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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3answers
6k views

Bathroom fan runs despite switch is off

My fan in the bathroom is constantly running no matter what position I put the switch to. The switch looks like this: And there is some other controller that I don't understand what it does (never ...
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1answer
392 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
55 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
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
206 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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2answers
21k views

How do I remove this old bathroom exhaust fan?

My ancient 1960s bathroom fan (a NuTone 8832) stopped working. I removed the cover and fan, but the "metal box" assembly is still in the ceiling. I'm not sure how to get it out. Here's the unit, with ...
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3answers
635 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
815 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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2answers
640 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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2answers
2k 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
64 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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0answers
397 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
133 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
762 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
150 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
89 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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4answers
448 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
42k views

How can I stop exhaust fan vent condensation problems?

So, our bathroom fan leaks when it is cold. In the attic, the PVC pipe connected to the exhaust is uninsulated, and frosted -- shock! So, my question is, what is the best way to fix this? Do I cut ...
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0answers
250 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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3answers
50k views

How can I rewire my bathroom fan, light, and receptacle?

My bathroom has one switch that powers the fan and light. In that electrical box, there is also a hard wired electrical outlet that sits in the bathroom. Since I don't have room for a 2 gang box in ...
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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
58 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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0answers
1k 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 ...
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1answer
147 views

Should there be an air outlet in an attic with a whole house fan?

There has been a whole house fan between the second floor and attic of my house for some time. We usually have it on with the downstairs windows open. I just had a thought: Should there be an open ...
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1answer
2k 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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6answers
90k 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 ...
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1answer
634 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
2k 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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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
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
179 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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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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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
358 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
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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1answer
554 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
672 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
6k 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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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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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
204 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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3answers
18k views

Will an exhaust fan made for ceilings work in a wall instead?

Does anyone know whether a bathroom exhaust fan designed to be installed in a ceiling would have any problems if installed in a wall instead? From a mechanical, ball bearings, noise perspective. Not a ...
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0answers
56 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
10k views

Should I vent my kitchen range vertically or horizontally?

In a planned kitchen remodel, one upgrade is to install an outside vented range hood. My choices are to vent vertically up through the roof or up and then horizontally (8') out the kitchen wall. The ...
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1answer
439 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 ...