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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1answer
145 views

Does this vent cap limit passive air flow?

I am looking at various vent covers for my house. I have a 3" Plumbing vent stack and a 4" Radon vent stack. The radon system is passive, which means I do rely on a chimney effect along with the ...
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3answers
31 views

Removing cap from box/turtle style roof vent

I have a vent on a shed roof: that has a huge wasp nest inside (though no wasps (at the moment), thankfully!). I can see it from the inside of the shed (not pictured). I thought it would be easy to ...
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2answers
2k 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
584 views

What type of chimney liner and vent pipe are required for a wood stove?

I am working to rehabilitate an old chimney for use by a wood stove. There will be approximately 18 ft from the wall chimney socket (this is probably not the correct name for it) to the chimney top ...
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2answers
37 views

Ceiling vent right next to wall. Ideas for grille cover?

The typical size 10x4 won't work because the wall is right next to it on one side (see picture). I can buy a smaller size but then the question is where do I screw in the second hole. Any ideas?
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1answer
47 views

HVAC leaking from saturation

So I've been having a leak in my AC handler. A lot of water was dripping into the drain pan which eventually hit my float switch. I recently moved into the house and the AC unit is 10 years old (...
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1answer
53 views

venting bathroom fan through soffit

So here's my experience of venting through the soffit. The humid air from the bathroom is expelled downward and rises up again to the soffit and in very cold weather in Canada it freezes there, then ...
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1answer
100 views

Hot Garage - Do Garage Door Vents Work?

My Garage gets hot in the summer! Outside temp might be 85 degrees Fahrenheit but in the garage it's over 110. If I leave the door open about 8 inches temperature equals out. Issues with leaving ...
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5answers
24k views

HVAC supply vent noise: how to eliminate the whistling wind tunnel?

Every time the heat turns on (rented house), we are getting choked with too much dry hot air in our small room. When I try to close the supply vent it produces a really loud whistling noise. I either ...
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1answer
759 views

How can I duct through a new cabinet from a floor vent opening at the wall?

Got a window bench put in, but need a way to direct the air from the old baseboard vent register hole to out the front of the bench. NOt so sure a box store is going to have the proper vent duct parts ...
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5answers
11k views

Bathroom vent through existing roof vent

I have a roof with two gable vents as well as slanted vents that look a lot like these one: I do not want to install an extra vent specifically for bathroom so I was wondering if I could use one of ...
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2answers
15k views

Can a plumbing vent pipe be vented horizontally?

I live in NYC and I have a plumbing vent pipe which vents through the roof. The vent pipe however has some "angled" pipes which bring it out into a small section of a bedroom to avoid going through ...
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1answer
104 views

Is my plumbing drain/vent setup ok?

I'm new at plumbing, working on installing a master bath in our house. Pictured is the room with the shower pan in place, a vanity drawn where that will go and you can see the toilet flange sitting in ...
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4answers
12k views

How should I route my dryer exhaust pipe?

My existing dryer vent run enters the crawlspace behind the dryer and exits through a vent that is part of one of the normal crawlspace vents. Since the house sits on a slight slope, the crawlspace on ...
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1answer
33 views

Dryer exhaust pipe

M1502.4.1 Material and size. Exhaust ducts shall have a smooth interior finish and be constructed of metal having a minimum thickness of 0.0157 inches (0.3950 mm) (No. 28gage). (a) can I use metal ...
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1answer
34 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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3answers
6k views

Bathroom vent terminates to attic not outside.

Bathroom vents terminates to attic. The Inspector recommended that it terminates to the outside. What is the best way to do this. Should I just place the bathroom vent next to the roof vent opening.
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1answer
31 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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3answers
988 views

Can I replace a microwave with a range hood exhaust vent without doing carpentry?

My fairly small kitchen has a standard (30") four-burner slide-in gas range, and above it a microwave with a built-in vent. All over 10 years old. The vent exhausts to the exterior via a duct that ...
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2answers
76 views

Can I vent a portable air conditioner unit through a heat vent?

I have an old house and don't have a window to open for the portable AC to vent to. Can I vent it out through a heat vent (my home has modern ventilation)?
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1answer
38 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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0answers
39 views

toilet won't drain - appears to be no blockage

First floot toilet - extremely slow drain, more than 2 hours. Bath - extremely slow drain, ditto. Sink - gurgles a bit (also while bath trying to drain) but will drain with cold tap going full blast. ...
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3answers
5k views

Is 150 CFM ventilation fan right choice for bathroom in my older condo?

My bathroom ventilation fan broke up and I am shopping for a new better one. I noticed the newer fans are higher CFM through-put and are quieter, I have narrowed down my choice to this one. My ...
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0answers
27 views

Is there a simple way to evaluate whether a vent stack is clogged?

I recently spoke with a home owner who has had a number of plumbing issues, ultimately resulting in a new sewer line run from the residence to the main. The homeowner is concerned that there may still ...
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1answer
46 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
130 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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1answer
48 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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2answers
114 views

How to remove an external dryer vent cover when it's covered by stucco?

I don't know who built this house but they did it stupidly. I need to replace my external dryer vent cover because one of the fins broke. However, it seems like whoever built the house, covered the ...
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1answer
151 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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2answers
98 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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3answers
312 views

Range hood vents into attic space

My house was built in 1976. I recently replaced the range hood and discovered that the piece of rectangular ducting that runs inside the cabinet is not connected to the outlet vent on the outside of ...
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1answer
62 views

A more thermally efficient house - can I block up vents in my brickwork?

I live in the UK in a typical '1930's semi' house. It is built with two layers of good old bricks and a cavity wall inbetween them. In my hallway, there is currently no carpet or hardwood flooring - ...
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2answers
2k views

No Attic vent, in Florida, new-ish house - needed?

We have a SW Florida (Cape Coral) house built in 2005. The house is block construction, high ceilings (10-14'), about 3100 sq ft, and concrete tile steep hip roof (by eye at least 12 in 12). The ...
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2answers
1k views

How can install rafter baffle venting without removing drywall?

I have a finished attic, that needs to be updated. The pitched sides of the roof are sheetrocked & insulated, the ceiling is a suspended ceiling (will be sheetrocked) and the low knee walls are ...
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1answer
178 views

What should I look for in a roof dryer vent?

I'm in the process of installing an upstairs laundry room, and I'm looking to vent the dryer to the roof. The route to an outside wall is almost 25 feet, with a few turns, whereas the route to the ...
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1answer
47 views

Drywall before or after vent installed?

I have a large (14x20) wood louver with a frame that is going over a return vent. Should this be installed first and then have drywall put around it, or should I install the drywall first, then cut ...
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2answers
10k views

Can I move the range hood but not the roof vent (angled “flue” pipe)?

I have a typical 30" stove installed in the center of a 20' wall with a standard overhead hood that looks a lot like this. I want to redesign my kitchen with new cabinets so the stove becomes corner ...
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2answers
119 views

Dryer vent through cinder block and then through yard - is this ok?

I've been researching how to vent my basement dryer, using galvanized steel ducts. There are lots of things on Google that show how to do this under a normal situation, but mine is unique, and I can't ...
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1answer
541 views

Ridge Vents vs Gable Vents Energy Savings as a Percentage or $ Figure

I am having a new roof installed and there is an additional item Ridge Vents that I can add to the home - I currently have Gable Vents - no sofits. I understand that the gables need to be blocked and ...
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2answers
3k views

Is there any reason to not tape this vent over?

I just want to make sure this wont hurt anything. Right before I bought this house, it got a new AC and furnace but they did not replace much of the duct work. This vent is right above the AC unit ...
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2answers
42 views

Question on drywall patch in the ceiling

I have a ceiling vent where the drywall is cut a bit larger than the actual vent. I was looking for some advice on the repair. The duct is mounted to a stud along the top (a piece of the stud is ...
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1answer
65 views

Can you shorten class B water heater vent pipe?

New gas hot water heater is 5" taller than old (of course the same size would be too easy).Flex water and gas lines -no problem; but the class B ( double wall ) exhaust vent is ? Can it be cut? How? I ...
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3answers
65 views

Does using an existing attic exhaust pipe to also serve air flow from a range hood cause smells/micro particles of oil/soot/etc to get into attic?

Our kitchen renovation contractor decided to change plans on us and vent the range hood out via the same pipe as was pre-existing to passively control the temperature in our attic, instead of vent out ...
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2answers
8k views

Drywall surrounding vent no longer supports screws;

Screws that normally fix the vent in place can't do their job anymore. The drywall has crumbled to the point that the tapped hole for the screw lacks a boundary with the duct. (Picture attached.) ...
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2answers
71 views

Basement Bathroom Venting Help

Our basement has been roughed in for a bathroom. My layout has a three floor PVC pipes coming out of the ground. The left most pipe has a tipped over bucket cemented onto the floor. There is a middle ...
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2answers
109 views

Sewer gas smell in replumbed old house

We bought a 1920 house about a year and a half ago and occasionally we can smell a sewer gas odor and I’ve been trying to figure out what the cause is. Whenever we smell it, it’s coming from either ...
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1answer
814 views

Bathroom exhaust vent into crawlspace

It is acceptable to vent a bathroom exhaust fan into a crawlspace? The crawlspace in question is uninsulated, has a dirt floor, and varies in height between 5' and 7'. The vent would enter roughly in ...
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1answer
35 views

Stalling roof turbines to improve air flow?

My landlord claims that roof turbine ventilators move more air when they do not spin—e.g. by stalling it using a piece of wire tied through the vent and the brace. His reasoning, roughly, is that when ...
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0answers
33 views

Bathroom Vent Fan Leaks

I have red water leaking/dripping from the vent bathroom fan in the second floor bathrooms. This only happens after a good snowfall and during the snow melt as it warms. We get about 6 hours of ...
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2answers
133 views

Is there a dimmer light switch with secondary constant 120V output?

I have a vent fan and an overhead light in my bathroom. They are currently tied to one standard light switch. When that light switch is in the "on" position, the vent fan and light are both powered on....