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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5
votes
1answer
324 views

Will combining roof venting systems cause short cycling?

I'm looking into buying a new house here in Wisconsin that has soffit vents, ridge vents and some additional static roof vents installed. However, when the home inspector came through he said that ...
3
votes
2answers
2k 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 ...
1
vote
0answers
234 views

How can I unclog a passive bathroom air vent?

I live in a prewar apartment building. At the top of the shower, on the wall where the water comes in, is a passive vent. There is no powered fan that is installed and no nearby electrical wiring to ...
4
votes
1answer
244 views

Can I Use 4" CPVC Pipe for a Dryer vent?

Can I use 4" CPVC pipe to extend a dryer vent in my garage?
5
votes
1answer
1k views

Can I attach a kitchen vent and a dryer vent to the same exhaust?

I currently have a dryer attached to an exhaust vent with flexible tubing; this flexible tubing is in severe need of repair. That is (I hope) easy enough, and is not the crux of my question. The ...
7
votes
1answer
1k views

How much vent fan throughput do I need for my bathroom?

What minimum size (CFM) vent fan do I need per cubic foot of bathroom? Consider a bathroom that is 10ft. X 4ft. X 6ft(height). What is the minimum throughput rating for a vent fan? I want a vent fan ...
2
votes
1answer
286 views

How to remedy noisy air ducts?

I have forced air extraction with a duct running through one classroom then a second. The classroom which is ducted closer to the fan receives much greater air flow through its vents. To combat ...
12
votes
5answers
816 views

Is it dangerous to run electrical cords through heating vents?

I'm living in old apartment and my roommate has fed electric cords through heating vent from living room into bathroom. I see this as a double hazard and illegal. The heating vent exits on wall behind ...
2
votes
1answer
380 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 ...
6
votes
5answers
5k 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 ...
5
votes
2answers
420 views

Can you have different types of vents on a single roof?

The attic of my house has serious ventilation issue and the sheathing becomes rotten. The roofing contractor suggests me to replace the rotten sheathing and install some ridge vent. His plan will ...
-1
votes
1answer
293 views

Why do I have a large PVC pipe venting warm air outside intermittently?

There is a large PVC pipe (3 actually) which vent air intermittently. I started noticing I could see steam rising over my deck in the morning and then I found that these pipes vent air at least a ...
1
vote
1answer
160 views

Should I tie into the ERV or just vent outside to increase bathroom ventilation?

Our bathroom currently only has an intake connected to the Energy recovery ventilation (ERV) to remove humidity, and it's completely inadequate even for a quick shower. Should I install an exhaust fan ...
0
votes
1answer
462 views

Can I install a (probably ductless) range hood against brick?

I'm thinking about making an offer on a 1930's house that needs a few improvements. The gas stove/range isn't situated against an exterior wall. Rather, it's placed against the back side of the brick ...
2
votes
1answer
887 views

How do I install a vent above a closet door?

I located some home theater gear in a closet directly behind our family room where the TV is located. Now the closet, a sizeable walk-in, is getting rather warm. How do I install a simple vent above ...
4
votes
2answers
2k 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 ...
6
votes
4answers
3k views

Can I vent my dryer into the crawl space without creating mold and moisture problems?

We have a crawl space with a combination of sandy and clay soil in it. The crawl space is about 3' deep. To eliminate a long dryer vent run, I'd like to vent the dryer directly into the crawl space. ...
2
votes
3answers
613 views

Is it safe to use a former furnace flue to vent my dryer through the roof?

Our dryer is located in the center of our house. The current vent situation has tubing that makes several bends between the dryer and the crawl space before hitting metal duct that takes it about 25' ...
2
votes
3answers
2k views

Should I install an exhaust fan in a new garage?

I'm having a new garage built in my home and I'm wondering if it's a good idea to have some sort of ventilation/exhaust/fan system installed while they're at it? I'm thinking of doing some spray ...
2
votes
1answer
384 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 ...
3
votes
3answers
3k views

Is installing a gable fan worth the investment?

We have 2 gable vents in our roof (approx 2' high or so), one at either end, and upon inspection it does not appear that there is really enough overhang in the roof for soffits. I still have to ...
1
vote
0answers
355 views

Is it possible to retrofit an external kitchen fan in an existing house?

I have a 2-storey half duplex that was built in 2008. The kitchen (1st floor) has a range hood fan that exhausts to the side of the house through 8" aluminum duct. The outside vent is not directly ...
1
vote
0answers
572 views

Is it advisible to block a bathroom vent due to cigarette?

I live in an apartment, and there's cigarette smell coming from the bathroom vent (probably from a neighbour who smokes). I'm wondering is it advisable to block the bathroom vent to block the smoke ...
4
votes
1answer
696 views

Can I use the white from one switch, but the black from another?

Some terminology, because I don't know any better: light-fixture - An existing, separate, light fixture...currently with dedicated 14/2 vent-unit - A new vent just installed, has three ...
1
vote
3answers
1k 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 ...
2
votes
2answers
750 views

Can I vent a basement bathroom into a semi-enclosed crawlspace under an attachment?

I'm refinishing my basement bathroom and installing a vent. I can easily vent out to this wall, but the thing I'm worried about is it's semi-enclosed. In the winter we put up tarps and store wood ...
5
votes
3answers
3k views

Do I need a rain\snow cover on this furnace vent?

Just bought a house that had a new furnace installed this summer. Vent number 1 in the image is for the furnace (2 is the water heater and 3 is sump). As you can see in the image, 2 and 3 both would ...
2
votes
2answers
1k views

What's the best way to shore up a ceiling register that is loose?

I have a few ceiling registers which are not flush with the ceiling since the duct has loosened over time. What's the best way to get them flush with the ceiling? I thought about driving several ...
2
votes
1answer
1k views

What can be done about this unattractive dryer vent?

The house I bought has dryer vent that runs from the dryer into the ceiling. Besides being an eyesore it is also loose/flimsy. I'm redoing the laundry room and would like to make this more ...
2
votes
1answer
332 views

Is it possible for wind driven rain to be forced into soffit vents? [duplicate]

Possible Duplicate: Can wind force rain into the soffits? Apologies if this question was asked before. I've recently noticed slight paint peeling in two ceiling locations, right next to ...
2
votes
1answer
847 views

Do I need soffit vents for my knee wall attic?

I purchased a 55 year old home that has no soffit vents. The attic space consists of a knee wall attic space and peak attic space. The peak attic space has vents at each end and a ridge vent at the ...
7
votes
1answer
2k views

How can I catch more lint in my dryer?

In the 3 story townhouse I'm currently in, the contractor originally built the (stackable) dryer vent to go straight up from it's location (top floor), then when it gets above the ceiling, it angles ...
5
votes
2answers
666 views

What kind of vent is pictured here and what are its uses?

While my roof was being replaced, I requested that they install two roof vents. One for laundry and one for bathroom fan. They installed two of these. I just tried connecting the bathroom fan to this ...
6
votes
1answer
2k views

How can I lengthen my vent stack and are there any negative effects in doing so?

I have observed that when we receive a lot of snow here in Ontario, at least one of the drain vents on my roof is covered by snow. While after one winter in the house I have not yet observed any ...
3
votes
2answers
428 views

Bathroom air vent drip

I have a constant drip coming from the air vent in my downstairs bathroom. After one week it has filled a bucket full of water. There has been no snow or rain in my area. The air conditioning hasn't ...
5
votes
1answer
7k views

How can I properly vent a basement toilet & shower using an AAV?

When we bought our house the plumbing drains for a basement bathroom were roughed in but they did not install any vent lines for them. We have the first floor plumbing draining into the main stack ...
9
votes
4answers
20k views

What is the purpose of a bathroom exhaust fan?

Okay I actually do understand the purpose of the bathroom fan; it gets the steam out of the bathroom after a super hot shower, right? Well turns out I NEVER turn it on. I suppose I don't shower in ...
1
vote
1answer
453 views

How can I vent a range hood that's not on an exterior wall?

I want to vent a range hood out and it is not on an outside wall. I have already installed 12X3.5 duct into the attic through the cabinet and ceiling (visable). the 90 turn and wall cap are 10X3.5. ...
3
votes
1answer
938 views

How can I reduce whistling due to wind across a gas fireplace vent?

We have a gas fireplace venting through the roof of our attic bedroom; there's a cap on a chimney up there. Double-wall construction, such that it pulls combustion air in from outside. When the wind ...
8
votes
2answers
9k views

What are my options for venting a bathroom exhaust fan?

I would like to install a fan in our bathroom which currently has none. However, I'm very confused regarding the best approach for this. Above the bathroom is an attic space. I have read that ...
3
votes
1answer
488 views

How should I go about fixing a holey laundry room?

When I removed some old elevated cabinetry in my laundry room, I discovered two holes in the wall. The first I documented here, How do I close and seal an old external vent? and the second can be ...
3
votes
1answer
662 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 ...
6
votes
2answers
3k views

Do I need soffit vents when I have 2 gable vents and 5 normal peak vents?

We are in southeast Idaho, have a plain simple gable roof on a 1,050 square foot floor house; the roof's pitch is not great, probably 3 or 4/12 but normal for our area. We have 1 vent at each gable ...
1
vote
1answer
851 views

How can I modify this dryer vent cap to keep lint from getting trapped?

As mentioned in this question I installed this dryer vent cap on my roof As you can see, there is a gap between the flashing and the cap, presumably to let water out if it gets in. This is ...
2
votes
1answer
1k views

Moving my washer and dryer will mean I'll need to move my dryer exhaust vent. How should I go about this?

I live in a two-story condo/townhouse. My dryer is downstairs in the kitchen and I'd like to move it upstairs. Right now, the exhaust vent runs up through the wall and under the upstairs bedroom ...
5
votes
2answers
12k views

Maximum run on drain?

I'm planning a reconfiguration of my basement and want to move both the powder room and w/d to new locations. The powder room would be close enough to the stack not to worry me, but I'm looking at ...
5
votes
1answer
860 views

How can I vent this dryer?

I am installing a mini washer/dryer into a second story bathroom. I want it to be the safest and easiest installation that I can do myself. I understand the basics: minimum 4" diameter tube. Use ...
1
vote
0answers
507 views

How do I ventilate a bathroom through a small window?

I've got a very small bathroom without a vent fan. Since it is in a condo among a lot of others in a large building, a standard vent fan cannot be installed. However, I do have a small window and was ...
5
votes
2answers
1k 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. ...
4
votes
1answer
1k views

Attic ventilation - intake:exhaust ratio vs total ventilation area?

I have decided to go ahead and install a ridge vent in my house. The only current attic ventilation is soffit venting on one side of the house. As part of this project, I am attempting to determine ...