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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9
votes
7answers
12k 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 ...
8
votes
2answers
9k views

What are the pros and cons of soffit vents vs. roof vents?

During my latest foray into the attic, I discovered that my bathroom exhaust fans vent directly into the attic. I'm worried about moisture buildup and I'm considering routing the exhaust to an ...
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 ...
7
votes
1answer
2k 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 ...
7
votes
2answers
757 views

Is there any legitimate reason to have a direct vent between utility room and attic?

I've been doing some sealing and insulating in my attic, and discovered a purpose built vent directly from the utility room into the attic space. See most of these photos The house is in a ...
4
votes
3answers
5k 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
2answers
893 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 ...
5
votes
2answers
2k 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. ...
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 ...
2
votes
2answers
561 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 ...
2
votes
1answer
471 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 ...
2
votes
1answer
2k views

How to properly vent attic in windy/snowy areas to avoid snow infiltration?

To ask the other part of question: How bad is it to have wet insulation? that didn't get asked... How do you deal with homes that are in high wind and snowy areas which are susceptible to snow ...
2
votes
3answers
6k views

Can I vent a microwave vent / range hood through wall?

I've got a Whirlpool over-the-range microwave that is currently venting back into the kitchen. I'd like to poke a hole through the wall and vent it directly outside. I've read the instructions and ...
1
vote
2answers
966 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 ...
1
vote
2answers
5k views

How do I connect a dryer to a dryer vent?

I just moved my dryer (gas) a couple feet to a better location in the basement. It is actually now closer to the existing dryer vent to the outside of the house. The previous owner has it connected ...
1
vote
4answers
3k views

Are there efficient ways to provide combustion air to heating appliances?

In a previous question we established that there probably should be a vent between my utility room (which opens into the kitchen and living space in general) and the outdoors (in my case the attic, ...