Questions tagged [exhaust-vent]

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1answer
112 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 ...
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1answer
321 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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3answers
16k views

Installing bathroom exhaust fan: what to do with vapour barrier and insulation?

I'm adding a bathroom exhaust fan, which is being mounted in the ceiling of the bathroom (in the attic) and venting out through a vent in the wall. right now, there is a vapour barrier (paper) ...
13
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2answers
2k 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 ...
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1answer
45 views

How do I provide proper venting for a single exhaust portable AC unit?

Ever since I got my portable AC, I've been wondering how I can make this hunk of junk more efficient because till this day, I have never been able to drop the temperature lower than 25° C. This week I ...
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3answers
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 ...
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4answers
3k 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
2k 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 ...
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0answers
38 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 ...
2
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2answers
271 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 ...
1
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2answers
170 views

Rigid or Flexible bathroom exhaust duct

In my 2nd floor condominium, I need to replace bathroom ceiling and exhaust fan. Old ceiling has been removed. My contractor is going to install new ceiling. I want to replace old exhaust fan and duct ...
6
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7answers
22k views

How do I prevent ice stalagmites from building up on the furnace exhaust?

I have a high efficiency furnace that exhausts via a pvc pipe out the side of the house, the trouble is the moisture from the exhaust forms an ice stalagmite in my driveway in the cold weather. Are ...
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3answers
116 views

What type of duct should I use for a clothes dryer exhaust?

I am planning to relocate my gas dryer to the center of my basement. The closest vent is in one of the walls 16ft/5m away. To reach it I would need to run an exhaust pipe horizontally, enclosed in the ...
8
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4answers
74k 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 ...
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3answers
53 views

Replacing Bathroom Vent Fan

Looking to replace a bathroom vent fan in a property that is being renovated. The exhaust fan was not working, upon further inspection it seems to be the motor that is causing the issue. I want to ...
4
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1answer
77 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 ...
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2answers
101 views

Close old OTR hood vent hole on exterior stucco wall

How do I permanently close and seal the old vent hole on the outside stucco wall ? Do I have to remove the old metal vent (see photo) or can I just put stucco patch on top of the metal and fill in ...
4
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2answers
30k views

In what year did venting bathroom exhaust out of the house become a code requirement?

what was the year for code for vented bathroom exhaust fan? What is the code for vented bathroom exhaust fan?
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3answers
140 views

How to properly permanently seal a duct opening?

I recently hired a handyman to install an over the range hood. To install it, he cut a hole in the bottom of the upper cabinets and routed the duct through the back of the cabinet's, into a vertical ...
3
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2answers
24k views

What can be done about this unattractive dryer vent?

The house I bought has dryer vent that runs from the dryer into the ceiling. Besides being an eyesore it is also loose/flimsy. I'm redoing the laundry room and would like to make this more ...
0
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1answer
55 views

Do these look like good PVC exhaust and intake termination ends for a new tankless gas heater?

I just had a new tankless gas water heater installed, and it seems to be working well. But looking around here, other sites, and my own HVAC system, the terminating ends seem to come out further from ...
2
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0answers
17 views

Safe to install humidifier above furnace gas vent?

I'd like to add an AprilAire 600 bypass humidifier. I plan to install the humidifier on the supply plenum, and the bypass duct on the return air. The gas vent coming off the furnace is type B. ...
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0answers
15 views

Fixing sub-optimal Tempstar furnace vent installation but can't find part numbers

I have a Tempstar N9MSE0601714A furnace with 2" PCV vent pipes (that mate to 2.5" pipes). Whoever installed it didn't fallow the installation manual and I'm also reducing the number of ...
0
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1answer
15k views

Fast trick to figure out to where bathroom fan vents out

Recently had a guy come out to clean the clothes dryer and clothes dryer vent. Asked him to clean out the bathroom fan vent as well. He looked up the attic, on the roof, and along the siding, and ...
2
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2answers
173 views

Does the combustion air inlet for a 95% HE furnace need to be sloped down the same degree as the exhaust?

I'm determining if existing 2.5" PVC furnace vent pipes can be moved inside an existing soffit box in my garage ceiling. To do this the exhaust outlet pipe could keep it's existing grade from ...
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2answers
961 views

How can I join an exhaust vent and an existing duct that aren't aligned?

I'm replacing the over the range microwave in my house, and the new microwave's exhaust vent does not align with the existing ductwork and hole in the wall for the exhaust - neither vertically nor ...
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1answer
4k 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
122 views

Will condensation form and be an issue on an aluminium duct venting water heater exhaust?

I have built the unfinished chimney shown in the image below to get the exhaust for my neighbor's water heaters (which I believe are sealed combustion gas appliances, such as the Remeha Avanta water ...
0
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0answers
36 views

How to safely bring a water heater exhaust above the roof line

Background A 5 story house in Rotterdam, the Netherlands, constructed in 1905 is divided into 4 units and each unit has its own gas water heater. The exhausts for these water heaters are aluminum ...
2
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2answers
1k 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 ...
3
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0answers
74 views

Replacing abnormal outdoor dryer vent

The louvers on my original (20 year old) outdoor dryer vent have practically seized up and I'm in need of a replacement. When I take to places like Lowes or Amazon, I only find the style which ...
4
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1answer
84 views

What is the correct placement of a 2nd story through-wall bathroom vent

I have a 2nd story bathroom which is a little too humid unless the window is left cracked all the time, greatly decreasing the efficiency of our HVAC system. I would like to install a bathroom fan ...
8
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5answers
82k 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 ...
3
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0answers
58 views

Is there such thing as secondary lint traps for rectangular dryer ducts? [closed]

I have been searching online for a couple weeks now without any luck. There are plenty of secondary lint traps that install along a run of standard 4” rigid metal duct. I’m looking for a secondary ...
0
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1answer
50 views

Bath exhaust fan issue

We closed on this new construction townhome in January 2014. 6 1/2 years later, cleaning the Panasonic exhaust fans in all 4 bathrooms, to my astonishment, basement bathroom fan has no ductwork. Fan ...
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4answers
4k views

How to seal dryer exhaust vent

I am replacing my dryer exhaust vent. Here is a picture of the old one after I removed the cap. I did my best to clean up the old caulking before adding the new tube and vent, which looks like this: ...
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0answers
58 views

How do I connect my new bathroom exhaust fan to the old duct that isn't lined up for the new fan?

The old fan died, and I'm trying to install a replacement. The old one was 80CFM, and, despite it working 24x7, the groundfloor bathroom was always a little damp. The new one is a fancy Panasonic, ...
0
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0answers
225 views

Exhaust fan in Toilet room off the master bath

I understand it is code for exhaust fan in the Toilet room (Small 4x5 room with door) this room is off the main master bathroom. Do I need another exhaust for the main bathroom for code? Can I put a ...
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2answers
5k views

Can a convection oven be used without exterior venting?

My home is 20 years old. I have a free standing stove/oven and a microwave above installed when home was new. Neither is vented and the roof is tile and exterior is stucco so I won’t be able to vent. ...
12
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3answers
4k views

Gas clothes dryer is venting into the crawl space

I have been living in a house in Southern California for 18 months and while crawling around under the far end of the house I found that there is about 2 inch deep lint over a 200 sq ft area where my ...
0
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1answer
715 views

Can I have a shared exhaust flue for a high efficiency furnace and tankless water heater?

I recently purchased and am installing a 96% efficiency two-stage gas furnace. The old unit was an 80% efficiency unit using a 4" metal flue. This flue merges the exhaust of both the hot water heater ...
3
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2answers
6k 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
172 views

Water Heater Exhaust - how to connect the 3 inch hood to four inch exhaust pipe

I'm working on this gas water heater with 3" hood almost attached to an elbow that reduces from a 4" exhaust flue. This was only attached by a lot of aluminum tape. The problem is that the ends of ...
1
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1answer
174 views

What kind of vent material can be used for gas dryer?

Dryer at present butts up to vent sticking into the room. This works just fine. I want to put the dryer and washer on a plinth to make it easier to access. I don't want to put the dryer further ...
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3answers
16k 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 ...
1
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1answer
120 views

How to terminate cooker hood ducting

I have a probably stupid question about assembling ventilation pipe for a cooker hood. I want to vent my cooker hood through the eaves rather than go through the roof as I suspect it's cheaper, less ...
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1answer
573 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, ...
0
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1answer
47 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 ...
37
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3answers
10k 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 ...
0
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1answer
33 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 ...