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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9
votes
2answers
23k views

What are the pros and cons of soffit vents vs. roof vents?

During my latest foray into the attic, I discovered that my bathroom exhaust fans vent directly into the attic. I'm worried about moisture buildup and I'm considering routing the exhaust to an ...
25
votes
4answers
259k views

Does a bathroom exhaust fan have to vent to the outside?

Is it normal and/or code compliant to have a bathroom exhaust fan venting to the attic? I've seen this a couple times now, and the first time I saw this I thought it was very odd. But I mentioned ...
1
vote
5answers
19k views

How can I wire an exhaust fan to turn on from multiple locations?

I just bought a Panasonic FV-20NLF1 inline bath exhaust fan that I planned to used to exhaust 2 different bathrooms. I want each bathroom light switch to control the fan, so when the lighting turns ...
9
votes
3answers
37k views

Why is water leaking near my bathroom's exhaust fan?

This weekend when the snow started melting on my roof, I noticed a small water spot developing around all three bathroom exhaust fans in my house. I'm guessing the water leaked in around the exhaust ...
7
votes
1answer
22k views

Is it better to vent a bathroom fan out the soffit, the side of the house, or the roof?

Working on a friend's house, we're installing a bathroom fan. He had planned to vent the fan out the closest soffit, which is only a few feet away. I'm trying to persuade him to vent it out the roof ...
6
votes
3answers
57k views

How can I rewire my bathroom fan, light, and receptacle?

My bathroom has one switch that powers the fan and light. In that electrical box, there is also a hard wired electrical outlet that sits in the bathroom. Since I don't have room for a 2 gang box in ...
5
votes
1answer
2k views

Is there aluminum wiring in my vent fan?

I just purchased and installed a new Panasonic FV-10NLF1 inline exhaust fan. My house has copper wiring, but the wires on the fan appear to be aluminum (they are silver in color). I didn't think ...
0
votes
2answers
933 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 ...
-1
votes
1answer
964 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 ...
5
votes
7answers
11k 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 ...
4
votes
3answers
6k views

Can I vent a bathroom fan through the eaves?

I want to fit a fan in our bathroom. The easiest way to do this seems to be to drill down from the loft and put it in directly above the shower. I'm then considering running the vent (flex pipe) ...
11
votes
3answers
50k 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 ...
8
votes
5answers
82k views

Is it possible to vent two exhaust fans through a single wall penetration?

I have two bathroom exhaust fans that need to be vented out of the house, but I'd like to do it using a single wall penetration. Is there a code compliant, safe way to do this? Both bathrooms are on ...
5
votes
3answers
9k views

Is GFCI protection required for a dedicated exhaust fan circuit?

I'm considering installing an exhaust fan in my bathroom which includes light and heat, and requires a dedicated 20 amp circuit. Would this circuit need GFCI protection? The instructions for the unit ...
3
votes
1answer
2k views

Can I vent a bathroom fan through an attic window?

Would venting a bathroom exhaust fan into the attic and through the attic window cause any problems? I was thinking this would prevent cutting a hole in the roof or the soffit. My thought was to ...
3
votes
2answers
28k views

How can I quiet a bathroom exhaust fan that became loud only after the duct was added?

I had a fan added in my bathroom. Surprisingly there wasn't one at all. When the fan was first installed they had it venting into the ceiling. It was a .5 sone fan and you could hardly tell that it ...
2
votes
1answer
67 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 ...
2
votes
2answers
120 views

How can I increase the effectiveness of my bathroom vent fan?

The vent fan in my bathroom isn't very effective. After taking a shower, the bathroom takes several hours to dry out. The fan itself works fine: it generates almost enough static suction to hold a ...
2
votes
1answer
8k views

Why does my bathroom exhaust fan drip during the summer?

I've seen a lot of questions (including one on this site) about condensation on bathroom vents. However, they all seem to take place in winter, with consensus being that as the warm air from the ...
2
votes
2answers
26k 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 ...
2
votes
2answers
2k 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 ...
1
vote
1answer
133 views

How to re-purpose an exhaust fan using a 10x3.25 duct?

I'm currently remodeling my kitchen. Instead of a cooktop hood, I plan to re-use the existing ceiling exhaust fan. It looks to be about a 8" diameter fan that is inside a 10x3.25 duct that exhausts ...
1
vote
2answers
389 views

Bathroom Vent - exhausts into attic insulation - what to do today?

So my wife called my attention the fact that the kids bathroom has some grunge on the ceiling and tends to have lots of water drops when in use. First issue - at some point the vent motor was ...
1
vote
1answer
106 views

Moving bathroom fan on GFCI outlet

I am replacing my bathroom ventilation fan and moving it right above the shower area. According to code Fan needs to be on GFCI now. Please take a look at picture near vanity wall. On Left there are ...
1
vote
1answer
888 views

Should I use inline bathroom fans?

I'm building a new full bathroom in my basement and I also have an existing full bathroom without an exhaust fan. The sizes are 207 ft3 and 470 ft3 respectively. I was initially thinking of buying ...
1
vote
2answers
113 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://...
0
votes
1answer
6k 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 ...
0
votes
0answers
3k views

Bathroom exhust fan ducting - size, length & CFM

Still trying to solve my problem of bathroom vent fans that aren't vented anywhere... Was considering running out the gable, but that's 25' away, plus another 10-15' of duct and a couple of elbows to ...
0
votes
1answer
1k views

Garage gable fan proper installation

I want to add a gable fan in my garage to help cool it and help to let out the humidity in the winter. My garage doesn't have a high peak, so there is about 24" of height at the peak on the gable and ...