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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2
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0answers
45 views

Replaced a Heat/Light/Vent with a vent only. There does not seem to be a hot wire:

The three gang box previously had a HLV combined switch plus a switch that operated a separate light. Stupidly, I removed and discarded the switches and units (light and HLV) without studying the ...
1
vote
0answers
74 views

Can a cheater vent be installed in a vanity drain that maybe running into a roof vented drain?

Can a "cheater vent" be installed in a vanity drain that MAY be running into a roof vented drain? All p-trap , tail piece is new and drain line has been cleaned with a drum auger netting no major ...
2
votes
1answer
389 views

How should I install a bathroom Exhaust Fan on 2nd Floor?

I would like to install a bathroom exhaust fan in my 2nd floor bathroom, due to moisture issues. There is no existing fan, only a light fixture. There are two exterior walls in this room and the attic ...
0
votes
0answers
64 views

How can I reduce the noise caused by a booster fan?

The previous owner of my house installed a booster/fan about 2 feet away from one of the bedroom registers. This causes excess noise in that bedroom. The fan is about 40 feet away from the main ...
0
votes
0answers
207 views

Why Is My Dryer Vent Electrically Charged

I recently purchased a home built in the 1980s. When I went to hook up my 3-pronged dryer cord (with L), I noticed the outlet is the old 3-prong (all straight) typically used for ranges. I switched ...
1
vote
2answers
246 views

Should our kitchen sink vent through the roof?

Our kitchen sink vent pipe goes up through the ceiling but not through the roof, should it go through the roof?
3
votes
2answers
1k views

Timer needed on bathroom vent fan?

Does the International Building Code (IBC), or International Residential Code (IRC) require a timer on bathroom vent fans? (I realize all code is local, but just trying to get the standard rule.)
1
vote
4answers
6k views

Do I need a vent fan in an interior laundry room?

I am renovating a few rooms including an existing laundry room. It currently has one exterior window and another openable window onto an existing mudroom (which also has exterior windows). After the ...
1
vote
2answers
771 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 ...
0
votes
0answers
101 views

How should I wire this 3 switch box in my bathroom?

I have a 3 switch box and the bottom switch that controls the heater was broken so I replaced it and I can't remember how to wire it, tried 10-15 combinations and it still doesn't work, not sure how. ...
1
vote
0answers
275 views

gas fireplace smells

I bought a house that was vacant for a year and a half. It has a gas fireplace. The plumber that fixed the heating unit supposedly looked at the fireplace too and lit the pilot for me. I lit the ...
3
votes
1answer
85 views

How can I repair a bathroom fan under garage that is leaking in the winter?

I have a rigid metal exhaust pipe coming out of the bathroom fan over my downstairs bathroom. It goes up at approximately a 30 degree angle for about twenty feet and stops just before it gets to the ...
2
votes
1answer
137 views

What type of furnace vent pipe is this?

I need to extend my furnace vent pipe up 2 foot above the ridge of my roof to comply with IBC. So I need to couple this pipe somehow and extend it up. Any idea what type of pipe this is and how I ...
2
votes
1answer
109 views

Is it code compliant for a new construction bathroom vent (no shower) to go down and then over?

I have a challenge on my second floor where a curved steel roof insulated with spray foam makes the best option for a half (toilet/sink) bathroom fan's vent to route down and laterally out the side of ...
0
votes
1answer
226 views

Vent pipe related odor

Odor happens when adjacent bathroom toilet is flushed and is only smelled in adjacent laundry room??? Was really bad at Thanksgiving when we had about 14 extra people in our house for several days. ...
1
vote
0answers
215 views

how to insulate attic bathroom vent to prevent condensation

i bought a house in june and the bathroom fan start dripping water a few weeks ago (november). I looked at the inspection report and the picture shows that the vent duct through the roof isn't ...
2
votes
1answer
200 views

Why do small vents at top of garbage disposal blow out water when sink drains?

I just finished replacing the mounting gasket of my In-Sink-Erator Badger 5 as I thought that was the cause of occasional water on the floor of the kitchen cabinet. Admittedly I never diagnosed the ...
6
votes
1answer
143 views

Does anyone have experience with small heat-recovery air exchangers?

I know there are units made which are supposed to be sized for use in a residential kitchen, as a more efficient replacement for the usual vent hood (bring air in to replace air blown out, but ...
0
votes
1answer
346 views

Fast trick to figure out to where bathroom fan vents out

Recently had a guy come out to clean the clothes dryer and clothes dryer vent. Asked him to clean out the bathroom fan vent as well. He looked up the attic, on the roof, and along the siding, and ...
2
votes
2answers
432 views

Can a lower cabinet be used over a floor vent?

I didn't see this question asked after my search but I have a wall in the kitchen that has nothing against it and we are wanting to add some cabinets but towards the right of this wall, about 5' from ...
1
vote
0answers
37 views

Can I extend attic vents so they don't get blocked by snow?

I have 2 square low profile attic vents on the detached garage but I'm pretty sure they are blocked with snow during the winter. If I should alter them, are there extensions available to raise these ...
2
votes
2answers
538 views

Where should the main stack vent go?

Where does my primary stack vent go? Does it have to be at the end of the run? I have a pretty simple plumbing system. From the highest point to where the drain enters the house (lowest) I have Tub, ...
2
votes
1answer
146 views

Is there a reason for an exterior vent not connected to anything?

I have an exterior vent on the side of my house not connected to any piping within. You can look inside and see wood/concrete/insulation into the cavity between the basement ceiling and main floor. ...
0
votes
2answers
77 views

What kind of a bathroom vent is this? How do I open it?

http://imgur.com/bIHdOvX See picture. Bathroom vent doesn't appear to be sucking, so I want to open it and see if it's something to do with the fan. If the fan looks fine I think I'll have to hire a ...
1
vote
2answers
340 views

Is a 6 in. hole in a band joist okay?

I'm installing a Zephyr AK6500 range hood. The kitchen is on the first floor a 2 story home, which was built in 1967. I've run 6 in. round ductwork in a joist bay in the kitchen ceiling to the ...
1
vote
1answer
229 views

My upstairs bathroom fans don't vent properly, how should I handle this?

I just noticed this weekend that neither of my upstairs bathrooms exhaust fans vent properly. I hear the sound of the fan, but as google has told me, when I put toilet paper on the fan it doesn't ...
0
votes
2answers
104 views

Extremely long dryer vent line, non efficient dryer

my house is older, and my Dryer vent line runs the length of my house, which is approximately 30 feet. I am constantly sucking water out of my vent line. My new dryer still takes forever to dry ...
0
votes
1answer
95 views

Should there be an air outlet in an attic with a whole house fan?

There has been a whole house fan between the second floor and attic of my house for some time. We usually have it on with the downstairs windows open. I just had a thought: Should there be an open ...
1
vote
1answer
171 views

Are molds dangerous to health if they are not in my own apartment?

I need a help to decide if I will move out from this building because of mold and health risks. Is it dangerous to live in a buliding in which the hallway is full of mold? I've been reading about ...
1
vote
1answer
136 views

Can I use duct tape instead of a draft hood?

I have a small opening between my vent and water heater. Instead of buying a draft hood, is there any harm in using duct tape?
4
votes
1answer
3k views

How do I install a 1st floor bathroom fan?

My bathroom is on the first floor with a finished bedroom directly above and an unfinished basement directly below. It would appear to be easier to install a wall or floor fan and direct exhaust down ...
1
vote
0answers
36 views

How can I reduce the noise from an HE boiler vent?

I have a HE boiler that is direct vented out the side of my house on the neighbors side, they find the 'roar' of the exhaust to be very annoying. Have anyone tried troubleshooting these to ...
1
vote
1answer
117 views

Bathroom fan intake location

I have a log home with no bathroom fans. In a low humidity climate this is not a mildew problem, but it would be a nice to vent the other unwanted gas. The easiest place to install one is in the tub ...
1
vote
5answers
5k views

How to fit 4" rigid aluminum duct vent in between walls when there is an angle brace?

I want to do what these people have done here: The problem is I have bracing going diagonally and it is not leaving enough space for the 4" aluminum duct vent. Can I saw the bracing off for the ...
0
votes
1answer
342 views

Home made powered foundation vents? Computer fans and solar power?

So I have a bit of a moisture issue in my crawl space. I've considered closing up the crawl space completely but I think that sounds like to much work and this idea below sounds more fun. I was going ...
4
votes
2answers
297 views

Dryer exhaust from 2nd floor through crawl space, out roof

This is my setup, 1986 built town home. I just purchased a dryer and before connecting it, I decided to inspect the 4" tube going from the dryer, up behind the wall to the crawl space / attic and out ...
0
votes
1answer
148 views

What to do with old air/light shaft? [closed]

I live in an old house that is very narrow but tall. In the middle it features an old air/light shaft that looks very similar to this one. It goes through attic room, second floor bathroom, first ...
0
votes
1answer
527 views

How do I extend a length of aluminum flex vent hose?

I'm replacing a bathroom ceiling fan, and need to add a short extension (approximately 18") to the length of the existing vent hose. The existing hose is 4" aluminum flex. I have a couple questions. ...
0
votes
1answer
82 views

Boosting a dryer vent with an inline booster attached to the main line with a wye

Our dryer has an airflow sensor and is always warning us that the lint filter needs to be cleaned, even when it has just been cleaned. This started after we moved it to a new house that has the vent ...
0
votes
1answer
155 views

air vent on downstairs bathroom but not upstairs

Is it true that downstairs bathroom "need ventilation" more than upstairs, to avoid mold growth? I know at my house the downstairs bathroom has a vent fan but the upstairs does not. I'm wondering if ...
0
votes
2answers
2k views

Can I add an exhaust fan to bathroom without exterior wall or roof access

My master bathroom is wired for a fan, but I opened it up and found that it is just venting into the joist between the ceiling and the second floor. There are no exterior walls to access in the ...
0
votes
1answer
830 views

Is it okay to have a dryer vent in the wall cavity?

I'm redoing the wall of a utility room that, among other things, has the dryer vent embedded in the wall cavity with all kinds of stupid turns to go around the plumbing. Would it be a good idea to ...
1
vote
1answer
248 views

Bathroom, dryer and central vac - Can any of the exhausts be combined, and can any use the same penetration?

I have these three units within 5 feet of eachother. The place where the bathroom vents to is the only place within reach to have a penetration to outside. My options are to stack these three ...
3
votes
4answers
593 views

How do I get an exterior vent to stop frosting over in a cold Canadian winter?

We have a high-efficiency gas-fired hot water heater (in our a basement) that is vented to the outside of our house. When the weather gets below -30°C the vent has a tendency to frost-over. When ...
0
votes
1answer
413 views

Air admittance valves on waste pipe with extraction

Just move into a new apartment which is on the upper floor of three. The bathrooms of each apartment are directly above one another. I believe that the exhaust vents of the bathrooms in the apartments ...
5
votes
3answers
4k views

How do I prevent harmonic resonance hum in PVC vent of newly installed hot water heater?

I just had a new power vented water heater installed (HTProducts Phoenix Light Duty) in our crawlspace. The contractor that put it in used part of the existing 3" concentric vent from the furnace we ...
2
votes
1answer
278 views

How do I prevent my gable vents from clogging with ice?

This is the first time I have seen this happen in my 6+ years of owning my home. It is an older home (45+ years), but has gable vents on both ends (facing east and west). It has always vented well in ...
1
vote
1answer
1k views

How far away from the wall should ceiling heat registers be?

I'm installing ceiling heating registers. Are they required to be a certain distance from the wall?
2
votes
1answer
348 views

How can I vent my roof 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 ...
0
votes
1answer
6k views

Should I block or insulate my air vents for the winter?

I live in a house which consists of a 17 year old extension on a 40 something year old cottage. The two main bedrooms are the only rooms in the house with air vents. They are also two of the coldest ...