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Questions tagged [exhaust-vent]

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1answer
34 views

Furnace heat duct for basement

I'm trying to install a heat exhaust vent on the side of the drywall in the basement, see pic. The issue is that the the register is too small for the boot. This is normal if the exhaust is in the ...
36
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3answers
5k views

Why do gas water heater exhausts have an air gap before the chimney?

Every conventional (i.e., non-direct-vent) gas water heater I have seen has a roughly 1" vertical gap between its exhaust port and the exhaust vent (or "chimney"). See photo below. What function does ...
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1answer
26 views

Bedroom Install of a Takagi T-H3-DV-P - 199,000 BTU Propane Indoor Condensing Ultra-Low NOx

I'm in the process of a remodel, though I need to do it in phases. third or 4th phase down the road is to use part of the Master bedroom and make a Laundry room with some of the space. Though I ...
2
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2answers
62 views

Does an 8“ round to 10x3.25” elbow exist?

I have open space above cabinets and wife does not want a chimney on our range hood. SO I am looking for an elbow that will take the 8" round vertical exhaust and go 90 degrees into a 10x3.25" (we ...
7
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4answers
45k 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 ...
0
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1answer
2k views

Extend dryer termination away from condensing unit

How can I extend my dryer's exhaust vent away from my A.C. condensing unit using the existing outlet? It currently looks like the picture below. I don't know if the vent going through the wall is ...
0
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1answer
46 views

How to retrofit existing kitchen exhaust fan

I'm remodeling a kitchen that is circa 1940's. In the kitchen is an exhaust fan that sits inside a 3.25x10 duct. I would like to keep an exhaust fan in this location and re-use the existing duct, ...
1
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1answer
38 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 ...
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0answers
55 views

HVAC Exhaust Routing Question

Just wondering if I could get some advice on the optimal way to route the HVAC Exhaust piping. Enbridge replaced the supports underground and before they turned the gas back on they did an inspection ...
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0answers
30 views

can I vent a bathroom vent through an existing gooseneck?

Can I vent a bathroom vent through an existing gooseneck attic vent? I already have another gooseneck and two gables along with soft vents.
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2answers
65 views

Can a Dryer with a 4“ exhaust safely vent through a 3” pipe?

During some home-improvement, we need put in some new dryer venting. The most aesthetically pleasing option is to have a 90deg turn out of the dryer, then into a 3" pipe that goes for 9 feet. There is ...
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3answers
1k views

Additional exhaust vents needed for whole house fan

I need ~8-10 sq ft of additional exhaust vents to accommodate a new 7600 cfm whole house fan. Uncertain if add'l soffit vents needed for adequate ventilation flow through attic. Planning to install ...
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0answers
26 views

Codes for range hood exterior wall locations?

What are code requirements for location of residential range hood exhaust on external wall relative to windows?
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2answers
78 views

Using existing exhaust stack for new furnace

I'm about to replace the furnace in our house. The existing furnace uses a 6" stack through the roof. I know most new furnace installations just use PVC and poke out of the wall at about ground level. ...
3
votes
1answer
485 views

How should I attach laminate foil dryer transition duct?

I've got a laminate foil dryer duct coming up from the crawlspace. I need to attach my dryer transition duct to the exhaust duct, but these really don't like to go inside one another since they're ...
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3answers
97 views

Does using an existing attic exhaust pipe to also serve air flow from a range hood cause smells/micro particles of oil/soot/etc to get into attic?

Our kitchen renovation contractor decided to change plans on us and vent the range hood out via the same pipe as was pre-existing to passively control the temperature in our attic, instead of vent out ...
5
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4answers
20k views

Is an exhaust fan over a gas range required?

Are we required to have one in a standard kitchen with a gas range in a residential home? The big question is not how many CFM or ducted or not, just whether there is a requirement in the building ...
5
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2answers
21k views

How can I prevent the clanging of my extractor fan vent cover?

I installed this exterior vent for our oven extractor fan However, the metal plate in the vents keeps swinging open and closed when it gets windy and we can hear it in the house to the point where ...
3
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3answers
2k views

Can I blow dryer exhaust into a pillow case or sheet?

Go ahead and laugh. It's okay. Before you do, though, hear me out. My dryer has been drying less and less lately. Today, it stopped drying. Now I have a full load of wet laundry and it's all the ...
1
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2answers
92 views

Outside dryer vent clogs with lint

A few days ago our dryer started complaining about a blocked airway, so I went up on the roof to check out the vent and sure enough the screen was completely clogged with lint. It's a new vent that ...
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0answers
146 views

Best way to shield microwave and cabinets from stovetop steam

We recently installed new cabinets in our kitchen and we also had our microwave vented to the outside. From this two problems have arisen. the Samsung microwave now sporadically gives a C-F0 error....
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5answers
7k views

Exhaust fixture for venting bathroom fan through roof

I'm planning to install a roof vent for a bathroom exhaust fan I'm putting in. I'm thinking about using one of these: but I was wondering if I need to worry about it getting blocked by ice or snow? (...
1
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1answer
120 views

furnace exhaust - move for renovation

We are in the US. We have a 95% efficient furnace that exhausts to the house in a straight line from the furnace to the wall. We are building an extension to the house and the exhaust will now be a ...
1
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0answers
40 views

Concerns with installing 4“ Dryer Booster Fan into 7” duct

Our new-to-us home was built in 1850, so there's been a lot of oddball things done to it's guts over time. One of these is the dryer vent duct work that looks to have been installed sometime in the ...
2
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3answers
27k views

Two dryers connected to the same exhaust via a “Y”. Backdraft problems?

I have two dryers (one gas, one electric) and their exhaust pipes are merged with a "Y" to a common exterior exhaust. I'd like to keep it that way to minimize cuts through the wall (and eventually I ...
1
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0answers
43 views

unique ? about venting tankless water header

I am installing a tankless water heater at the house. My question is unique because I can not find a reference anywhere in the code and the installation manual about where to place my exhaust vent. I ...
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5answers
19k views

How to fit 4" rigid aluminum duct vent in between walls when there is an angle brace?

I want to do what these people have done here: The problem is I have bracing going diagonally and it is not leaving enough space for the 4" aluminum duct vent. Can I saw the bracing off for the 1 ...
0
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1answer
380 views

Do we need a gable vent, and in either case, how to vent bathroom fan outside (can it be via the gable)?

We need to put a hole from our attic to the outside, one way or the other. Before making any holes, I hope to hash out the details. Here's the goals: Make sure attic is properly vented Direct ...
6
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2answers
1k views

Bathroom Vent Fan Upgrade

I am upgrading an undersized bathroom fan that is 50 CFM and has (possibly) a 3" to 4" exhaust pipe. The new fan, which is 150 CFM requires a 6" exhaust pipe. Do I need to rip out the existing vent ...
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0answers
34 views

Do I need to replace the water heater vent pipes if they have salt corrosion?

I was in my attic improving the insulation and I found that my exhaust pipe for the water heater has salt/corrosion all around the seams. Based on what I found, this is either caused by inadequate ...
1
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0answers
64 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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0answers
126 views

Furnace draft inducer switch tripping

I have an older furnace and a brand new natural gas instant water heater that I installed. I only start this way because the furnace had one thing break last year, so I'm not sure if things on it are ...
1
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1answer
210 views

Downstairs exhaust fan venting into upstairs?

I recently purchased a bi-level home with two full baths. The inspection didn't include ductwork, but it seems to me that the downstairs bathroom is somehow venting into the rest of the house. There ...
0
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1answer
52 views

What is required clearance from mechanical exhaust to garage door?

I'm looking to add a new tankless water heater, which allows for pvc exhaust. In California, USA, I think clearance requirements for a door is four feet horizontally or one foot vertically. Does this ...
2
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1answer
8k views

What should I do about a hole in my dryer hose?

My cats tore a hole in our electric dryer vent hose, and I used the dryer to dry-clean a sweater using one of those sheets that you put in the dryer. Now I'm really worried about the fumes in the ...
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0answers
1k views

Connecting dryer vent in new window

We just had some old windows replaced with glass block in the basement. The installers added a window with an attachment to vent the clothes dryer but, of course, it's different to the one in the old ...
8
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6answers
35k views

Can I modify the vent from my high efficiency furnace to prevent possible damage to the exterior of my home?

is my high efficiency furnace vent installed properly? I'm based in Toronto, Canada. In some recent cold winter weather, the exhaust is causing a lot of ice buildup on the surrounding brick. To my ...
0
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1answer
114 views

How to modify and redirect the tankless water heater steam exhaust away from the house?

I am seeking help from this community to come up a creative solution on how to make a minor/elegant modification to direct the steam exhaust to go outside and away from the house. Right now, it will ...
0
votes
1answer
827 views

How best to secure rigid duct near a ceiling penetration

In order to vent a kitchen cooktop exhaust hood I am running rigid 6" round metal duct from my ceiling to a roof vent. The cooktop is on the front wall of my house. For aesthetic reasons I wish to ...
6
votes
4answers
78k views

Can I vent a bathroom through the soffit if I use a product designed for it?

I am looking for some clarification. I have been reading about installing an exhaust fan in a bathroom, and I have been reading that you should always vent to the outside, but I continue to read that ...
3
votes
2answers
835 views

Should I vent 2nd floor bathroom exhaust down?

I am looking to install an exhaust fan in a bathroom where one does not already exist. I've read that it is preferable to run exhaust ducts down instead of up, but does that apply here? We would be ...
1
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3answers
8k views

Why does my boiler vent steam?

My understanding of a boiler system is that it is closed, meaning the water stays in the pipes and constantly recirculates. However, there is a vent (3" PVC pipe) that is connected to it that ...
0
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3answers
2k views

Connect 4“ Dryer Vent Duct to 4” Exhaust Pipe

I just had a new dryer installed. The installer said I needed to buy a pipe reducer because the dryer vent duct and the exhaust pipe are both 4". He cut some holes in the dryer vent duct to fan it ...
0
votes
2answers
60 views

Do I need to be concerned about moisture around dryer exhaust?

I have a dryer stacked on top of my washer and the exhaust duct attachment point is elevated off the ground. Or contractor had to build out the wall and create an area where the plumbing, gas and ...
1
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1answer
356 views

Connecting dryer to dryer vent

In all the youtube videos I see, dryers are connected to dryer vents via flexible hose. One end is clamped to the dryer and the other is attached to a plug that fits into the vent I bought a vent kit ...
1
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3answers
558 views

Very low humidity levels in new construction home - over ventilation?

I just purchased a new home in the suburbs of Boston with move in date of November 2017. The home has felt unusually drafty and cold and i've had to increase the heat about 4 degrees above what I ...
2
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1answer
221 views

Did I install this roof vent correctly?

I’m installing a roof vent to exhaust a new kitchen cooktop. I put a 6” hole in my roof and fit this painted metal vent between the asphalt shingles. I have sealed around the roof penetration l, under ...
3
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1answer
3k views

Possible source of dripping from bathroom exhaust fan?

During the winter, I experienced "Chinese water torture". The bathroom exhaust fan is located above the toilet. While seated on the throne, drops of water would hit my head every so many seconds. ...
2
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2answers
856 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 ...
7
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4answers
58k views

Why is a gas furnace vented but a gas dryer is not?

I live in a house in Ohio and I have four appliances powered by natural gas: furnace, water heater, dryer, and kitchen range. Of these, only the furnace and water heater are vented to the outside of ...