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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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Wiring bathroom exhaust fan / light

I have a bathroom with 2 wall switches, 1 for vanity wall light and 1 for exhaust fan. I want to replace the exhaust fan with a combination light/exhaust fan. The switch that operates the old exhaust ...
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1answer
30 views

Wall exhaust fan

I'd like to install a wall exhaust fan, similar to this one. I want to wire it so I can plug it into an outlet as I dont want to tear through drywall. Which type of plug/wires would I need? The fan ...
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2answers
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Wiring for light switch and exhaust fan

Let me start by saying I don't really know what I am talking about, so my vocabulary may be incorrect. This is all based upon my best interpretation of the problem. I am replacing some old light ...
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3answers
61 views

How do I balance an attic fan?

I have recently replaced a motor for my attic fan because the original one burned out. I did measurements for the height of the fan blades in relation to the supports and ensured that when I re-...
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5answers
2k views

How can I connect a timer to my bathroom exhaust fan?

I have a bathroom fan, but it only runs when the light is on (i.e. no delay). The fan itself is really good, but it should really run on after (I think this might be part of the Building Regulations ...
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0answers
25 views

Diagnose poorly functioning whole house fan

I installed an AirScape3.5e whole house fan. I don't think the fan is operating at its max potential. It just doesn't seem to cool the house down very much when running even when the outdoor ...
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1answer
69 views

Clothes dryer causing humidity problems in garage - would extraction fan help?

We have a double garage with a high ceiling which is also where our laundry is. We have a problem with humidity in there due to the clothes dryer being in there which is used very regularly. This is ...
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1answer
79 views

Exhaust Fan Runs With No Power at All!

How can my furnace exhaust fan run with the power off, the thermostat off, and the breaker off?!
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1answer
65 views

What's wrong with my replacement fan motor?

I have one of those integrated bathroom 3-in-1 ceiling units (light, heat and exhaust fan). Recently the fan spontaneously stopped working. I took the unit down to inspect the fan motor and took it ...
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2answers
123 views

Can I attach a extract fan on a portable a/c unit exhaust hose?

I have a window a little far(+-5 meters) from the room i wish to add an portable a/c. Is it possible to use an extractor fan to help pull the exhausted air from the portable a/c?
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1answer
23 views

Replacing bathroom exhaust fan

Old fixture: combination fan and light New fixture: fan only New fixture wiring: 1 white, 1 black, 1 green Existing wiring: 1 white, 1 black, 1 bare copper, 1 red Wall switch: red & black ...
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0answers
61 views

Questionable electric work

My bathroom light is connected to the same switch that runs my exhaust fan. The switch doesn't go all the way up without an extra bit of a push and then sometimes when the switch is completely off ...
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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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1answer
329 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
242 views

filtered air intake for whole house fan

I'm installing a new whole-house-fan, and am expecting good results. We live at 8,000' and have ~40 degree (f) temperature swings between day and night with very little humidity. But we also have ...
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1answer
21 views

Replace Broan 670 with new fan/light from bathroom

I have what I think is a Broan 670 exhaust fan installed in my bathroom. I would like a fan/light combo instead. I am unable to easily access it from the attic so I am hoping to replace it from the ...
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1answer
553 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
43 views

Light and fan switches

I would like to have a double wall switch for the toilet where one switch (#1) turns on both the light and the fan while the second switch (#2) turns only the fan. Please note the light and the fan ...
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2answers
2k views

Is it OK to vent a first floor bathroom with a fan and a duct running through the basement?

I have a bathroom on the first floor of a two-floor house where the popcorn ceiling has dilated and cracked open twice within a year, and some mold is always coming back next to the ceiling, so I need ...
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4answers
392 views

Why is my Panasonic Whisper series bath fan starting up so slowly?

I recently had a Panasonic Whisper Series bath fan installed in my bathroom by a plumbing/HVAC company and wired up by a separate electrician. The fan starts up extremely slowly: it sounds like ...
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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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1answer
56 views

Bathroom fan/light wiring help

I have old switches at home for the fan and lights. In short, 2 switches to control fan and lights separately. Recently, I've been trying to add a timer switch which requires neutral and it doesn't ...
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3answers
904 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
36k views

Can I vent my bathroom exhaust fan into a plumbing drain vent?

I installed a bathroom fan in the ceiling. My bathroom is in the room right next to the laundry room. The washing machine has the standard drain pipe vent of a pvc pipe venting to the outside ...
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1answer
732 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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3answers
171 views

Can 14/3 wire, with all three conductors hot, be the only cable in a switch box?

I currently have a bathroom light and a single pole switch at the door. The power for the light first comes into the ceiling box directly above the light. The hot is tapped in right there by using the ...
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2answers
364 views

Exhaust Fan tripping GFCI

Our shower exhaust fan is tripping the GFCI when turned on. When I disconnect the FAN (there is a molex plug in the fan) the GFCI does not trip when the switch is turned on or off. Looking for ...
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1answer
40 views

Is this an appropriate replacement for our current bathroom extractor fan?

Our existing fan is old, inefficient and extremely loud. I believe it is an old P Series centrifugal extractor made by Greenwood Airvac, although I am unable to be certain as the model and serial ...
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1answer
63 views

New bathroom fan has a 2 prong plug. Old fan was straight wired. How do I convert?

My new exhaust fan has a 2 prong plug, my old fan was straight wired so I don't have a receiver. How do I convert to straight wire?
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1answer
14k 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
95 views

How to wire 3 separate switches to a single exhaust fan

I have installed multi port exhaust fan in the attic to serve 3 separate bathrooms. How can I wire the fan so that the fan can operate independently from a switch in any of the bathrooms?
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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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1answer
273 views

Ice In Radon Mitigation System

I have a fan powered radon mitigation system installed in my house. It was installed in 2016 and I have not had any issues with it until this winter. I live in northern Iowa where we have been ...
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1answer
32 views

Exhaust fan outlet broken

Can anyone tell me if I can buy an outlet for my bathroom exhaust fan? It cracked and I want to replace. Thanks in advance
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1answer
356 views

Installing a Bath Fan Without Attic Access?

I'm looking to install a bath fan (https://www.homedepot.com/p/Delta-Breez-GreenBuilder-Series-100-CFM-Wall-or-Ceiling-Bathroom-Exhaust-Fan-ENERGY-STAR-GBR100/204347760) in a bathroom on the second ...
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0answers
15 views

Two Exhaust Vent on the ame circuit

Can I install two bathroom exhaust vents (adjacent bathrooms) on the same circuit but with each having their own switch?
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1answer
131 views

Installing a Bath Fan Roof Vent Without Attic Access?

I'm interested in installing a bathroom extractor fan where there was a previously small regular fan, but there isn't an attic above the bathroom. The switch is already wired from the previous fan ...
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2answers
62 views

Is 4“ Ducting Used for a 4” Bath Fan?

I'm interested in installing a bath fan and am currently planning ou the project. The fan specs (https://www.homedepot.com/p/Delta-Breez-GreenBuilder-Series-100-CFM-Wall-or-Ceiling-Bathroom-Exhaust-...
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1answer
123 views

Bathroom fan and clothes dryer share an exhaust duct

My dryer which is located in our garage and our downstairs bathroom vents are connected. When the dryer is running warm air is moving to the outside, but also some of the air is coming back into the ...
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2answers
71 views

Where do you put the oil when oiling a fan?

I know some fan motors have ports to oil but many do not (bathroom exhaust fan, bathroom heater fan, regular house fan, etc). How do you oil the ones that do not have ports? Specifically, where do ...
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2answers
746 views

What Type of Ducting Should Be Used for a Bathroom Exhaust Fan?

I'm planning on installing a Bathroom exhaust fan (Just a note, the port is 4") and am curious as to what kind of duct should be used. I've heard that the duct should be insulated to prevent water ...
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1answer
272 views

Restrictions on 90 Degree Elbow for a Bathroom Exhaust Fan?

The manual for a certain (100CFM/4") bathroom exhaust fan has a restriction on using 90-degree elbows close to the unit. Why is this? Is it okay to use 90-degree elbows further down the exhaust path? ...
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2answers
258 views

Replacing Bath Fan Switch with Timer Switch

I want to install a timer switch (it has four wires, red (load), black (hot), white (common), green (ground) to replace one switch in a 2-gang switch box having five incoming cables (see first photo). ...
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1answer
474 views

Bathroom exhaust leaking when it rains

I have a water leak in my bathroom from around the exhaust housing that fits up into the ceiling. It only happens when it rains . How do I fix this problem?
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2answers
91 views

difficulty of replacing bathroom fan

I have a fan in one of the bathrooms of a 1930s house and there's a relatively low ceiling. The fan seems to work ok and it's in pretty decent shape(seems to be from 2013), but I think we need a bit ...
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6answers
8k views

Air sealing a whole house fan

I have a whole house fan installed in my house from the previous owners. I love the fan, as it lets me cool down the house quickly in the evening -- or after I fill the house with smoke from ...
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2answers
80 views

Could someone explain these wiring diagram symbols please?

This is for a bathroom ceiling fan. I recognise the pull cord switch. It's the two middle symbols I'm not sure about. The square one on the right. Is that just a switch? Something like this: https://...
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2answers
749 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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1answer
40 views

How do I wire in a bathroom light/fan to this box?

This is a very old house. I wanted to add a light/fan to this bathroom while the ceiling was down for repair. When I opened the switch box this is what I found (second picture). A GFI wired correctly,...
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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 ...