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
votes
1answer
159 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 ...
1
vote
1answer
141 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
2answers
53 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 ...
2
votes
1answer
149 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
2answers
58 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
45 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
1answer
51 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 ...
2
votes
3answers
123 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
2answers
62 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
45 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 ...
0
votes
1answer
182 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 ...
1
vote
1answer
37 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?
1
vote
1answer
66 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
3answers
1k 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 ...
3
votes
3answers
3k views

How can I insulate kitchen vent to prevent cold air blowing through all the time?

Building code requires my kitchen to have a 15cmx15cm vent (besides the kitchen cook-top vent). This vent is basically a hole in the wall that reaches to the outside. The vent has grating on both ...
0
votes
0answers
17 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 ...
9
votes
9answers
10k views

Do thermostat-controlled, auto-adjust HVAC vents exist?

The residential forced-air HVAC systems I have seen are controlled by a single thermostat in one room. One has to manually adjust the vents in order to adjust the temperature in other rooms. Is ...
4
votes
1answer
119 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 ...
6
votes
4answers
10k views

Why is one bedroom always colder than the rest of the house?

We have a two story home with 3 bedrooms upstairs. Home is 7 years old. One of the bedrooms is always around 5-6 degrees Fahrenheit colder than the rest of the house (when compared to the thermostat ...
1
vote
0answers
20 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 ...
9
votes
7answers
13k views

What is the best way to clean your clothes dryer exhaust?

My dryer exhaust goes out of my laundry room, into my attic, and runs for about 15 feet before it gets outside. Over time the lent has built up quite a bit. What is the best way to clean this? The ...
1
vote
4answers
536 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 ...
2
votes
2answers
8k views

What is the quietest range (cooker) hood?

I have looked into the Broan Allure series which claim to be quiet (1 sone). However on closer inspection, the claimed sound level is only for the lowest setting. The highest setting is 4 sones (4 ...
0
votes
1answer
155 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
3answers
6k views

Why does it take my dryer 3 hours to dry a load of clothes?

I have a Maytag model LD69806AAE clothes dryer. Since our tenants in our town home have moved in July 2012. They have pointed out that the dryer takes about 3 hours to dry a load of clothes. The dryer ...
4
votes
2answers
118 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 ...
6
votes
1answer
602 views

Venting the attic space during summer to cool the house

The air in my attic gets superheated during summer, from the sun baking the (clay? terracotta?) roof tiles (I live in Sydney, Australia). I have good ceiling insulation, and even put in some sarking ...
2
votes
1answer
475 views

Is it possible to install flush mount floor vents in a laminate wood floor?

My laminate flooring doesn't come with floor vents so I may have to find some and stain them. I was told I need to get the drop in floor vents that sit above the flooring, but is there an easy way to ...
0
votes
1answer
74 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 ...
3
votes
3answers
3k views

How do I close and seal an old external vent?

I was removing some ancient hanging cabinets in my small laundry room when I found an old vent of some kind. It had been completely hidden behind the old cabinetry. My dryer vents out through the roof ...
0
votes
1answer
118 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
37 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
63 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
1answer
240 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
89 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
87 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 ...
1
vote
3answers
2k views

Can I clean my under-the-floor dryer vent?

Our laundry nook is smack in the middle of our house. The dryer vent goes into an interior wall, turns 90° downward, soon turns 90° back the way it came, and goes straight for four or five meters ...
4
votes
2answers
871 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 ...
1
vote
1answer
254 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?
6
votes
5answers
6k views

Is it possible to use a dryer vent as a heat source in the winter?

Is it possible to attach a diverter to an electric clothes dryer vent so it can help heat my house in the winter? Seems like such a waste to blow it all outside. I imagine you'd need some sort of ...
1
vote
3answers
288 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 ...
1
vote
2answers
139 views

Cleaning a dryer vent with a sharp elbow

Curious if there is a good solution for cleaning a dryer vent that has two sharp elbows in it, one next to the other. There is a 90 degree bend as soon as the vent enters the wall and another 90 ...
3
votes
1answer
844 views

What are some alternatives to a square ceiling air diffuser?

We recently bought a house that had an addition put on in the 80's. The addition is on the back of the house and has separate (electric) heating and cooling. In the ceiling are two square, 12.75" air ...
2
votes
3answers
143 views

Can I use a vent that was over an electric oven for a dryer instead?

I just bought an apartment built in 1980 and it does not have a washer and dryer. There is a vent above an electric oven. I am remodeling the kitchen and moving the oven to the other side of the ...
0
votes
1answer
860 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
156 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 ...
2
votes
2answers
155 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
553 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
183 views

Covering roof vents to keep out roof rats

I have around 20 vents on my roof and I currently do not have a roof rat problem but I want to cover them with something to prevent roof rats getting into the attic. I'm sure I can find something at ...
0
votes
1answer
450 views

Can I cover a high efficiency HVAC vent?

Just moved into a house with a High efficiency HVAC (heating and air conditioning) which vents to the outside ( with a booster fan). the outside pvc pipe is just " open" . no cap, no screen.. i know ...