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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108 views

Clearance for bathroom vent fan

I am looking to add some storage space to my bathrooms by installing some wall-mounted, pre-built upper cabinets. The bathroom is arranged such that the only reasonable location for a cabinet would ...
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1answer
2k views

Bathroom exhaust fan wiring issue, power to light then switch?

I am installing a new exhaust fan into my bathroom. I plan to use a 2 function rocker switch to operate the fan and light independently. The power passes through the light first, and then to the ...
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805 views

Bathroom exhaust/light combo - light doesn't come on until fan on

In our guest bathroom, we have a fan/exhaust combo with 2 switches. Today my wife noticed that the light wouldn't turn on until she turned the fan on. Then she could turn the fan off and the light ...
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1answer
331 views

Installing bathroom exhaust fan ( light , fan , and heater with three seprate switches on wall

Need help on wiring light unit. Have three plug-ins inside unit. One for light , one for fan , and one for heater. Have three cables coming into unit. All three cables are 2 wire with ground wire. ...
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1answer
3k views

Exhaust fan venting through soffit where attic has no vent

I am installing a bathroom exhaust fan in a portion of the house which is a small addition to the original house. The attic above the addition is separated from the rest of the attic by the original ...
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3answers
479 views

How to deal with the trapped air in a loft attic?

I live in an apartment (not a house) with a loft attic. It has enough space and I use it as a study room. In summer, the air is extremely hot as I walk up the steps to the attic. Initially I was ...
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0answers
193 views

How to insulate whole house fan opening for the winter (from the inside)?

There is a 3'x3' opening in the ceiling of my second (top) floor. The opening leads into the unheated attic. I want to both seal and insulate this opening to keep out the cold in the winter. (I live ...
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2answers
765 views

Bathroom exhaust fan/light combo only fan works

I bought a new bathroom exhaust fan and light combo. It came with two sets of wires, one for the fan and one for the light. It also came with an extra ground for the motor (where should I put that)? ...
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3answers
137 views

Living near a highway in SoCal with no standard windows - how to install A/C?

I have an air purifier and keeping all windows/doors closed is going to be a must. But the humidity and temperature are issues now. I can get a dehumidifier but then I'm left with the temperature ...
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1answer
742 views

Bathroom exhaust vent into crawlspace

It is acceptable to vent a bathroom exhaust fan into a crawlspace? The crawlspace in question is uninsulated, has a dirt floor, and varies in height between 5' and 7'. The vent would enter roughly in ...
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1answer
29 views

Filtration system for smoke from oil lamp

I like to light a little oil lamp/ candle (lamp size about 2 inches in diameter) in my bedroom. Unfortunately the soot tends to make the wall and cupboards yellow. Is there a way to install a ...
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1answer
2k views

Possible source of dripping from bathroom exhaust fan?

During the winter, I experienced "Chinese water torture". The bathroom exhaust fan is located above the toilet. While seated on the throne, drops of water would hit my head every so many seconds. ...
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371 views

Increasing exhaust fan duct size

I have a bathroom exhaust fan that has a 3 inch duct outlet. However, I would like to use a 4 inch insulated flexible duct. Is there an adapter I can use to accomplish this or do I have to first use ...
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2answers
699 views

Should I increase the duct size of my bathroom fan outlet?

I have a new bathroom fan that I'm installing that is 70 CFM. It will only be in the water closet part of the bathroom as the bathroom already has a larger 150 CFM fan in it. The 70 CFM fan has a 3 ...
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1answer
74 views

What amps would I need for a variac fan controller?

I'm looking for a variac controller for a fan. I found one, but it's available in different models based on amps. How do I work out which controller would be the best one for my fan? My fan specs are:...
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3answers
205 views

How to cool a server closet with window?

I put 2 servers in my closet which run at about 90F. The closet has a window, but simply opening the window doesn't drop the temperature very much even when it is 60F outside. If I open the closet ...
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1answer
776 views

“Neutral wire required”!

I have a dual switch in my bathroom with two separate controls -- one for the fan and one for the light. It has the following four contacts: Ground (duh!) Two "common" ones, which seem short-...
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3answers
915 views

Kitchen Fan extraction not working as intended

After a long time suffering of sub-optimal fan extraction in my kitchen, I decided to go to the root of whatever was causing it. I have a Zanussi ZHC60136X. I clean the filter grids every now and ...
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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
1k views

How can I wire my bath fan to have automatic humidity control and manual switching?

I bought a bathroom vent fan with humidity sensor but no light. It unexpectedly arrived with 4 wires: ground, black, white, and blue. I only have 12-2 cable in the bathroom and no extra switch. This ...
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1answer
366 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
555 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
15k 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
387 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
202 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
90 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
803 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
619 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
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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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
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
384 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
754 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
88 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
4k 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
248 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
57 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
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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1answer
149 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
649 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
2k 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
637 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.