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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1answer
474 views

Belt and pulley fell off 40" attic fan & my repair failed (updated)

Summary (also see photos of fan and motor below) Update 2: I bought a capacitor for small dollars and now the fan works again, perfectly. Update 1: Capacitor was indeed broken (see photo at end) ...
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0answers
56 views

Is this large exhaust fan in bathroom installed right?

This window is right where the shower is. Can't have any fan but there. It opens upwards. Hired someone to install this fan but his idea was what you see in the picture. It's not sitting flush on the ...
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1answer
657 views

Convert bathroom exhaust fan/light combo to light only with 3 way switches

I have a Nutone exhaust fan/light fixture in my bathroom. The fan and light are each controlled by their own 2 pole switch, one is inside the bathroom and one is outside. I want to replace the ...
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1answer
19k views

Bathroom fan leaks during heavy rains

My bathroom fan leaks water during very heavy rains. It is on the first floor. The exhaust is also on the first floor on the side of the building, not the roof. The fan is on the ceiling and ...
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1answer
550 views

Disconnected Loud (IMO Useless) bathroom exhaust fan

Moved in to my apartment recently. The bathroom ceiling exhaust fan has been unbearably loud. I called my landlord maintenance and they only made it worse (they thought the problem was the light ...
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1answer
246 views

Bathroom fan sizing in 2 room bathroom with always open doors

I have a bathroom fan that died recently. It is a basic Broan from the 90's, 50CFM and 2.0 sones. I want a quieter fan for sure, but I'm not sure on the sizing. As shown in the picture, our ...
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1answer
4k views

How to connect a 3 wire plug to a 2 wire outlet?

Bought a vent fan that came with 3 wires, but homes here are only 2 wires (not sure which but no ground). What to do with the extra neutral wire? Should i cut it or twist it with the other two??
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1answer
132 views

BathroomExhaust fans run continously? [closed]

How much energy is wasted for the continuous operation of two bathroom exhaust fans? Why are the wired this way?
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1answer
1k views

How can I vent my kitchen exhaust through vinyl soffit?

My 1950s ranch had a loud, ineffective kitchen fan that I decided to fix up this weekend. Turns out that when a previous owner had vinyl siding added, they simply put the vinyl over the vent. I ...
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3answers
737 views

How can I wire this bathroom fan into the middle of an existing circuit?

I am upgrading a bathroom fan from below (no attic access) and replacing the single pole switch with a timer switch. I’ve wired switches and outlets before, but this one is throwing me for a loop. I ...
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1answer
68 views

How can I remove exhaust pipe cover that's sealed with silicone?

I want to remove and replace the exhaust pipe cover shown in the picture below, but I can't get it off. The wall is made up of (in the order from outer most material to the inner most material: ...
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2answers
3k views

How can I vent a bath fan with no access to exterior?

We are redoing our bathroom and just discovered when we were replacing the fan that is wasn't vented out anywhere. How can we vent now? It's between floors with no windows and a brick wall. The only ...
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1answer
1k views

Connecting a bathroom fan/light combo?

I'm replacing my old bathroom fan with a new fan/light combo. The new fan/light has four(4) wires, but the existing switch has only three(3) wires. How do I wire this set-up? There are white, blue, ...
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0answers
584 views

How can I add a dimmer to a bathroom switch that also turns the fan on?

I would like to add a dimmer switch to the bathroom. The switch currently turns on a extractor fan with a timer. It is connected via an isolation switch. I understand I cannot run the fan on a dimmer ...
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1answer
147 views

bathroom exhaust venting to a roof vent

I am disconnecting a bathroom exhaust fan that is vented to a roof vent in my attic. This caused condensation/moisture in my attic, which became apparent on these cold winter days. Some of the ...
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1answer
824 views

Can I place ventilation ducting on top of joists if there is space?

I'm installing a ceiling-mounted extractor fan above a kitchen island. The problem is with the placement of ventilation ducting in the ceiling: the joists are running in the opposite direction to the ...
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1answer
104 views

Extending a hard-to-access exhaust fan duct

Just pulled out an old bathroom fan. It was screwed to a 12-inch-long piece of non-flexible duct (so it came out with the fan casing). The end of the duct is buried in the insulation up in the attic. ...
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1answer
1k views

Why won't my new exhaust fan wired between switch and light fixture work?

DIY electrical guy here. I have one 2/12 coming into the top of an existing wall switch (sgl. pole) that powers an existing light fixture. So I assume (right or wrong) that the current is coming into ...
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3answers
5k views

Can I replace my bath fan with one of similar size?

I have a very small bathroom with an electrically powered air vent (extractor fan). When I turned on the light, it seemed to break down, and has not been working since then. I want to try and fix the ...
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0answers
303 views

How to vent large outdoor undercover area

I have a large (95 sq meters) undercover area behind my house: A few things to note: The house is just to the left of the picture. The roof of this area slants from the house to the far wall (as you ...
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2answers
4k views

Is a 20A switch needed for a bathroom fan/heat/light combo unit?

I have a dedicated 20A circuit going to my bathroom that I plan to use to hook up a fan/heater/light/night light combo unit. I would like to use the compact combo 2 or 3 decora rocker switches. A ...
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0answers
1k views

Bathroom exhaust fan through clay tile roof

I've installed an exhaust fan in an upstairs bathroom and need to vent it through the clay tile roof. (pic attached) The standard 4" pipe jacks and flashings I'm finding at Home Depot don't seem to ...
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1answer
2k views

Why are my bathroom light and fan wired to the same switch? [closed]

In my apartment my bathroom light and fan comes on at the same time. Is that standard for an apartment?
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1answer
72 views

my new exhaust bathroom fan wiring issue

The fan unit itself has a black wire, a white wire, and 2 green/yellow wires. Where do I tie in the green/yellow wires?
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1answer
3k views

Bathroom in-wall exhaust fan with dimmer?

In searching this SE, I see many questions discussing traditional ceiling fans and dimmer switches. This question revolves around bathroom in-wall exhaust fans and dimmer switches. Is it safe to ...
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1answer
153 views

Adding exhaust fan to semi-rigid dryer duct

I recently moved into a new house purchased by my friend/roommate/landlord. I plan on setting up my electronics workshop in the basement laundry area this weekend. Although there is plenty of space, ...
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1answer
3k views

How-to wire a Fan/Light in Bathroom with power at Switch box and Fan/Light box

I am helping a friend finish a small remodel to a MIL Apartment. Current subject: Bathroom I am trying to wire a new Fan/light to the separate switches at the wall. I want the (1) wall vanity light ...
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0answers
787 views

Replacing Bath Fan/Light Switch wiring

I'm installing a new bath fan and the old fan had dual wall switches with wiring like so: (One switch turned on/off the light and the other switch turned on/off the fan) The new fan has a single ...
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2answers
3k views

Whole house fan possible with vaulted ceiling?

I live in an area where I think a whole-house fan would be a big benefit. But my upper floor has a vaulted ceiling. I don't know anything about the construction. There is a ceiling fan, but it ...
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2answers
765 views

Can I ground my new exhaust fan to the metal box where there is no grounded conductor?

Can I add a green ground screen to my exhaust fan's housing (metal) and connect the green ground wire to it? There is no ground wire in the old supply wiring.
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2answers
835 views

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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3answers
8k views

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
508 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
622 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
3k 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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3answers
311 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
5k 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
58 views

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
904 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
580 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
10k 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
107 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
392 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
13k views

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
10k 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
44 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 ...