Questions tagged [exhaust-fan]

For questions about exhaust fans -- i.e. fans used to remove air from specific rooms in a building and exhaust it to the outside in order to control humidity and/or combustion products. Exhaust fans, unlike [ceiling-fan]s, are installed into the building's structure, either in a fitting within the room's ceiling, or remotely, drawing air from the room via a duct and grille.

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Must I use both cables running to my bathroom fan?

I have two cables running to exhaust fan hook up, each cable with one white and one black. Do I need both black and both white from the cables with the one black and one white from the new exhaust fan?...
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2answers
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Wiring Bathroom Exhaust Fan With Heater

Unfortunately I did not take a picture of how the original fan was wired, but I have 5 wires going to the fan, and the fan appears to have connections for 7, help? Schematic: Wires to the unit: ...
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4answers
440 views

Combatting moisture in crawl space after venting window is sprayed with insulation?

I had a crawl space (top left) in my house which had a 12"x6" venting window. There is a room above the crawl space, so I decided to spray the walls of the space with closed-cell foam insulation which ...
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1answer
539 views

Fan humidity switch doesn't install

I'm trying to install a humidity sensing switch for a bathroom fan that requires a neutral. There are two switches in the box, one for a light, one for the fan. There are 3 white wires (assuming they ...
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0answers
2k views

Using PVC pipe for bathroom exhaust fan duct

I have to run a length of about 3 meters of duct (from the fan to the outside), where there will be 2 90° bends. I was going to use plastic flexduct, but I can make the bends bends and some of length ...
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2answers
200 views

Why is my bath exhaust fan noisy only when installed in the ceiling box?

The house and fan are 45 years old. The fan in the guest bathroom sounded like a jet plane since we bought the house, but we finally decided enough was enough after some house guests complained. (Note:...
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1answer
1k views

This range fan drips water

I have this model range fan from NuTone. Condensation from steam (say when boiling water) forms on the underside of the unit and retaining bar that holds motor that drips back down onto the range. ...
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3answers
4k views

Why don't whole house fans vent to the outside?

I've been researching fans and the ones I've found all seem to vent to the attic. Why is that? Why can't they vent directly to the outside? It seems more efficient that way. Otherwise you have to have ...
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0answers
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Can mold growth be removed and cleaned up in a two-story apartment building successfully?

I live in an apartment building that has 24 units which all the bathrooms vent into the hollow walls or their neighbors bathrooms upstairs. (so in their ceiling, the smell and moisture comes out ...
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2answers
722 views

Should I vent 2nd floor bathroom exhaust down?

I am looking to install an exhaust fan in a bathroom where one does not already exist. I've read that it is preferable to run exhaust ducts down instead of up, but does that apply here? We would be ...
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1answer
434 views

Turn on one light, when another is turned off

I just bought a bathroom fan which needs a seperate wire to control the fan, light, nighlight and humidity control. Each one is designed to be wired to a separate switch, not an ideal design. I'm ...
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2answers
1k views

Vent AV closet into attic

I have a small closet (4x6) that I use to house my AV equipment (receiver/consoles/etc). This works great, but as the closet is in an upstairs room it gets quite warm in the summer. I would like to ...
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1answer
9k views

Air conditioning with exhaust fans between two rooms

I'm renovating a space where there will be a partition of 2 rooms (3m height, dimensions are approximates, high humidity location, 23-34degC avg outside temp) Room 1: 5x7m Room 2: 2x7m Room 1 will ...
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0answers
98 views

Replacing Exhaust Fan in Bathroom and connecting to semi rigid aluminum duct

I am replacing my exhaust fan in the bathroom and having a hard time connecting the new fan to the aluminum semi rigid duct, because is hard to compress, extend or curve. How can I make this easier ? ...
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2answers
352 views

Upgrade bathroom light and separate exhaust fan

I Have a small bathroom and it has a light that is separate from the exhaust fan. I want to upgrade it to a light and fan combo. Can this be done easily without having to go into the attic? I ...
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1answer
45 views

In-line fan installation

Can an In-line bathroom fan be installed horizontally or just vertically ? Been searching all over but no manufacturer specify that on their guide. Thank you
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2answers
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Are there drawbacks to installing a stronger bath fan?

I have a bathroom fan that doesn't seem to be doing the job. I'd like to replace it with something that has much higher CFM (jet speed); is there any reason not to do this? Is it possible that it can ...
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1answer
8k views

How to improve light quality from a bathroom exhaust fan?

I have an interior bathroom with no windows. In the ceiling is a NuTone 763RLN exhaust fan with light bulb fixture. This unit was built in 2003, so the only light bulb specification provided is "100 ...
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3answers
5k views

Reducing humidity with a fan: top or bottom?

In the basement of my apartment block we have several little storage rooms (~65 sq ft), one for each tenant. Inside of mine the humidity gets a little high to my liking because although it has 2 holes ...
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1answer
40 views

Kitchen fan venting

I am installing a kitchen fan about 9' away from the nearest external wall. The wall there is very narrow and all I can fit there is a dryer type vent that works with 4" round pipe. Also, my spacing ...
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1answer
462 views

Old extractor fan hole leaking water into new kitchen

We had a new kitchen fitted last year, including a new extractor fan above the gas hob. When the previous extractor was removed it revealed the drilled hole and pipe which although lined up perfectly ...
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1answer
40 views

Cold bathroom that has exhaust

So I have started to notice the bathroom with an exhaust is starting to get really cold as the temperature is getting colder. Is there something I can do about this? Should it really be that much ...
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2answers
14k views

Seperating bathroom light and exhaust fan on single switch

I have a single switch that turns on both the bathroom light and a separate exhaust fan at the same time. I want to change this to be able to power them on independently via a dual rocker switch or ...
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1answer
173 views

Replacing bathroom fan - hums

Purchase new bathroom fan (not a big project guy but this seems pretty straight forward). Hooked up wires, white to white, black to black and green to green. Connected power and turned on fan. It just ...
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1answer
4k views

Adding exhaust fan to existing single light switch

I have added an exhaust fan in bathroom to an existing single light switch that operates one light. I'd like the switch to turn the light and the fan on together. The existing switch has one feed of ...
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2answers
6k views

bathroom fan does not turn on, just hums for 2 minutes then finally starts up

Lately every once in a while, when I turn on my bathroom fan, it does not start up. Rather there is this low humming sound for about 2 minutes. Then finally, the fan starts to run. Why does this ...
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5answers
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Exhaust fumes seeping into our 4th floor apartment at night through bathroom and shower vents/fans

This is our second fall/winter in our 4th floor apartment, and we've noticed that whenever the weather becomes cool, exhaust fumes which seem to come from the garage in the basement of the apartment ...
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1answer
284 views

Clickey clackey bathroom exhaust louver

I have a bathroom exhaust vent with louvers similar to the image below. It vents out the side of the house above the bathroom between two bedrooms. When it's breezy out, the flaps rattle so that it ...
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1answer
4k views

Ceiling exhaust fan in kitchen

We have both a range hood and an exhaust fan in our kitchen. I'm not really sure that the range hood actually exhausts outside the house, as there's not much room (a couple inches) behind the ...
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2answers
22k views

How can I quiet a bathroom exhaust fan that became loud only after the duct was added?

I had a fan added in my bathroom. Surprisingly there wasn't one at all. When the fan was first installed they had it venting into the ceiling. It was a .5 sone fan and you could hardly tell that it ...
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1answer
1k views

How can I add a bathroom fan to the existing end line light switch?

I would like to add a bathroom fan to the existing end line light switch. I am fine with the switch controlling both the light and fan at the same time as the light only has 14-2 running to the ...
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0answers
203 views

Can a horizontally-vented kitchen exhaust have a downward-facing outlet in a soffit?

Can I vent a kitchen exhaust fan horizontally to an exterior soffit, ending with a downward outlet/cap? (Or must the outlet be horizontal (through a wall) or upwards (through a roof)?
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2answers
1k views

Switch working intermittently

My master bath has 2 switches. The switch on the left (1) goes to the light. The one on the right (2) goes to the fan. The light works fine. The fan only works intermittently. It takes 2-3 flips ...
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2answers
5k views

Can I connect the exhaust vent from my range hood to the existing ceiling exhaust fan vent?

I recently bought a condo that I discovered after the fact to have a "Recirculating Range Hood" over my gas stove. My smoke alarm consistently sounds off when I cook. My HOA has denied multiple ...
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1answer
882 views

Home: Using Exhaust & Circulating Fans to Improve Air Quality While Staying Cool

In the hopes of ventilating nasty odors and airborne contaminants, I recently installed the Bionaire BW2300 in one of my kitchen windows. This is the only one I have installed in my home at the moment....
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4answers
1k views

Dryer Vent Exhaust Fan

My wife and I just bought our first house. I think that we discovered that our dryer vent is going to require some regular maitenence to keep it clean and able to dry our clothes. When we moved in, ...
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1answer
4k views

Maximum length for bathroom extractor/exhaust fan vent

Our bathroom extractor fans are vented into the attic of our ~70yr old house in Philadelphia. According to our home energy auditor this is pretty common here. We want to vent these to the outside ...
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1answer
2k views

replaceing a toggle switch for EXHAUST fan for small bathroom with a rocker switch

I have a bathroom with two separate toggle switches; one for the light and one for the exhaust fan. I have updated the light switch with a dimmer/motion sensor rocker style switch. Now, my question is:...
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1answer
151 views

light and fan. together but separate

Currently I have a switch that turns the light on and off, and a second switch that turns the fan on and off. I would like to make it so the fan can only turn on if the light is on as well. But if the ...
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1answer
633 views

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

I just put in a new bathroom fan and noticed 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 ...
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1answer
5k views

How to wire multi-control rocker switch

What's the correct way to wire a multi-control rocker switch (e.g. Leviton 1755) that has three switches on one yoke with a common supply? What wire(s) do I run from the switches to each of the loads?...
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1answer
1k views

How should I install a bathroom exhaust fan in a 2nd floor bathroom?

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 ...
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5answers
36k 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 ...
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1answer
1k views

rewire ventilation fan to use pull chain instead of wall switch

I'm converting part of an unfinished space to make a darkroom. I'm installing a bathroom ventilation fan over the sink but there is no convenient place to install a switch for the fan. I purchased a ...
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0answers
747 views

Fan speed control with timer?

I'm looking for a device that will allow me to control the fan speed as well as have it timeout. In theory this might work if I used the output from the timer to feed into the dimmer, but it doesn't ...
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1answer
130 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 ...
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1answer
178 views

Is it code compliant for a new construction bathroom vent (no shower) to go down and then over?

I have a challenge on my second floor where a curved steel roof insulated with spray foam makes the best option for a half (toilet/sink) bathroom fan's vent to route down and laterally out the side of ...
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1answer
471 views

Will a Broan 750 fit in the same cutout as a NuTone 8664RP?

I would like to replace a 'disappointing' bathroom ceiling exhaust fan with some other brand, but have the challenge of predicting what is compatible with the existing drywall cutout. Few online ...
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1answer
275 views

How do you wire a 3 switch box in a bathroom?

I'm replacing an old outdated 3 switch unit with a newer one to match the rest of the bathroom. One switch controls a light, one controls the exhaust fan, and the third controls a heating element. ...
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2answers
682 views

Gable venting a bathroom fan and kitchen range hood

I am planning on venting my bathroom fan and the range hood in my kitchen out the gable end of my house in separate runs. The gable end is above a gable roof, so I am hoping for some recommendations ...