on the drain and snaking the vent pipe. Finally we ...
0
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0answers
245 views

What type of insulation do i need to replace in my AC air vent registers?

We noticed we had mold on our register grills due to one of our AC unit not draining anymore in the attic (water was ponding in the pan); we had a remediation company come out and they told us we ...

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