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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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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2answers
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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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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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1answer
31 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
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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
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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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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Replacing Exhaust Fan in Bathroom and connecting to semi rigid aluminum duct

I am replacing my exhaust fan in the bathroom and having a hard time connecting the new fan to the aluminum semi rigid duct, because is hard to compress, extend or curve. How can I make this easier ? ...
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Can I re-use the housing/wiring from a Nutone 669 bathroom exhaust fan (w light) when installing a Nutone 769?

I don't have easy access to the attic to remove the existing housing, but the dimensions are identical and the wiring is already done (two switches - one for fan, one for light). 769 fan specs are ...
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57 views

How do I calculate fan size for a single room exhaust system to reach a desired cfm when restricted to specific duct size/route?

I am wanting to exhaust a sealed room (except for air intake and exhaust). The room is 512 ft3, and due to positioning, orientation, and existing construction, I am restricted to using 6" flexible ...
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386 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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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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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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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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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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How can I tell if my bathroom ceiling vent is working properly?

Seems to take the vent forever to clear shower vapor from room. I purchased a vent that had a good rating. It is vented to the outside. How do I know if it is working properly and actually venting to ...
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3k views

How do I wire a bathroom exhaust fan/light to two switches?

I could use a diagram to wire the following: a bathroom exhaust fan with light on two separate switches. I also need a 3rd switch for a vanity light and a GFCI. My power comes from the attic (12/2 ...
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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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0answers
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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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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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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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249 views

Can I put in a vented bathroom fan in my condo

I just purchased a condo in Myrtle Beach, SC - it is the first time I have owned a condo versus a house. While exploring, I found that the bathroom fans don't vent outside, they just circulate the air ...
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How to convert bathroom ceiling exhaust fan to a ceiling fan

I'd like to remove a bathroom exhaust fan and in it's place install a small ceiling fan for better circulation. This bathroom does have a window that opens so I'm not concerned about code nor ...
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0answers
806 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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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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372 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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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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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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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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747 views

Fan speed control with timer?

I'm looking for a device that will allow me to control the fan speed as well as have it timeout. In theory this might work if I used the output from the timer to feed into the dimmer, but it doesn't ...
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0answers
65 views

How to build exhaust system?

I light candles frequently in room, and I wanted to prevent candle soot from sticking to the walls etc. How about I install an exhaust system in that room? What other options do I have? How powerful ...