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
298 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
845 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 ...
7
votes
5answers
817 views

Can too much ridge ventilation be detrimental?

At my house in central Texas, where temperatures can persist at 86 - 110 degrees Fahrenheit, one side is always hot, no matter how long the A/C runs. That attic space is considerably hotter than other ...
0
votes
0answers
243 views

Can I reuse an abandoned roof vent?

I have a house that has an old 8-10 inch diameter vent that used to be used as stove/oven vent. I think that newer gas ovens don't require venting like a water heater needs (ie they don't have a ...
1
vote
0answers
124 views

Is this the correct way to vent my roof?

We recently bought a 1950s vintage house with no soffits, i.e. no roof overhang. Thus there are no soffit vents in my attic, only a ridge vent and 2 gable vents, one with a powered fan. However, those ...
2
votes
2answers
1k views

Can I clean a second story dryer vent that goes out the roof from the inside?

My dryer vent goes from the second story to the roof. The problem is that I can't reach the roof. I bought one of those dryer vent cleaners that you can put on your drill and spin it up the vent. ...
1
vote
2answers
207 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 ...
2
votes
3answers
1k views

Properly venting a gas water heater

Ahh, the joys of an old house. The former owners of my house did some funky stuff with venting the water heater. Let me explain: the water heater is in the basement there is a 3 in single walled ...
7
votes
1answer
628 views

Why did an HVAC installer add this PVC pipe?

We recently had a VERY old central heating furnace replaced and I noticed that the HVAC installer added the following PVC pipe shortly before the inspector arrived: The metal vents were already ...
2
votes
1answer
216 views

How can I divert wind which is flowing parallel to the wall into the house?

Situation: The house is surrounded by other structures in a way that the the wind direction remains parallel-horizontal to the wall. There are a couple of windows on that wall, but amount of air ...
5
votes
1answer
740 views

Is this an appropriate drain design for adding a shower?

I recently took on the challenge of adding a shower to my existing downstairs bathroom. The bathroom is inside what used to be the garage so it is far away from any existing vents. After some demo, ...
2
votes
1answer
172 views

Dryer vent pipes touching copper hot water pipe

I am installing a long clothes dryer vent in the crawl space under my house to replace the old one. I am using a combination of both flexible metal pipes and rigid stove pipes to try to reduce the ...
0
votes
1answer
81 views

Gable Vent Fan to Make Usable Attic Storage Space - Useful or Trouble?

We have a "mini attic" in addition to the main attic. The mini is above the 1st floor kitchen and on the same level as the 2nd floor. It has an access door in the bedroom closet. My wife would ...
2
votes
1answer
569 views

How effectively a pedestal fan blowing inward can bring the outside air if kept 2 feet away from a fully open window?

other Facts: Window(s) size 3.5 feet* 5 feet (width) Fan (2 nos.) Specifications Product page - specifications Sweep size: 400 MM RPM: 1280 Air Delivery: 75 CMM (What is the formula to convert ...
2
votes
1answer
295 views

Why do they put an A/C vent in the utility room?

A related question is here about a year ago: Is there any reason to not tape this vent over? My question is, why do they put the vent there in the first place. Like the previous poster, I just bought ...
3
votes
1answer
845 views

Should I block off the soffit vents in the vicinity of my bathroom exhaust vent which is in the soffit?

I've seen the other threads on here warning against venting a bathroom fan to a soffit: People warn against the moist air heading right back up the surrounding soffit vents and into the attic ...
4
votes
1answer
383 views

What is this pipe called, and how does it work? (Round II)

OK, thanks for people's help on my last question, now I've confused myself again. I came across this picture, similar to the last question, but I don't think it's a cleanout. It looks like a vent to ...
3
votes
1answer
192 views

How much attic ventilation is needed?

My roof already had the ridge and soffit vents and gable vents. Does it need attic fans/rotary turbines as well? I heard that I should close off the gable vents to let the ridge and soffits do their ...
5
votes
2answers
1k views

What is this pipe called, and how does it work?

I recently saw a plumbing setup where a 2" pipe was run from a bend in the 4" toilet return. The 2" pipe bent upwards to meet the floor next to the toilet, where it was capped off with a removable ...
2
votes
3answers
172 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 ...
2
votes
1answer
136 views

How to install vinyl tubing for bathroom vent?

I need to replace the vinyl tubing that goes from my bathroom ceiling to the side of the house. It had a rip in it and I was successful in pulling it out. I went into the attic crawl space and ...
1
vote
3answers
609 views

Would a normal ethernet cable survive the conditions in an air conditioning vent? [duplicate]

I am currently renting a flat, which prevents me from making modification to the walls. However, I still would like to run ethernet cables between rooms. Between all the rooms, there are AC vents ...
0
votes
2answers
3k views

Is it better to leave the door open or run the fan while showering?

I want my bathroom door open while showering, and I don't want to have to turn on the fan. My husband wants the door closed and the fan on. Our bathroom seems to accumulate mold regardless of which ...
3
votes
1answer
168 views

How do I install a bathroom exhaust system?

We are set to close on our house in about three weeks and one of the problems that the inspector noted was that the vent in the guest bath vents into the attic (never going outside) and the master ...
1
vote
2answers
2k views

How do I locate a dryer exhaust vent?

I live in an older duplex. I just recently attempted to clean out the dryer vent/duct for the downstairs unit and failed because I could not find where my dryer vent is outside. Is it possible that my ...
4
votes
3answers
11k 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 ...
5
votes
1answer
513 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
3answers
8k 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
310 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
323 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
2k 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
3k 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
383 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
1k 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
657 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
15k 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
588 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 ...
0
votes
1answer
342 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
205 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
640 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
2k 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
3k 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
6k 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
803 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
3k 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
559 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
5k 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
520 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
766 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
770 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 ...