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
45 views

Wiring bathroom exhaust

Having trouble wiring my fan to work with the switch. It either constantly runs or just doesn’t. Any help would be greatly appreciated.
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2answers
67 views

Whole house fan - unexpected voltage at high/low switch

I have this fan installed. Here's the wiring diagram... The fan has been running fine for about a month and all of a sudden it started acting like it has no power. I checked the voltage at the power ...
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1answer
41 views

Range Hood Fan Wiring

How do I connect the Red and Yellow wires from the fan to the Black and White wires from the power outlet? The range hood also has one red wire coming from the fan switch - how is this connected to ...
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0answers
37 views

Help with Range Hood Wiring [duplicate]

I need help with wiring my range hood fan. My challenge is I need precise instructions on how to connect the 3 wires. Please see new range hood wiring diagram attached. How do I connect wires 1, 2 &...
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2answers
181 views

Attic Fan in Garage of Ranch Home

My attached 2 car garage typically gets over 100 degrees in the summer. I have an insulated garage door. The garage has a sheetrock ceiling and attic space above that is connected to the rest of the ...
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2answers
34 views

How to separate bathroom light from fan

I am trying to separate the light and fan to two separate switches. I took the black wires apart and tried each one separate. One did nothing, and the other turned on both. I’m assuming this means I ...
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1answer
57 views

How to remove this ancient exhaust fan?

It seems to be held in by those metal strips that I can't budge.The wood that it's up against is thin- only about 1/4 inch. And the metal part starts/stops at the visible wood and extends beyond sight ...
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1answer
51 views

Will I have trouble running a bathroom fan 10 CFM (25%) stronger than needed?

My bathroom measures in at 289 cubic feet. Dividing that by 7.5 and rounding up gives me a target fan capacity of 40 CFM. However, there are many more fans available at 50 CFM. I read this post, Are ...
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1answer
42 views

Help wiring a bathroom exhaust fan/light combo on a single switch

I currently have a single pole light switch that powers a exhaust fan/light combo unit. I am replacing the old unit since the motor blew on it. The wiring coming from the ceiling is black, white, red, ...
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2answers
61 views

Can I (should I) do anything about these open PVC exhaust pipes in regards to rain or pests

I moved into my current home recently and noticed these exhaust pipes are open. Do I have to worry about rodents or insects getting in? Can I improvise a makeshift screen with some additional PVC pipe ...
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1answer
66 views

How to protect exposed bathroom fan wiring

I‘m replacing a builder’s bathroom vent fan and housing. I have two problems. The new housing’s knockout cover is missing. Manufacturer doesn’t have a replacement. The (rigid metallic) conduit leaves ...
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2answers
43 views

How to find a non-switched wire in attic

I'm trying to add a whole house fan in the attic. Currently there are many power cables in the attic and as far as I know, they all feed lights and bathroom fans - implying they are all switched. ...
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1answer
24 views

Bathroom exhaust fan wiring

Hi all I am needing help. Wires to fan box 1 white , 1 red, 1 black and 1 ground. The new fan has Pair - white & black Pair - white & red Pair - white & blue 1 ground [see pic)
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1answer
39 views

Bath exhaust fan issue

We closed on this new construction townhome in January 2014. 6 1/2 years later, cleaning the Panasonic exhaust fans in all 4 bathrooms, to my astonishment, basement bathroom fan has no ductwork. Fan ...
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1answer
11k 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
117 views

What is the name of this plug/socket combo from a rangehood?

I have a rangehood with some lights for illumination. But they're expensive lamps, mains voltage, not very bright and they run hot. So I'm looking to remove and replace with something LED based. ...
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1answer
65 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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1answer
29 views

Type of insulation for flexible aluminum duct?

I’m replacing an undersized bathroom exhaust fan with a larger one that has a higher CFM. When switching the fan out, I want to add insulation to the flexible aluminum duct that goes from the fan to ...
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2answers
32 views

Ventless vs nonventless

We are remodeling a bathroom. Currently it has an exhaust fan vented through the attic. We purchased a Broan roomside series surface shield. (No attic access required with ezduct connector, no attic ...
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0answers
38 views

How do I connect my new bathroom exhaust fan to the old duct that isn't lined up for the new fan?

The old fan died, and I'm trying to install a replacement. The old one was 80CFM, and, despite it working 24x7, the groundfloor bathroom was always a little damp. The new one is a fancy Panasonic, ...
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1answer
497 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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0answers
40 views

Venting a hot garage, how much cooler can it get with an exhaust fan?

I life in Miami and the garage gets very hot in the summer and I am trying to cool it down so I can workout in it. The basics are: I'm looking at this product: iLiving - 10" Wall Mounted Exhaust ...
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0answers
25 views

Exhaust fan in Toilet room off the master bath

I understand it is code for exhaust fan in the Toilet room (Small 4x5 room with door) this room is off the main master bathroom. Do I need another exhaust for the main bathroom for code? Can I put a ...
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4answers
5k 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
21 views

AC switch with two mutualy exclusive power lines

I have deconstructed my bathroom fan and found three wires coming from the wall: N -- neutral A -- has 230V only when light switch is on B -- has 230V only when light switch is off I wonder how ...
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1answer
123 views

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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2answers
44 views

New gas range setting off smoke/gas detectors

I converted our kitchen's range to gas. The gas line was installed professionally but I connected the new stove. As part of setup I heated the oven to 350 to test the burners. Soon after reaching ...
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0answers
47 views

Why is my dryer producing condensation and wet inside when it is not in use?

During the recent one year, I have noticed my dryer is producing condensation and wet inside when it is not in use. I live in a 5 units apartment building and I am on the top floor. After I cleaned ...
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2answers
4k 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
70 views

Exhaust fan and light on same switch

I want to add an exhaust fan to my bathroom. Do I run power from the light switch to power the fan or do I run power from the light box. Thanks as of now there is a single pole do i use a double pole ...
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0answers
42 views

CFM ratings of inline duct fans far exceed the ratings for their intended duct sizes. What are we to make of this when designing a system?

My garage is 25×29' with 10' ceilings, so 7250 cf. I'm hoping to be able to turn over the air every 3 minutes or so, so aiming at using 2 fans rated at a total of 2400cfm. The fans I'd like to use ...
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1answer
108 views

Bathroom fan duct connection for maintainability

There are many questions on here about installing duct work for bathroom fans, but I have a more specific question. I am planning to use rigid duct for a new bathroom fan where there was none ...
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2answers
32k views

How can I seal the gap around a bathroom exhaust fan?

I've got my exhaust fan installed in the ceiling of the bathroom, now I'm wonder how best to seal the gap around it. The fan housing is obviously sheet metal, and the ceiling has the plastic vapor ...
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1answer
32 views

Need help with wiring for bathroom fan

I am trying to replace my bathroom fan. The old fan had a light, but I am replacing it with a basic fan with no light (Hampton Bay #BPT13-14MG). The ceiling has two pipes that each have one white ...
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2answers
36 views

Old bathroom exhaust fan replacement

Hope everyone is safe and well. My house came with this old bathroom exhaust fan. The fan works but I feel it is not strong enough for the bathroom as my mirror and bathroom become foggy during a ...
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1answer
28 views

Humidity sensor switch wired to current setup

I have a DewStop FS-300-W1 humidity sensor that replaces a light switch that has a red, black, white and green wires. I want to replace the left most switch (that currently controls the fan) with the ...
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1answer
30 views

Bathfan Exhaust

I have a ERV (brand Van EE 40+) attached to my HVAC system. I am ducting a 3 pc basement washroom and would like to tie the bath fan into the ERV exhaust air flow as I have very limited options ...
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2answers
4k 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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0answers
15 views

Ceiling fan/light in bathroom shortcuts when humid

I have a ceiling fan/light combo in my bathroom ceiling. It's hooked up with those white connectors you see on this picture: When someone takes long showers, especially at night when the temperature ...
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1answer
38 views

How to handle air condenser with garage addition

I'm planning a garage addition onto my house and want to know what the best way to handle existing A/C condenser units that are there is. The current setup is as follows (with the C's being the ...
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1answer
83 views

How to wire garage exhaust fan to Humidity sensor/fan control and VENTILATION CONTROLLER

I'm installing this exhaust fan in my garage:(https://www.industrialfansdirect.com/products/ff700). I also want to install this garage ventilation controller: (https://www.aircycler.com/pages/...
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2answers
18k 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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5answers
9k views

Bathroom exhaust fan without duct

I just found out that our bathroom exhaust fan has no duct attached to it. Our current fan is Panasonic FV-08VQ2 (90 CFM, 4" duct diameter). The fan just blows the air to the inaccessible attic. There ...
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2answers
9k 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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1answer
76 views

Gravity grille not opening when bathroom fan is on

I have a question about airflow with a bathroom fan, in this case a Ventaxia VASF100T with a front cover, duct through the wall and a gravity grille on the outside. It seems quite inefficient at ...
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2answers
64 views

How do we wire a new bathroom exhaust fan to our bathroom?

In our attic we have a junction box that has the power wire connected to a hallway ceiling light. Can we tap into that to get power to install a bathroom exhaust fan? We would be putting in a double ...
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5answers
3k views

Will it cause problems to shower without the exhaust fan and only turn it on afterwards?

If the exhaust fan was not turned on until after the shower is complete (say, 30 min. after the water is first turned on), is that enough to cause mold/mildew/paint issues? The mirror is foggy during ...
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1answer
5k 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
1k views

Should I keep a bathroom door open or closed to keep it from expanding?

Should I keep the bathroom door open or shut after a shower to keep it from expanding? What if the fan is on as well?
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2answers
62 views

Do I need ductwork for a through-wall exhaust fan?

We have a small wine fridge beneath our counter that was having temperature problems because there was no ventilation to allow the heat to exhaust. The other side of the wall behind the fridge is a ...

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