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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40 views

Screwing in to an HVAC vent

I'm trying to mount a sliding barn door in a room. It has five holes in the rail for the lag screws to screw in to. One of the five holes is directly over an HVAC vent that leads to the upper floor - ...
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41 views

Installing a vent grill when the floor is finished

Is it possible to install an HVAC vent grill in the finish floor? This is in the attic space under a sloped roof, where the floor doesn't run all the way to the roof, so we actually have access to the ...
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22 views

Chimney draft and air flow measure

How can I get a reasonably accurate picture of the functional fitness state of my chimney vent pipe? E.g. can I somehow measure the draft and air flow on two ends to make sure it flows smoothly, ...
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2answers
163 views

Why don't people install cold air return vents into wood stove surrounds?

I've been researching how to help my woodstove better heat my house, so that warm air from the stove (on one side of the house) moves throughout the house to other rooms, heating it more evenly (vs ...
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1answer
54 views

How does blocked vent switch work?

A blocked vent switch is a device mounted to a burner vent hood that includes a sensor detecting that the vent is blocked, then switched the gas supply off if tripped. My question is, how does this ...
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3answers
620 views

Baseboard diffuser is twice length of the vent

Recently purchased a home built in the 1960s. We have baseboard diffusers in 3 bedrooms that are getting carpet installed this week. The diffusers are old and big and I was looking to replace them. ...
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35 views

Kitchen sink clogged

Sink is clogged. Took out air admittance valve and it works fine. Added new one and it clogged again. Outside there's not clog. I don't know what else to do
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2answers
81 views

Boiler flue adapting to chimney vent pipe

I bought a used hydronic boiler at an antique shop to replace my old one. It came with a flue that reduces from 6" at the appliance box to 5" after a draft hood and a vent damper. My ...
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1answer
130 views

Why are there exterior vents to empty wall cavities beneath a large window on my late 1950's ranch?

I have two vents below a large picture window on my late 1950's single-story ranch with a basement (full-ceiling height) and cinderblock foundation: The holes do not go anywhere and I am having ...
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2answers
67 views

what kind of outdoor vent (for furnace) is this?

This is a vent for a home-heating furnace (blown-air, gas-heated). There was some kind of plastic meshing on the outside. It's broken. Now I have to go very high up and fix this somehow. A scary ...
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1answer
53 views

Can I cap this bow vent?

I am removing a kitchen from a basement which had an island sink. I will be leaving only the sink along the wall which has its own vent. Can I just cut both legs of the bow vent and cap it flush with ...
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2answers
42 views

Steam in bathroom

My bathroom originally vented into the attic instead of outside. I didn't have too much steam with this. A 3 inch vent was put on and exhausted out through the soffit. It wasn't effective. A new fan ...
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1answer
31 views

Best vent size for replacing drop-ceiling register with boot for drywall using 8" duct?

I'm replacing my drop-ceiling with drywall in a basement room. Right now there is one register on an 8" duct – the kind where the duct is just open and passes through a perforated 2'x2' grille ...
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4answers
68 views

Foundation vent grates

2 part question here. My house has these vents in the foundation: There are several of these around the house. They're about 18"x10". I want to block them off so mice and small animals can'...
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1answer
30 views

Dust buildup and vent airflow - Should my vents be completely open?

The room that I am in is particularly dusty compared to all the other rooms since I'm in it most of the time and it's very small with lots of stuff inside. I do my best to dust every surface but it ...
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1answer
91 views

Covered vent under carpet

I got carpet installed from Lowe's. The installers have covered the ac vents and return air vents in some areas. I have called them to fix it but I am not sure how can they do it and if they will find ...
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2answers
112 views

What could this tube sticking out of the roof be ? It was directly over the old ac system

We moved into this mobile home with a very old ac unit and we had a new one installed. The people who installed the new one said there was a hole and they weren’t sure what it lead to so they just ...
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1answer
62 views

Can a sewer vent pipe be rerouted?

We are adding a new shower and want to extend it by a few inches. But behind it is a sewer vent that has a bump out framed around it. It is on exterior wall and the roof is directly above it. Can it ...
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2answers
64 views

Is it beneficial to have a gable attic fan even though it's not attached to an external vent?

The gable vents/shutters are in an area of the attic that's not easily accessible for me. Ideally that's where the attic fan would go. Is there a benefit for me to still run a powered attic fan as ...
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1answer
60 views

My dryer isn't fully exhausting to the outside?

I recently bought a townhouse which has laundry in the finished basement. I noticed that our clothes took a bit more than an hour to dry in the dryer, so I wondered if there were any lint blockages. I ...
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1answer
82 views

Seeking suggestions for working around a crawl space vent when building a deck

Our home is a 1950s split level in IL. Our split level deck's step is shorter than code, everyone trips on it, and the homeowner is legally blind. We need to level the deck for safety. Raising the ...
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1answer
107 views

Is this dryer vent installed correctly?

Should I add those vent straps? It seems pretty sturdy, but I want to be certain. Is it even in a good location on the wall? Everyone I spoke with said it looks fine, but still a little strange to me ...
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0answers
30 views

1920's Home Attic Insulation Options for warmer summer months (SF Bay Area)

I'm currently trying to install a whole house fan in our 1000sf 1920s home in Oakland, CA. The weather is temperate and Oakland gets 3-4 weeks a year of heat that's 80deg-100deg. With our old house, ...
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3answers
2k 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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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
72 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 ...
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2answers
151 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 ...
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76 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 ...
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1answer
38 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 ...
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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. ...
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1answer
245 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 ...
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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 ...
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1answer
52 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 ...
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0answers
53 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 ...
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1answer
55 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 ...
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1answer
49 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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125 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
79 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 ...
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1answer
263 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 ...
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2answers
759 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 ...
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2answers
314 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?...
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1answer
82 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 ...
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1answer
323 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--...
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3answers
126 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 ...
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1answer
113 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'...
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3answers
117 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 ...
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3answers
133 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 ...
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0answers
59 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 ...
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2answers
164 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 ...

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