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.

learn more… | top users | synonyms

0
votes
0answers
15 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 ...
2
votes
1answer
23 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 ...
1
vote
0answers
28 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
46 views

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

I have a challenge on floor two where a curved steel roof and spray foam makes the best option in a toilet/sink small bathroom fan to route down and laterally out the side of the side of the home. I ...
0
votes
0answers
19 views

Do I need a damper on both ends of the ducts on my kitchen range hood/extractor?

My new kitchen range hood is compatible with both 3-1/4" x 10" rectangular ducting and 7" pipe ducting. It includes a damper for the 3-1/4" x 10" format, and an adapter plate for 7" - no damper was ...
0
votes
1answer
29 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
72 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
61 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
110 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
118 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
162 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
27 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
103 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, ...
0
votes
0answers
71 views

Should I add an air return in my basement and seal old vents?

My question is basically a variation of two prior questions: "How do I close and seal an old external vent" and "Should I add an air return in a finished basement." My house has a bottom level that ...
0
votes
0answers
118 views

What are my options for my chimney? (Ventless fireplace, insulation)

When we moved into our house it had an original chimney (now about 40 years old) but the original owners had converted the once-wood-burning brick fireplace into a ventless gas insert. I immediately ...
2
votes
1answer
86 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
64 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
104 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
108 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
78 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
63 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
94 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
60 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?
0
votes
0answers
28 views

Is my vent cap big enough for my vent hood?

I have installed a 900 CFM island vent hood. It works properly, but it doesn't vent as quickly as I would expect. The ducting is only 18" and straight out (and up) through the roof, so that's not ...
4
votes
1answer
862 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
25 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
76 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
4answers
2k 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
208 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
169 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
98 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
204 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
51 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
100 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
637 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
239 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
140 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
3answers
237 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
254 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
2answers
2k 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
185 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
540 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?
1
vote
1answer
196 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
3k 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 ...
0
votes
2answers
235 views

How should I shim a foundation vent?

I bought some new foundation vents that attach with tension screws instead of mortar. I chiseled out my old vent and with the new vent in place, there is a large gap. How do you recommend I fill the ...
1
vote
3answers
2k 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 ...
1
vote
3answers
661 views

What is the best way to clean a dryer vent?

I posted this questions 6 months ago.. Why does it take my dryer 3 hours to dry a load of clothes? I checked the cycling thermostat and thermal fuse. They are operational. I have seen different ways ...
2
votes
2answers
208 views

How can I trace the exhaust duct of my bathroom fan?

I have a suspicion that my bathroom isn't venting correctly. I'm thinking smoke would be an easy way to test this, but I don't know of a safe and cheap way to make it. Any ideas?
1
vote
0answers
823 views

How can I tell if my bathroom ceiling vent is working properly?

Seems to take the vent forever to clear shower vapor from room. I purchased a vent that had a good rating. It is vented to the outside. How do I know if it is working properly and actually venting to ...
2
votes
1answer
246 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 ...