Questions tagged [venting]

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Flatroof DYI vent in a maximum

My flat roof has just been redone by professionals. Before, I had a lot of mold in my attic (more of a crawl space), so we added a second maximum (now I have 2 of https://ventilation-maximum.com/en/...
william audet's user avatar
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Do I need soffit vents if I have an attic fan?

We are in the process of replacing our roof. Our roofs aren’t long enough for Soffit vents and we have loose insulation in the attic. Our roofer is installing a ridge vent at the top but no intake ...
John's user avatar
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sewer smell on cabin toilet

Hello I have an off grid cabin with one bathroom and the toilet room smells of sewer pretty bad at times, esp with rain and colder weather. I looked under the crawl space for venting and there is a ...
Matt Brown's user avatar
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Bathroom plumbing -Is it right?

My 1940 bathroom plumbing was just replaced and I am questioning whether the set-up is proper. Here is a picture. Long 2” pipe at bottom is for the bathtub/shower, fixture at top left is the toilet ...
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Looking for advice for external vent of OTR microwave

Our over-the-range microwave is currently configured for recirculating ventilation, which is less than ideal for many reasons (one of which being that it's over a gas range..). We discovered that ...
Dan's user avatar
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Guidance on proper ventilation for tools in a small indoor workshop

I am currently looking to set up an extra bedroom for an indoor workshop with the following: 3D printer, FDM and resin Laser engraver/cutter Airbrush booth CNC router I have an enclosure for the 3D ...
agarza's user avatar
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1 answer
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Can I use this old sink vent for new basement bathroom?

I am building a 3 piece bathroom + laundry in this old basement laundry room. The cast iron sink pictured drains to the floor and that vertical 1 1/4" copper pipe is a wet vent, I believe, as it ...
Carey Boo's user avatar
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Dripping dryer vent clean/dry help

The issue is every summer when we are running AC when it is 85 degrees outside, the dryer vent pipe starts to drip in 1-3 spots. I have an 18.5 ft dryer vent that goes from my first floor down a foot ...
Eric's user avatar
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2 answers
159 views

How to frame gable ends above top plate?

10'x16' insulated off grid "cabin" build. I want to use gable vents for my ventilation because it seems way simpler than a ride beam and soffit vents. I have a post centered on each 10" ...
Foopysfarm 's user avatar
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2 answers
96 views

Venting dryer into bathroom

My laundry has no roofspace access but shares an internal wall with the bathroom. The bathroom has a separate extractor fan on a different wall. Is it a reasonable idea to vent the dryer into the ...
nullPainter's user avatar
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New Basement Bathroom Drain Issue

First off, I live in Virginia, I know plumbing code varies state by state. I am roughing in a bathroom in my basement. I was planning to use a shower drain as my sink drain that is already in my ...
user168635's user avatar
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Hot water heater vent goes through bedroom making it hot

Our home was built in the 1950’s. The hot water heater is located in the basement and is directly beneath a bedroom. The hot water heater vent runs through that bedroom closet making that bedroom hot ...
Heidi's user avatar
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Newly purchased range hood is supposed to be for 10" ducting, but the transition mount that came with the hood is only 9.5 inches. What should I do?

I recently purchased a range hood that is supposed to work with 10" ducts, but when I measured the transition mount that came with the hood (pictured below), it's actually only 9.5" in ...
Alex's user avatar
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3 votes
1 answer
303 views

Issues with portable A/C exhaust into ventilation system?

I live in the UK (where air conditioning units, and thought for where they'd go, is very uncommon in homes), and where the temperature in summer is increasing every year. I also live in an apartment ...
JP.'s user avatar
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2 answers
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Is there a benefit to venting a shower in an otherwise unvented house?

I recently purchased a home built 40 years ago. It was owner built, who was not a contractor. The home 1800 sq ft top level and 1300 sq ft finished basement. There are no sewer vents. Toilets have ...
ordiver1's user avatar
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0 answers
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NSPC bathroom venting Diagram Correct?

I will start a description from the top of the page. The label there says vent and it goes up to the roof (2 stories). Right beside it is a 3" stack that is carrying the waste from a full ...
Mrordinary's user avatar
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148 views

Can I connect my dryer to the wall duct without a connector?

Is it possible to attach my dryer's exhaust port directly to the vent duct without a connector? Obviously I'll need to secure the 2 together, but I'm trying to have my dryer as tight as possible to ...
dgduhon's user avatar
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4 votes
1 answer
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Where can I place a direct vent termination location for water heater?

Location: U.S. I'm trying to figure out all of the clearance distances requirements and looking for the best place to vent a new direct vent water heater. As you can see by the image, the existing ...
SlowSL's user avatar
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4 votes
2 answers
6k views

How do I vent the plumbing for my basement bathroom?

I'm trying to determine how to best vent plumbing for basement bathroom I am putting in. The nearest main stack is around the corner and kind of a mess with connections. I'm not sure I'd be able to ...
Kevinicus's user avatar
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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 ...
OneAlaskan's user avatar
2 votes
1 answer
584 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
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2 votes
1 answer
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Can a laundry sink drain be moved downstream of an existing vent? [closed]

Context: I am 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....
Max's user avatar
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3 votes
2 answers
379 views

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 ...
Jimbo's user avatar
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1 vote
2 answers
960 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 ...
Chris's user avatar
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2 votes
4 answers
891 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&...
Dustin's user avatar
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1 vote
1 answer
759 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 ...
Chris T's user avatar
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0 votes
2 answers
66 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
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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 ...
JeffB6688's user avatar
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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 ...
BLR's user avatar
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1 vote
0 answers
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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, ...
Justin's user avatar
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2 votes
1 answer
4k 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 ...
Will Sargisson's user avatar
1 vote
0 answers
78 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, ...
Jonathan Narwold's user avatar
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1 answer
115 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, ...
Mrbungledisco's user avatar
3 votes
1 answer
978 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, ...
McNabbHome's user avatar
1 vote
1 answer
457 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 ...
Benjamin Hodge's user avatar
0 votes
2 answers
143 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 ...
thanks_in_advance's user avatar
1 vote
1 answer
341 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 ...
Errjm's user avatar
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1 vote
2 answers
385 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 ...
Sugish r singam's user avatar
2 votes
2 answers
2k 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. ...
lemonpledge's user avatar
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1 answer
1k 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 ...
DrSAR's user avatar
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0 votes
1 answer
973 views

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 ...
Westiegwen's user avatar
1 vote
0 answers
51 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....
Brandon Haynes's user avatar
2 votes
2 answers
690 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 ...
C McKenzie's user avatar
3 votes
3 answers
7k 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 ...
Bob's user avatar
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0 votes
1 answer
962 views

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?
Lori Lowry's user avatar
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0 answers
81 views

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 ...
RCNeil's user avatar
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1 vote
0 answers
417 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 ...
sye's user avatar
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7 votes
3 answers
1k 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 ...
Anne's user avatar
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3 votes
2 answers
3k 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 ...
Bill's user avatar
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1 vote
1 answer
174 views

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 ...
Franklin's user avatar