Questions tagged [exhaust-vent]

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What size exhaust vent for 4 clothes dyers going 60’ with 1 elbow? [closed]

What size exhaust vent do I need for 4 clothes dryers to go 60’ with 1 elbow?
Laurence Wolfe's user avatar
1 vote
1 answer
53 views

How do I vent 3 bathroom exhausts out the roof

I have 3 bathroom vents that all just vent into the attic. There is flexible pipe going toward the edge of the attic, as if it were going out a soffit vent, but there are no soffits here. So they are ...
chen's user avatar
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Installing CT-4 vent for dryer - found 2 strange small holes - what are they and should they be blocked/covered?

I recently had a CT-4 vent installed to exhaust my dryer through my attic(it was the only way). I turned on the dryer to test the connection and I felt some air blowing out. I found the culprit was 2 ...
Christopher C's user avatar
0 votes
1 answer
78 views

What is this metal object inside the hot water tank vent?

While trying to diagnose an issue with my hot water tank, I disassembled it and took a photo from the inside where the burner is normally located, pointing upwards at the exhaust vent. It seems that ...
user453441's user avatar
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0 answers
147 views

How to effectively waterproof an exterior vent cap?

This is a follow-up to my other question. My house has a wood frame and vinyl siding. Installer came out to do a range hood install and for the outdoor vent cap he just sealed it with silicone to the ...
Should have done it myself's user avatar
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1 answer
51 views

Is it ok that my wall air vent does not seal to duct?

I went to my attic today and saw that all of the bathroom exhaust fan duct pipes are put loosely to the hole on the inside of the vent. Does this look right? I’m afraid this would blow air to the ...
VuDuong's user avatar
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1 answer
31 views

How to solve mismatch vent location for downdraft cooktop?

I am replacing a downdraft cooktop with another. A snag will be matching the new cooktop vent with the existing vent in the wall. The current vent is on an interior wall and I expect 1-2 inches (or ...
Maesumi's user avatar
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41 views

Bathroom Exhaust - Idea

I am doing a major remodel of my primary bathroom. Instead of the traditional exhaust fans I am thinking of doing something like: Run 3x14" duct in the wall stud cavity from the bathroom ...
JoeLeBaron's user avatar
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1 answer
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Range hood exhausts to wood

Bought a house and now replacing the old range hood. The horizontal exhaust goes back then up but I noticed that not only is the initial part of the exhaust pipe not galvanized metal, it is wood and ...
Eric Chantland's user avatar
0 votes
1 answer
84 views

Multiple vents inside and outside laundry room

I have recently moved in a house built in 2021. Its been a couple of months but I noticed today that there is an exhaust vent that is continuously running in the laundry room and there is no switch ...
Sam's user avatar
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1 answer
50 views

Is it worth completely changing “acceptable” bath vent ducting to avoid reducing from 4” fan to 3” ducting? [closed]

I’m upgrading two adjacent small bathrooms with new exhaust fans. The existing ducts are 3” plastic/flexible. The builder has both 3” ducts terminating, side by side, out of a 5or6” roof vent. The new ...
JAndrew's user avatar
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1 answer
229 views

How to seal a heater flue joint on the roof? [closed]

I noticed a crack in the joint between my heater vent and the roof. The crack is wide enough (see pic) such that the wood attic flooring beneath the cavity has warped from the rain. I think who ever ...
Stoic's user avatar
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1 answer
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The gills broke off of my kitchen fan, is it still safe to operate until I can replace it?

I live in a dinky apartment and one night, while being completely turned off, The plastic grille over my kitchen fan just fell and shattered on the ground. It seems like the bolt holding it in place ...
Elizabeth's user avatar
1 vote
1 answer
227 views

Exterior Water Heater venting

Is there a good code-compliant way to vent the following exterior water heater (see attached drawing). I thought this concept would work, but I am stuck trying to figure out a good way to vent. The ...
farinspace's user avatar
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Bathroom Fan Exhaust Vent Replacement

I am having a bit of a tough time finding an Exhaust Vent that will replace the one that we currently have which has some broken louvered pieces. The dimensions of the plate are 5.5" x 5.5". ...
MidwestMumboJumbo's user avatar
5 votes
2 answers
2k views

My new AC is under performing and guzzling too much juice, can anyone help?

My company mainly focuses on small refrigeration units and walk-ins. Although we do offer service and/or Replacements on air conditioning systems, it’s only 1/3rd of the whole show so, I’d be a liar ...
www.TEGdelivers.com's user avatar
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1 answer
27 views

Where to cut the opening for bath vent in crawlspace wall?

My first-floor half bath vents into the crawlspace, which violates the code, and I would like to correct it. A feasible way is to extend the hose from the current vent in the crawlspace to the nearest ...
bobby_yan's user avatar
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1 answer
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How to plan a vented range hood project?

I really want to install a vented range hood in my kitchen. It currently is one of those units that vents inside, and is just not powerful enough to get all the smoke, so it often triggers the fire ...
Inde_bean's user avatar
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1 answer
131 views

Open Vent under roof overhang

I am trying to help with my parents home maintenance since my dad’s stroke. They have this open vent under their roof overhang. I assume it is for a bathroom exhaust, but I don’t know what to replace ...
Dallas Janssen's user avatar
4 votes
2 answers
459 views

Why is my attic hotter after venting was updated?

I had my roof replaced last year and I am now seeing consistent temperatures in the attic that exceed 40 degrees over the outside temperature. For example, it was 62°F the other day and I had 108.5°F ...
Marc's user avatar
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2 votes
1 answer
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Does transitioning a bathroom fan duct diameter work even if the fan's outlet is the smaller dimension?

According to numerous charts online, I would need an 80 CFM bathroom fan to exhaust via a 6" round rigid duct in order for my planned long length run to work properly. If the exhaust outlet of a ...
Evil Elf's user avatar
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1 vote
3 answers
383 views

Questions on installing a bathroom exhaust fan [closed]

I am in the process of installing a new bathroom exhaust fan (Panasonic FV-0511VKL2). I had a few questions (my apologies if they are trivial or obvious but its my first time doing something by myself)...
bethink's user avatar
  • 13
2 votes
1 answer
198 views

In practice, is it problematic to vent a gas-fired boiler under a bay window?

I am having a 199 kBTU direct vented gas-fired combination boiler installed. Because of how the house is arranged, it's difficult to find a good place to vent the exhaust. The easiest spot is ...
aquaticapetheory's user avatar
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0 answers
66 views

Telescopic downdraft installation

I'm trying to install the telescopic downdraft for my island. (installation guide - model KitchenAid KXD4630YSSSKU (30" downdraft)) Because it's an island I wanted the blower to be in the rear of ...
Thomas's user avatar
  • 305
0 votes
1 answer
723 views

How should I terminate a range hood exhaust duct through a wall?

I discovered that my home's overhead stove vent doesn't actually vent to anywhere. So I've pulled out the old fan, purchased a new, more powerful fan with 1000 CFM, and then added 8" pipes ...
Village's user avatar
  • 1,055
3 votes
3 answers
2k views

Is a water heater exhaust pipe adhered or sealed in any way that would prevent me from temporarily removing it?

I want to add a shallow shelf to my storage room for storing mason jars -- unfortunately I didn't consider "Will I be able to get this past a (semi-)horizontal ran of the water heater exhaust ...
Sidney's user avatar
  • 1,645
1 vote
2 answers
298 views

Can I re-use an existing (and non used) water heater vent for a dryer?

I have a gas water heater and I'm thinking of moving to an electric water heater. The exhaust pipe would then be free and I was thinking of reusing it for a dryer. Would that work? The pipe would be ...
Thomas's user avatar
  • 305
2 votes
1 answer
1k views

Can I use PVC pipe to extend a bathroom exhaust duct outside the wall?

I have a new bathroom in my basement which is completely below grade. The duct for the bath vent was routed out through the joist space to the exterior wall and a vent wall cap added. The bottom of ...
PLynn's user avatar
  • 21
1 vote
5 answers
3k views

Electrician says existing switches won't work to Install Broan CST80SLW vent fan - correct or not?

I hired an electrician to install my Broan CST80SLW vent fan with light/fan/humidity detector. When he got the old unit out (fan/light wired to two separate switches) he said the new unit could not be ...
Not-so-handy's user avatar
0 votes
3 answers
298 views

Can I install a dryer vent low in the outside wall without compromising structural integrity?

I need to vent my dryer as previous owner had it venting inside the garage which caused several lint and humidity problems. Is it ok to drill the 4" hole on the very bottom part of the exterior ...
piotr's user avatar
  • 111
2 votes
1 answer
1k views

Can my Furnace and Water Heater share an exhaust?

Prelude: First properly cold day of the season and I was expecting my furnace to kick in, but it didn't. I went down into the basement to take a look at it and found it giving me an 2-blink error code ...
brhans's user avatar
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4 votes
3 answers
2k views

What kind of putty should be used for sealing rim joist exhaust vent holes?

I recently had a tankless water heater installed in my basement. The 4" exhaust vents through the rim joist. I'd like to seal the gap around the PVC, but I'm uncertain what type of putty to use. ...
Parker's user avatar
  • 290
1 vote
1 answer
1k views

Sharp 90 degree turn downward dryer vent lint brush head stuck

I live in an apartment where the "maintenance" is next to nothing. The new dryer we bought to take advantage of the hookups in the apartment was giving us the blockage error signal and not ...
Jutin's user avatar
  • 11
0 votes
2 answers
70 views

Help Identifying Vent Purpose

I'm trying to figure out what a vent on my roof is for. I have two vents close together. #2 in the photo is for the venting of the hot water heater. #1 is the one I'm not sure about. It has an ...
Erich Peterson's user avatar
2 votes
2 answers
3k views

Is the outside vent opening the same on most over the range microwave ovens?

Our 2010 over the range microwave oven is about it die. It wents outside through an opening in the wall behind the microwave. There's a port opening when the fan starts and it blows out through there. ...
Christian's user avatar
  • 769
1 vote
4 answers
2k views

How to re-route range hood ducting to my vent?

My current range vent does a wonky turn around and prevents the cabinet door from closing fully. I'm trying to figure out an alternate way to make the connection, but don't really have any good ideas. ...
Andrew's user avatar
  • 131
0 votes
1 answer
971 views

Sealing air gaps around edges of attic gable fan

I just installed a new gable fan to exhaust hot air from my attic. Due to unevenness in my studs and gravity pulling one side of the fan lower than the other, there are small gaps (ranging between 1/8&...
Justin Grant's user avatar
  • 1,587
9 votes
2 answers
3k views

Using old vent pipe as TV antenna

I recently replaced a house trap, and as a result, I have a leftover vent pipe that runs from my basement up through my roof. Would it be possible for me to somehow connect a coax cable to the pipe so ...
Andrew's user avatar
  • 126
1 vote
0 answers
202 views

Will this roof vent installation cause me problems?

I just have my house re-roofed on last November. Recently I look around in the attic and found the new vents and ventilation fan weren't prefect fit the existing holes. Will this situation be a big ...
YRJ's user avatar
  • 221
0 votes
0 answers
459 views

Outdoor direct vent tankless water heater (low nox) on exterior wall under overhang?

I have an exterior tankless heater that is one of the high-efficiency/low nox type, it has a direct vent (pretty small, actually) just sitting on the top grill. This is mounted outdoors, but is it ...
daveola's user avatar
  • 157
1 vote
1 answer
3k views

Is there a minimum distance between two exhaust vents going out an exterior wall? (NJ state)

Is there a minimum distance between two exhaust vents going out an exterior wall? I'm in the state of New Jersey and I was unable to find anything related to minimum distance between two exhaust vents ...
user2285215's user avatar
2 votes
1 answer
66 views

Best position for kitchen exhaust duct flow sensor

*TL;DR: a flow sensor on a kitchen exhaust duct fails to work reliably in its current location. Will moving it down two floors closer to the upstream exhaust hoods help or be a waste of effort? We ...
jweob's user avatar
  • 177
0 votes
3 answers
3k views

Are exhaust fans inter-connected in a 3 stories condo?

I am a smoker who lives on the first floor of a 100 years old 3 stories condo. During the winter, I smoke in my bathroom with the exhaust fan (on the ceiling) turned on to draw the smoke out. Each of ...
r13's user avatar
  • 3,382
1 vote
1 answer
596 views

how to eliminate fabric softener or anti-static chemical odors from laundry room

I recently purchased a 1960s home built on a crawlspace and have found that the laundry room and adjacent hallway has a strong odor of fabric softener and/or ant-static dryer sheets. When I walked ...
Richard Chambers's user avatar
0 votes
2 answers
2k views

Is water in a bathroom vent pipe avoidable?

My bathroom's fan vents through the ceiling, with a unit like this one: https://www.homedepot.com/p/Broan-NuTone-3-in-to-4-in-Roof-Vent-Kit-for-Round-Duct-Steel-in-Black-RVK1A/100344509 We had some ...
Indisputable Facts's user avatar
0 votes
2 answers
463 views

Vent 80% gas water heater through rim joist?

Can an 80% efficiency, draft hood, 40k BTU, water heater be vented through a 2x10 wood rim joist with painted cedar siding? Assume proper pipe sloping. The termination would be roughly 2 feet above ...
MonkeyZeus's user avatar
  • 16.6k
13 votes
2 answers
5k views

Is it safe to use Category 1 80,000BTU furnace with 2 inch PVC exhaust?

A contractor just finished installation of new HVAC system with a category 1 furnace (model: GMES800805CNAA). He originally used a reducer to connect 4 inch exhaust to a 2 inch PVC pipe. He claimed ...
Dimi's user avatar
  • 255
6 votes
3 answers
2k views

Do you to block a unwanted 4 inch hole or reuse it for something else?

Have 4 inch hole was made by builder for no reason and went unnoticed for long time as the hole was in the side wall of the House. the hole is through a basement wall. How can I permanently block the ...
PowerTech's user avatar
  • 630
1 vote
0 answers
321 views

Insulation around the pipe outside of a kitchen exhaust

Context I have a kitchen exhaust which works well enough, this question is about insulation. Last winter was quite a cold one for where I live, and I felt a nice fall of cold air coming from there. I ...
Guillaume's user avatar
  • 111
2 votes
2 answers
4k views

How can I install a hood exaust vent with a joist in the way?

I was preparing to install a hood vent this weekend and found myself with a bit of an issue... Here's what it looks like: The larger hole in the middle is the center point over my cooktop and the red ...
Chad's user avatar
  • 255