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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27 views

Bathroom Exhaust Fan with Light - Wiring

I have a new bathroom exhaust fan and light unit replacing an older unit of the same. Two switches — one for light and one for fan. The wiring instructions show. I have 4 wires coming to the unit. 2 ...
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Can I vent my bathroom with Air Return Grilles?

My apartment’s small full bathroom is about 50 sq ft, and there was an old Non-Vented Air Recirculating Fan in the ceiling. It died but there was still moisture/mold/mildew issues when it worked. I ...
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How to ground a kitchen exhaust blower fan?

Recently our kitchen exhaust fan stopped working, only humming and not moving. In the kitchen there's a butterfly damper, the exhaust switch is on the vent hood, and the motor and exhaust fan are on ...
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50 views

Kitchen exhaust fan vent pipe

We had professionally installed kitchen exhaust vent, venting outside. We had 300cfm and we were having smell issue in the house even after venting outside. We replaced the fan with 900 cfm and ...
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1answer
57 views

Are there issues with venting a bathroom fan through the roof soffit?

When I purchased my house, during the home inspection it was indicated that the bathroom vent is simply discharging directly into the attic space. Because we were concerned about mold in the attic, we'...
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3answers
63 views

How to hang exhaust fan with limited amount of space?

Ive added a small bathroom in my basement with a drop ceiling. I have limited amount of space to work with. Is it ok to use chain to hang my exhaust fan?
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Rats in range hood

I’ve just discovered I have rats in my range hood above my stove top in my kitchen. I’ve turned the fan on and heard a lot of squealing and crunches. Can clearly see the rat aswell stuck in the fan. ...
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1answer
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Bathroon light and ceiling exhaust fan wiring?

I feel like this is something I should be able to do but after reading similar threads I'm still confused: My bathroom is setup with two 12/2 wires coming into the switch box. One I know for sure goes ...
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2answers
161 views

New bathroom fan has 2 green wires but i do not know where to connect them

A new bathroom fan I want to install has 2 green and 1 each white and black. The line in the attic consists of a white, a black and a ground. What do I do with the 2 green wires?
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Entertainment Area is cooling required with this setup? Where to position fans?

I am getting my entertainment area setup and I wanted to get opinions on where I should install intake/exhaust fans and if it would even be required. Within my "nitch" I am going to have an ...
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3answers
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Replacing Bathroom Vent Fan

Looking to replace a bathroom vent fan in a property that is being renovated. The exhaust fan was not working, upon further inspection it seems to be the motor that is causing the issue. I want to ...
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1answer
30 views

Fan wiring no switch, only using humidity sensor for control

Putting in an exhaust fan for a bathroom that did not have one previously. Purchased one that has a humidity sensor and was looking to use that for the sole means of control (dont trust the kids to ...
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1answer
48 views

Repair crumbling edges of deliberate (wanted) hole in plaster ceiling

In my bathroom, there is an extractor fan mounted in the plasterboard/drywall ceiling. It's there to remove moisture and stale air. Naturally, there is a hole through which the fan fits, and the fan ...
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Is there a way to upgrade an existing bathroom light exhaust fan to include heater without having to rewire the entire switch?

I need to upgrade an existing bathroom light exhaust fan to include heater, however there is only one wire/switch going to the current exhaust fan which runs both the light and the exhaust fan. Is ...
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1answer
136 views

How to rewire a microwave exhaust fan to work as a stand alone exhaust fan?

Have a used microwave oven exhaust fan which I plan to use as a stand alone fan. The wiring on the fan is the enclosed picture. The question is how do I wire this to work as a stand alone fan? Update:...
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265 views

New timer switch has a blue wire instead of red wire

I just replaced a mechanical timer switch (noisy) with a digital switch. The old switch had red, white, and black wires and the new switch has red, white, blue wires. I simply connected the new blue ...
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5answers
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Does a portable fan work for drying the bathroom?

If a bathroom has no windows and doesn't get completely dry after a shower (neither do the towels, and the ceiling starts to grow black spots of mold), can a regular fan dry everything after the ...
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157 views

Where can I find a replacement bathroom fan with this uncommon electrical plug? [closed]

I’m replacing my bathroom exhaust fan. I planned to do this myself and watched a few how-tos. It looked easy. You basically just plug the new one in. The thing is that our bathroom fan seems to have a ...
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2answers
400 views

Is a bathroom required by code to have a window or exhaust fan?

The Fort Lauderdale, Florida unit is on the top floor and there is a duct for the unit's central air in the bathroom, but it doesn't have a window or exhaust fan. Is this not to code? What are my ...
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1answer
49 views

How to access OTR microwave exhaust vent/ducting

I currently have an OTR microwave that is externally vented The exhaust vent for the microwave is concealed by cabinets above the microwave, and inside the cabinets the ducting itself is concealed by ...
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2answers
157 views

four way switch to three way for vent fan

Currently there is a ventilation switch on the wall, which has 14/2 leading to a relay which will turn on my furnace and newly installed HRV. It also turns on the bathroom fan in the nearby bathroom. ...
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0answers
91 views

Can I safely drill a four inch hole in a brick load bearing wall?

I need to drill a four inch hole in a brick load bearing external wall for a kitchen fan. Is there much risk of affecting the structural integrity of the building? It is a two storey building and the ...
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25 views

Ventilating a flat roof

My ensuite bathroom has a major humidity problem. I took the fan out (it's one of those combo heat lamp + light + fan units) expecting the fan to be broken, but found another problem - it's just ...
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1answer
55 views

What is the correct placement of a 2nd story through-wall bathroom vent

I have a 2nd story bathroom which is a little too humid unless the window is left cracked all the time, greatly decreasing the efficiency of our HVAC system. I would like to install a bathroom fan ...
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3answers
184 views

Is it safe to have 3-switch light-vent-heater on 20 amp circuit with another light switch and a GFCI outlet?

Downstairs bathroom has a dedicated 20 amp crcuit. First in line is a GFCI outlet which trips the downstream light switch (for over mirror light) and a three-switch (for ceiling vent/light/heater ...
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3answers
244 views

Why is the white wire hot in an bath exhaust fan switch circuit?

Tried to figure this out from previous posts but am still confused, and afraid. Our 30 year old exhaust fan had a light, fan and heater. We're replacing it with a fan/light combo, no heater. The ...
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17 views

HRV Supply/Blower making a terrible sound

Here is a video (with sound): https://streamable.com/w8tgqk (You have to go about 0:20 in to hear the sound). I got unlucky during recording and the sound was more intermittent, but normally it's loud ...
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1answer
151 views

Ventilating a cat box through the dryer exhaust duct

I have a small closet that doubles as a laundry room, with a stacked washer and dryer. It's also where I keep my cat's litter box. It occurred to me that I could probably reduce the odor of the litter ...
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25 views

bathroom switches into a pir/motion sensor

I have a two switch box in my bathroom that controls a ceiling fan and light. I bought a TDHOS5, Dual Technology Humidity/PIR Motion sensor with the goal of replacing both switches. I can’t seem to ...
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1answer
102 views

Any issues wiring bathroom exhaust fan to low-voltage heated mirror?

I'm in Maryland, US. I was hoping to wire from the switch: https://smile.amazon.com/gp/product/B01CXXZV96/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 to this: https://www.clearmirror.com/...
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Options to route bathroom exhaust fan

I am trying to install a bathroom exhaust fan but I am not seeing a real good way to get outside. The first picture below shows my ideal spot for the fan represented by the new work box. If I were to ...
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0answers
35 views

Bathroom fan wiring

I am trying to install a bathroom fan and am having some issues. The sketch below is how I curently have it wired. (blue in the sketch are the white wires) Previousy there was a single switch that ...
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1answer
57 views

Wiring for new bathroom fan

I am trying to add a fan in a bathroom and need some wiring assistance. I removed the switch thet controls the overhead light and found 2 black wires attached. From the research I have done it seems ...
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36 views

Bosch range hood fan low hum and not sucking air

Something is wrong with my Bosch range hood fan. It was working on low but when I switched it to high it started making a low humming sound like it was really struggling and not sucking up air at all. ...
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1answer
127 views

Two countdown timers connected to one inline fan — Does it work?

I'm planning on replacing two old bathroom fans with a single inline model installed in the attic (Panasonic WhisperLine). It will be connected with the two bathrooms through a Y-duct and exhaust ...
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1answer
131 views

Bathroom exhaust fan and light switch separation

new here and I tried the search but can’t seem to find an answer to what I’ve got. In my bathroom, I have 2 switches. When top switch is on, bottom off, the vanity light and the exhaust fan light ...
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71 views

Ductless 1/2 Bath Vent - yes or no?

From what I can understand, code says any bath fan needs to be vented to the outside. I live in Denver, CO and have been told that I can use just a charcoal ductless fan in the half bath we are ...
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1answer
744 views

Is it safe to drill a 6" hole into a beam or i-joist for range hood duct?

I'm installing a range hood over my island after a kitchen remodel and I ran into an issue. If I try to run the ducting alongside the joists in the ceiling I run into a beam which looks to be ...
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39 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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1answer
497 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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1answer
92 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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2answers
104 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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2answers
169 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
95 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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110 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
31 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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46 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
63 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
35 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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46 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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