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
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1answer
111 views

How should I install a bathroom Exhaust Fan on 2nd Floor?

I would like to install a bathroom exhaust fan in my 2nd floor bathroom, due to moisture issues. There is no existing fan, only a light fixture. There are two exterior walls in this room and the attic ...
1
vote
3answers
1k 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
5answers
3k 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
271 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
243 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 ...
2
votes
1answer
36 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
1answer
60 views

How to get fresh air to flat without letting noise in

My flat is at 4th floor just next to very noisy street (cars/trams); above my flat there's only roof (no other floors or attic). I have problems with fresh air inside because I try to keep my windows ...
1
vote
4answers
1k views

Do I need a vent fan in an interior laundry room?

I am renovating a few rooms including an existing laundry room. It currently has one exterior window and another openable window onto an existing mudroom (which also has exterior windows). After the ...
3
votes
1answer
136 views

Need guidance for venting a new rough-in for basement bathroom

I'm currently finishing my basement, and I wanted to rough-in plumbing fixtures for a future basement. I've already got the layout, but I just need to figure out the venting for the drawing for my ...
1
vote
1answer
19 views

Gas dryer vent install, how close to wall?

I am installing a gas dryer, I understand all the requirements, but cannot find anything that addresses this question; my install comes out the back of the dryer and goes vertical about 4 ft, then ...
14
votes
10answers
16k 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 ...
2
votes
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 ...
14
votes
6answers
1k views

Is it dangerous to run electrical cords through heating vents?

I'm living in an old apartment, and my roommate has fed electrical cords through a heating vent from the living room into the bathroom, up to a power bar on the side of the sink. I see this as a ...
1
vote
0answers
19 views

Why does the Hartell Reservoir style pump require no venting, while the Little Giant Drainosaur does?

Why does the Hartell Reservoir style pump require no venting, while the Little Giant Drainosaur does? See links below for more info on pumps Hartell Pump Little Giant I am having a hard time ...
4
votes
0answers
50 views

Why does my stove vent fan take time to turn on

The vent hood is quite old. For some reason when I flip the switch to turn it on it takes 10-30 seconds to actually turn on. I've checked it and there's no power flowing for those 10-30 seconds. ...
0
votes
0answers
17 views

Motorized vent for fresh air

I'm looking to set up a more optimized ventilation system in our house. Today we blow out air in the bathroom and have 3 passive vents letting fresh air in, distributed throughout the house. During ...
0
votes
1answer
80 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
1answer
82 views

Bar sink drain/vent

I am in midst of finishing the roughed in full bath and want to put a bar sink on the wall behind the tub. I will add pictures later- once I am able to get some good shots.... The way it was roughed ...
2
votes
2answers
64 views

Are there optimal positions for A/C and heat register grills to be facing?

I noticed a while ago that some of my A/C and heat register grills are facing the walls and not the room (the insides of the curves on the grills face the walls) in some rooms but not in others. My ...
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 ...
1
vote
1answer
48 views

What are my options on location of a bathroom fan vent in Wisconsin?

I just put in a new bathroom fan and notice the previous one was vented into the attic. I understand this can cause mold after awhile. I live in WI where we see a lot of snow. I was told the roof ...
1
vote
0answers
26 views

Trickle vent - surface and airflow

If a trickle vent is rated at "2000 mm2", does it mean that one needs to drill holes in the window frame that have a total surface of 2000 mm2? How many liter per second or m3 per hour would such a ...
1
vote
0answers
33 views

How to best connect this microwave to the exhaust vent?

I'm trying to connect my microwave to the existing exhaust vent. The problem is that the microwave is about 1 inch to the left of the actual vent. This is the part that I'm struggling with. I have ...
0
votes
0answers
48 views

Connecting dryer vent in new window

We just had some old windows replaced with glass block in the basement. The installers added a window with an attachment to vent the clothes dryer but, of course, it's different to the one in the old ...
7
votes
1answer
106 views

Decrease dust in an old house, forced air

My house was built in 1940. I have noticed the forced air pushes out a lot of dust. This is evident from lint collecting on the bathroom vanity below a vent. It only collects lint during Summer and ...
6
votes
6answers
7k 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. ...
3
votes
1answer
378 views

Dryer vent passing through two wooden beams. Is it safe?

I have a dryer vent that exits the house wall through two wooden beams. The vent is built using two corner rigid pieces and one long rigid aluminum piece. The long rigid piece is the one that passes ...
2
votes
0answers
33 views

Replaced a Heat/Light/Vent with a vent only. There does not seem to be a hot wire:

The three gang box previously had a HLV combined switch plus a switch that operated a separate light. Stupidly, I removed and discarded the switches and units (light and HLV) without studying the ...
0
votes
0answers
33 views

How can I reduce the noise caused by a booster fan?

The previous owner of my house installed a booster/fan about 2 feet away from one of the bedroom registers. This causes excess noise in that bedroom. The fan is about 40 feet away from the main ...
5
votes
3answers
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 ...
1
vote
0answers
52 views

Can a cheater vent be installed in a vanity drain that maybe running into a roof vented drain?

Can a "cheater vent" be installed in a vanity drain that MAY be running into a roof vented drain? All p-trap , tail piece is new and drain line has been cleaned with a drum auger netting no major ...
0
votes
0answers
67 views

Why Is My Dryer Vent Electrically Charged

I recently purchased a home built in the 1980s. When I went to hook up my 3-pronged dryer cord (with L), I noticed the outlet is the old 3-prong (all straight) typically used for ranges. I switched ...
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2answers
90 views

Should our kitchen sink vent through the roof?

Our kitchen sink vent pipe goes up through the ceiling but not through the roof, should it go through the roof?
6
votes
1answer
121 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 ...
10
votes
4answers
36k 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
2answers
169 views

Is 150 CFM ventilation fan right choice for bathroom in my older condo?

My bathroom ventilation fan broke up and I am shopping for a new better one. I noticed the newer fans are higher CFM through-put and are quieter, I have narrowed down my choice to this one. My ...
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, ...
3
votes
2answers
717 views

Timer needed on bathroom vent fan?

Does the International Building Code (IBC), or International Residential Code (IRC) require a timer on bathroom vent fans? (I realize all code is local, but just trying to get the standard rule.)
0
votes
0answers
61 views

How should I wire this 3 switch box in my bathroom?

I have a 3 switch box and the bottom switch that controls the heater was broken so I replaced it and I can't remember how to wire it, tried 10-15 combinations and it still doesn't work, not sure how. ...
0
votes
0answers
88 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
4answers
19k views

How to make a 6 inch hole through a brick wall for venting

I'd like to vent my range hood out through an exterior brick wall. How would I go about making a 6 inch hole for the vent? I'd guess I'd use a masonry chisel to chip out the mortar and then pull ...
1
vote
0answers
47 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 ...
0
votes
2answers
1k 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 ...
2
votes
1answer
59 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
59 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
4k 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 ...
1
vote
0answers
140 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
102 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 ...
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 ...
3
votes
3answers
322 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 ...