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Questions tagged [exhaust-vent]

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18 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
41 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. ...
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2answers
39 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
63 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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3answers
57 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 ...
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0answers
35 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 ...
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0answers
40 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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1answer
137 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 ...
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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
33 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 ...
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0answers
56 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
104 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 ...
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1answer
82 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 ...
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1answer
46 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 ...
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1answer
78 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 ...
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1answer
93 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 ...
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3answers
1k 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 ...
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1answer
267 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 ...
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3answers
474 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 ...
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1answer
633 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 ...
2
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1answer
113 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 ...
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1answer
2k 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. ...
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2answers
681 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 ...
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1answer
203 views

Direct stove/kitchen exhaust into kitchen sink drain

I live in an apartment that has terrible or zero ventilation for kitchen smells generated while cooking. The exhaust under the Microwave just removes oil from the fumes and circulates the air within ...
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2answers
2k views

Wall stud in the way of vent hood exhaust

So I am in the midst of hanging a new vent hood in my kitchen and as luck would have it there is a stud nearly centered on where the vent hood exhaust needs to be. Looking for advice on the best way ...
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2answers
144 views

What is the proper way to connect a 4“ dryer exhaust to a 6” PVC wall exhaust?

Our dryer exhausts through a 4" opening, but the wall exhaust we will connect to is 6". The previous owners left an elbow / reducer, but it's beat up and basically falls out of the 6" PVC exhaust. ...
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1answer
258 views

Is the hole cut in the wall for externally vented, over stove microwaves, standard?

I have a Goldstar MV-1515W microwave installed over the stove vented externally. I want to replace it. Goldstar became LG. I contacted LG and they were unable to tell me whether a new model will have ...
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3answers
137 views

Can non-metallic cable go up a wall shaft for a furnace vent?

Pictured is the exhaust for a gas furnace, using a 3x12 double-wall insulated stovepipe. It is running up a non-load-bearing 2x4 wall sheathed in drywall. Which is apparently legal as far as ...
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2answers
39 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 ...
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3answers
916 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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1answer
799 views

Wall Oven and Microwave Vent to Attic

I bought a house that has a microwave & wall oven combination. It's a Kenmore model from 2008. The microwave & wall oven combo vents through a metal pipe (about 4 inches) that runs through ...
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2answers
102 views

Extract air in bedroom with no other vent

I have purchased a MORI HR 150, which is an extractor vent. It has an "alternate flow" and "extract only" setting. I want to set it on extract only, which means it will take the air from inside and ...
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1answer
6k 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
150 views

Can inline range hood exhaust fan damper be safely/legally installed,1st floor of 2 story apt

I live in a 2 story apartment. Whenever the tenants directly upstairs turn on their range hood exhaust fan, I get whatever they are cooking/burning in my apartment. I have pulled down the range hood ...
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2answers
91 views

Natural Gas water heater safety designs

Do new gas water heaters have safety features that shut off the gas valve if they over heat? I have one that the pilot will be off and water all around the tank but we cannot find out where the water ...
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1answer
149 views

Adding exhaust fan to semi-rigid dryer duct

I recently moved into a new house purchased by my friend/roommate/landlord. I plan on setting up my electronics workshop in the basement laundry area this weekend. Although there is plenty of space, ...
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1answer
118 views

Bathroom exhaust in finished attic

I have a finished attic with bathroom where there is currently no exhaust. I am thinking of installing an exhaust fan in this space. I have following questions. 1) Can I install a fan that directly ...
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3answers
74 views

Shower in one bathroom causing moisture in the second

We have two bathrooms side by side on our second floor. They both have the same exact layout (about 6'x7'). Both have their own separate exhaust fans (Nutone, 80CFM, 1.6amps), but share the same vent ...
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0answers
2k views

Prevent cold air from coming in through bathroom vent

I am considering building a vent with a fan in my upstairs bathroom that would exit out of the roof. Since the bathroom is in the center of the house it cannot easily be vented to the side of the ...
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1answer
1k 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 ...
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1answer
134 views

Placement of inducer for gas hot water tank

My sister has lived in her house about 3 years, inspection was fine and no issues since. Hot water tank started leaking, the installer for the new one says that the inducer with double wall b venting ...
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0answers
56 views

Can mold growth be removed and cleaned up in a two-story apartment building successfully?

I live in an apartment building that has 24 units which all the bathrooms vent into the hollow walls or their neighbors bathrooms upstairs. (so in their ceiling, the smell and moisture comes out ...
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1answer
2k views

How to prevent birds from entering a dryer vent?

Both of my neighbors have had issues with birds nesting in the vents in each of their houses. Securing the bathroom exhaust vents against birds seems straightforward to me: simply replace the vent ...
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2answers
698 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 ...
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3answers
407 views

Can I unplug attic fan over garage

I recently moved into a new house and during the inspection, the inspector noted that there was a fan in the attic space above the garage. He also mentioned that I could probably just unplug it ...
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2answers
339 views

Noise reduction hood @ exhaust vent

I live on a busy street in San Francisco and recently installed an exterior exhaust vent line for my range hood (it used to be a worthless recirculating type). Doing so has increased the street noise ...
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3answers
452 views

Will a high efficiency furnace vent etch the brick on my house?

My neighbour just informed me that they had to change the vent on their high efficiency furnace. The furnace vents between our two houses and it used to have an elbow on it directing it along the ...
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2answers
571 views

Is it common practice to combine room and dryer vent ducts?

Is it common practice to tie the exhaust vent to the dryer (gas) vent pipe in laundry room with no windows? I can find no separate pipe for the ceiling fan/vent in the attic . I am experiencing ...
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0answers
213 views

Backdraft issue w/bathroom exhaust and dryer connected to same air outlet

I live in a condo where a dryer and bathroom exhaust both connect into a Y connector that flows into the same pipe and into the building air shaft. I understand that these two appliances on the same ...
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3answers
7k 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 ...