Questions tagged [venting]

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OK to leave open combustion air pipe in crawlspace sucking air from crawlspace? I like in Alaska and we have had a lot of snow blocking outside vent

We recently had an unusual snowstorm that completely covered the open combustion air pipe that is vented at almost ground level to the outside. This caused the HVAC to shut down. We are worried ...
2 votes
1 answer
78 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 ...
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1 answer
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Plumbing - Moving Kitchen - Kitchen and Dishwasher Drain to Laundry Sink and Clothes Washer Existing Line - Need advice on venting and pipe size

Context: Located in California and doing an addition and moving the kitchen. The kitchen sink and dishwasher drain into an existing line in the garage that has a laundry sink and a clothes washer. ...
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3 votes
2 answers
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What to do with roof vent if needing to drywall over it?

Heavy DIYer but first time dealing with roof. This is my final trade to learn, so go easy on me. Denver, CO. I am vaulting the ceiling of what was dead space over the kitchen before. The dead space ...
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Venting a roof with no soffit or gable

My house has a vented cathedral ceiling via soffit vents at the bottom and box vents at the top. There was a storage room added on later which covered up the soffit in one corner of the house. Now, we ...
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Adapt old double walled clay / metal furnace vent pipe to modern B Vent

I have an old double wall clay/metal pipe that I need to adapt to modern 5” B Vent for furnace. The existing pipe runs to the exterior and was haphazardly connected to some B vent from the furnace; I'...
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1 vote
2 answers
128 views

New bathroom exhaust to soffit/eave? [duplicate]

I'm installing vent fans in both bathrooms on 2nd story of my two story house. Open attic access. Instead of venting to the roof or through the gable which requires risky ladder work, Wanted to vent ...
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2 votes
3 answers
124 views

Discovered my bathroom exhaust fan has no ventilation, what do I do?

Asking for help or advice on how I should run the new ducting for the existing bathroom exhaust fan. Whether I should run the ducting to the soffit, siding or roof? I would also ask for "Pros&...
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1 vote
1 answer
219 views

How do I connect these two pieces of dryer duct in my attic?

I am about to install a Dryer by mounting it on the wall in an inverted fashion, and then venting it through an existing dryer vent setup that has been designed with a duct joint that goes into the ...
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2 answers
64 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 ...
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32 views

Is a vented gas fire pit in a covered deck a bad idea?

We are building a home and desire to have a covered deck with a gas fire pit. Some websites say no problem, but when speaking with a dealer of gas fire pits, they were opposed to the idea because the ...
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Need way to Vent Heat out of Vaulted Ceiling in top floor Condo in Colorado

I live in a top floor condo with a vaulted ceiling. The high vertical wall of the vaulted ceiling backs onto an attic area accessed from outside the condo. There are NO vents and 2 poorly working ...
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Noisy kitchen vent fan

My kitchen vent is a 6" duct that curves to the side, goes to the outside wall, where a fan is mounted, pulling the air outside. Due to the curve (and the fan, I think), when I turn on the fan, ...
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Will this plumbing venting plan work?

Would this drain layout work for my basement bathroom in terms of sufficient venting and drainage? I have a dry vent available from above near the lavatory which I plan to use for venting the toilet ...
2 votes
1 answer
599 views

How do I check bathroom plumbing vent?

I have an addition where the toilet clogs every few weeks. You can hear it coming a few flushes before the back up with a LOT of gurgling in the pipes. I "fix it" by running the shower, and ...
1 vote
0 answers
63 views

What does section 904.4 of the international plumbing code mean?

I'm trying to figure out where I'm supposed to install my main drain vent stack. I assumed it would be just above the toilet, but I'm confused by section 904.4 of the international plumbing code, ...
0 votes
1 answer
79 views

What is the best way to vent the plumbing for a 1 sink/1 toilet bathroom in the basement?

I am currently finishing my basement, and we plan on putting in a small bathroom. When it comes to venting, I wasn't sure if I needed to run a pipe from the basement, up through the 1st floor wall, ...
3 votes
1 answer
483 views

Will Air Admittance Valves help me? If so, where to place them?

This is my first question so apologies if its not the highest quality. will do better over time. My primary question is: based on the current plumbing layout, what problems am I likely to experience, ...
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1 answer
210 views

Toilet intermittently won’t flush - strange seasonal venting issue maybe?

Backstory: last winter we had an issue where Toilet #2 of our 2 toilets (the one furthest from septic tank) would intermittently not flush. The tank would drain completely and refill properly, the ...
0 votes
2 answers
103 views

what kind of outdoor vent (for furnace) is this?

This is a vent for a home-heating furnace (blown-air, gas-heated). There was some kind of plastic meshing on the outside. It's broken. Now I have to go very high up and fix this somehow. A scary ...
1 vote
1 answer
165 views

My dryer isn't fully exhausting to the outside?

I recently bought a townhouse which has laundry in the finished basement. I noticed that our clothes took a bit more than an hour to dry in the dryer, so I wondered if there were any lint blockages. I ...
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167 views

Should old openings in a plywood roof deck be closed before installing steel?

My metal roofer removed all 14 old vents and installed two new "Maximum ventilators" in its place. The remaining 12 holes are still there and not sealed and i can see the underside of the ...
2 votes
2 answers
1k views

Is it safe to remove vent and cap off unused drain

I am in the process of renovating my kitchen and removed a wall. I discovered a closed off drain and a vent that goes through the ceiling. There does not appear to be anything else tied into the vent. ...
0 votes
1 answer
469 views

Combining (dry) vents for fewer roof penetrations

I am remodeling and in the process need to move part of the vent stack. A simplified sketch of my existing plumbing situation across multiple floors is shown (pencil). I am proposing to eliminate vent ...
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Venting a portable a/c into another room that is closed off with the window open

I have a portable air conditioner in my bedroom, and I use it only at night when I am sleeping, and only maybe 10 nights a year. I hate to block up the window with the unwieldy vent hose set-up ...
1 vote
0 answers
43 views

Smell from laundry drain, possibly no vent?

Just purchased a home that was renovated. Appears to have not been by a professional, nothing major but small things. Not sure what to do on this one. There is a smell coming from the in wall drain....
2 votes
2 answers
447 views

S Trap conversion - not enough room

I'm getting some gurgling from my kitchen sink which I think is due to this S trap. No ventilation. I want to convert to a P trap, and bring an AAV into the situation but with the current PVC layout ...
3 votes
3 answers
4k views

Can I share a dryer vent with a portable A/C unit?

I want to add a portable A/C unit in our sun room which also houses our washer/dryer. Rather than vent the A/C thru a window I'd like to know if I could utilize the dryer venting by using a Y ...
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Do I really need a 1200 CFM Hood for a 48" Range?

We just purchased a 48" ZLine range with 7 burners. The information about all this CFM is very confusing. Do I really need a 1200 CFM hood?
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Why does my toilet still get air bubbles?

Bubbles = bad ventilation, right? I've got a 1st story toilet which has air bubbles on every flush. It does not bubble after/before and water is not siphoned out/in when other plumbing is used. I'm ...
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1 vote
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210 views

Understanding sink drains with S trap / no trap

This is an >100yo apartment in the northeast USA. I'm on the third floor/top floor, and the kitchen sink drain appears to have an extended S-trap going into the floor. The piping seems to be done ...
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7 votes
3 answers
723 views

How can I remove a stud to fit a range hood vent?

Our kitchen contractor screwed up and forgot to move a stud and plumbing in an exterior wall to accommodate a vented range hood. Cabinets and countertops are now installed. The photo shows what is ...
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3 votes
2 answers
2k views

What prevents rain or snow from going down a concentric vent?

I am looking to possibly install concentric vents through the roof for two tankless water heaters I have. But I am concerned about rain coming back down the vent and damaging my water heaters. All ...
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1 answer
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Have you used a core drill on a foundation wall?

I'm looking to use a 4" core drill on a poured concrete foundation wall. The hole will be about 2" or so down from the top of the wall. The rental place has a handheld core drill with a ...
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987 views

Venting Dryer to Outside Through Foundation Wall OR Vent?

I'm relocating and replacing the ducting to vent my electric dryer that is located in the middle of my home. I'm using 4" galvanized duct, I've installed a Dryer Box on the back (2x6) wall of my ...
4 votes
1 answer
382 views

Multiple concentric vent kits

I have two concentric vent kits I need to poke through the roof. One is for my furnace and the other for my tankless water heater. I want to place them near each other for aesthetic reasons, but I ...
0 votes
2 answers
309 views

Is a condensing tankless heater that expels excess water outside also a dehumidifier?

I understand that a condensing tankless water heater will recycle that extra heat and only vent the heat that it cannot use; this is why they have a greater efficiency. But the water that condenses ...
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Rearguard vent issue on Kenmore gas range

Vent in rearguard of gas range is outputting too much heat on top of stove; can we adjust this? it was changed when range was moved recently.
-1 votes
2 answers
277 views

Venting a 96% furnace

I would like to use the existing exhaust ducting from a previous furnace to run the two pvc pipes for 96% furnace up through. I would cut the existing ducting in the attic to run the pvc out the roof. ...
1 vote
2 answers
226 views

Lack of soffit vents with the use of ridge vents on a 1941 home

[Home is in Georgia] I made the mistake of installing ridge vents on my home last year without any soffit vents. I have since learned that doing so will actually cause the air to be drawn from all ...
2 votes
3 answers
2k views

Need to move the dryer vent up by 3ft

I just bought a stacking washer/dryer machine and I need to relocate my floor dryer vent by 3ft above the floor so that I can push my machine all the way against the wall. This will give me about ...
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1 vote
2 answers
2k views

Dryer Venting for 1984 Condo

We are in the process of buying a circa 1984 condo. The dryer is not presently vented to the outside, and I do not know if it ever was. It currently vents inside to a water-filled lint catch basin. I ...
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3 votes
1 answer
485 views

Does my new bathroom plumbing need a cleanout?

I am working on new plumbing for an addition we just built. Does anyone see any issues? Do I need a clean-out at the end of the run? I plan on using a 3" elbow in lieu of a combo to keep ...
31 votes
6 answers
9k views

How do I fix this 30 ft (9 m) dryer vent abomination?

The previous owner left a bit of a headache with the dryer venting setup. Context: This is a gas dryer The living room is behind the right hand side wall, so that's a no-go as far as drilling The ...
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Will this work for a wet vent?

I am not sure if I properly understand the wet vent concept so here is the question. The current bathroom apparently has no dry venting. I am moving the sink from the point marked on the wall just ...
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0 votes
1 answer
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Finishing attic with static vent

I have a 1920s building with a gable roof that has a 10' peak. I'm going to finish the space and had an engineer detail the specs for structural safety, but I'm stuck on the appropriate way to provide ...
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253 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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1 vote
1 answer
420 views

How can I insulate my porch floor?

I have a wooden screened-in porch on a cabin that I am remodeling, with approximately 30 inches from the ground to the bottom of the porch tongue-and-groove boards. I am considering insulating the ...
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3 answers
2k views

Can insulation touch the roof sheathing in a sloped garage roof without soffit vents?

I am beginning to install fiberglass insulation in my garage and want know if I have done the ceiling wrong. The issue is that the insulation touches the roof sheathing in the sloped area below that I ...
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can a bathroom or kitchen exhaust airt through a vent placed in the outter edge of the soffit and pointing down and out

Can a bathroom or kitchen range vent out through a vent-unit placed on the outter-edge of a soffit if it is pointing down and away from the house?