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Questions tagged [exhaust]

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6 votes
2 answers
2k views

Water heater exhausting inside house

I have this I think standard gap between water heater and chimney. Due to house being colder inside than outside in summer time, I think the pressure difference is not allowing the exhaust to go up ...
Franklin Gray's user avatar
5 votes
1 answer
5k views

Is a 6" Hole through a 10" Rim Joist ok?

I've got a question about venting through the rim joist. I'm building out my basement workshop and I'm going to install an exhaust fan. The exhaust fan needs an exhaust pipe. The most direct route is ...
Jacob Wicks's user avatar
4 votes
3 answers
3k views

How can I prevent cold air from dropping down my bath fan duct?

In my new home, on the second floor, the bathroom fans goes outside and under the roof, so the output is upside down. They installed the type of vent with a flap that, normally with gravity and ...
Benner's user avatar
  • 41
3 votes
3 answers
580 views

Replacing a compact fluorescent bulb in a bathroom exhaust fan with an LED bulb?

I have a bathroom exhaust fan that has a built-in light that is a compact fluorescent bulb. It does not provide sufficient lighting (2400 lumens) and they do not produce a replacement bulb that is ...
Tom's user avatar
  • 31
3 votes
4 answers
12k views

Will a 4", 100CFM bathroom exhaust fan work with 3" exhaust duct?

The bathroom is 112x80x96. The duct to outside will be 3-4' at the longest. This is a 100CFM 25W, 4" fan. The only reason why I want to buy this one is because it has humidity sensor and timer ...
MiniMe's user avatar
  • 3,422
3 votes
2 answers
709 views

Could clogged exhaust cause codes 13/33 on my furnace, and how do I check and clear?

My Carrier Performance 96 series furnace (similar to the 59TP6 currently shown on Carrier's website, but I don't have the exact model number in front of me) has been showing codes 13 ("Limit Circuit ...
Moshe Katz's user avatar
  • 2,705
2 votes
1 answer
2k views

Bathroom fan too loud

I recently installed a new bathroom fan in our master bath in hopes for a much quieter environment. I installed a NuTone Model # AERN110 (110 CFM, 1.0 sone). I've never had an ultra quiet exhaust ...
Darren's user avatar
  • 21
2 votes
2 answers
2k views

Furnace exhaust vent on roof freezing

My furnace exhaust pipe vents out through the roof. How do I prevent ice accumulation from blocking the exhaust pipe? I have a high efficency furnace. We replaced our gas furnace with a high ...
Lori's user avatar
  • 29
2 votes
1 answer
10k views

Venting Two Bathroom Fans to Single Roof Vent

Can I have two different exhaust fans in the same bathroom on the same switch. ? (I.E. on/off at the same time, both ducting to a y-adapter attached to a single roof vent opening). One fan uses 4&...
Brister's user avatar
  • 21
2 votes
2 answers
1k views

Combine two bathroom exhaust vents?

I have a tiny bathroom for the toilet, perhaps 83 cu ft adjacent to the master bathroom for the shower and tub, perhaps 1266 cu ft. Currently only the toilet has a vent with a fan. It’s being removed ...
DIY Tom's user avatar
  • 21
2 votes
1 answer
2k views

negative pressure/backdraft with boiler

Summary For heating in my house, I've got a Burnham Series 2 (model B) gas boiler, and with all the snow this past winter (I live in Boston) I've had problems with backdraft causing the boiler to ...
minou's user avatar
  • 377
2 votes
0 answers
164 views

Thru Wall Exhaust Fan in bathroom on window header

I am trying to add a thru-wall fan in my 1st floor bathroom. The bathroom is 59 inches wall to wall. There is a window of 41 inches. I want to add the fan above the window, but i found a window header ...
Srinivas Ven's user avatar
1 vote
1 answer
514 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 ...
Nitin Alabur's user avatar
1 vote
3 answers
1k views

Size of insulated flex hose needed to install for bathroom exhaust?

What size of insulated flex hose do I need to install for bathroom exhaust. Fan is 110cm. Length of hose in attic is approx 15-20 ft, going just about straight to the exit site. Bathroom size is ...
donna's user avatar
  • 25
1 vote
1 answer
199 views

Cutting out existing steel duct in bathroom vent

I'm enlarging my bathroom vent. It's a brick wall and currently has a steel duct. I've chipped away brick but the lip of the existing steel duct is still there. I need to remove around 2 inches of it. ...
edd91's user avatar
  • 11
1 vote
1 answer
741 views

How should I connect my bath fan to the three cables in the ceiling?

I have red-white-black wires coming from my switch and 2 sets of house wires (black-white-grnd). Can someone tell me how to tie these together with a new fan that has two white, one black and one blue ...
cribby's user avatar
  • 11
1 vote
1 answer
231 views

Hvac damper types - which one is quietest

I'm trying to minimize noise in a lampwork shop exhaust system. The system consists of a 1/2 hp squirrel cage type blower connected to the shop space with 8" round ducting. I am installing a ...
Brian Ford's user avatar
1 vote
1 answer
1k views

Vibrating PVC exhaust pipe from high efficiency furnace

We have a two year old house that has this heating season developed a vibration in the exhaust pipe that can be heard on the first floor of the house. It seems to have decreased as the season has ...
John Kiczek's user avatar
1 vote
1 answer
2k views

OK to cut double top plate to clear exhaust duct?

I am installing a exhaust fan duct in my 1st floor kitchen. I had planned to go under 2nd story joists/above kitchen cabinet, thru the wall. Unfortunately, the desired location on the wall would split-...
peinal's user avatar
  • 1,271
1 vote
1 answer
98 views

bathroom vent problems

I live in a townhouse(built in 1971 with no privacy wall between my neighbors attic) Between the two units there are 4 static vents and no other source of venting. The attic space would be about 400 ...
confused's user avatar
1 vote
2 answers
27k views

How long can I run a vent duct for a new bathroom exhaust on an old house that doesn't vent out properly?

all. I live in an old Edwardian home where the attic above is a finished loft space so I can't run any ducts upward. I have a second floor bathroom below that needs to be vented correctly. Right now ...
Adrien's user avatar
  • 157
1 vote
2 answers
2k views

Are my direct-vent water heater flues installed in a standard manner?

We recently moved into a property with 2 water heaters installed in the basement. During the inspection, we were told that the water heaters were relatively new, but the exhausts were "odd". ...
rs79's user avatar
  • 261
1 vote
0 answers
53 views

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?
Jim Hindle's user avatar
1 vote
0 answers
1k views

Exhaust vents exiting outside next to each other

Is there any code that requires exhaust vents specifically for bathroom, Kitchen hood, and clothes dryer to terminate ‘x’ distance apart? For instance, placing these three exhaust exits on the same ...
Thomas_P's user avatar
1 vote
0 answers
171 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 ...
Steve's user avatar
  • 111
1 vote
0 answers
86 views

carrier infinity 96 furnace extended exterior exhaust concerns

Due to severe wind and drifting snow that has blocked my furnace exhaust pipe I have extended the exterior intake and exhaust pipes approximately 8 ft up. The exhaust right angles out below my eaves ...
user65136's user avatar
1 vote
0 answers
1k views

Might I have 2 vents for my gas dryer?

I have a gas (propane) dryer. We just had a huge amount of snow 5ft. plus drifts around my house. This morning I turned on the dryer and started to smell propane. I went out and cleaned out the lint ...
Worried in PA's user avatar
0 votes
2 answers
282 views

Move rangehood fan inline

I have one of these rangehoods, the fan is built in directly above the filters so its noisy as hell when you run it. I don't really want to spend $1K+ on a new "silent" rangehood, I was wondering if ...
Marklar's user avatar
  • 101
0 votes
1 answer
2k views

Why does my bathroom exhaust fan blow downward?

Replaced exhaust fan and now air blows down into bathroom vs. out the exhaust vent.
Janine's user avatar
  • 1
0 votes
1 answer
266 views

moisture problems in a 104 sq ft bathroom with 110 cfm fan

I have a primary bathroom which was just remodeled. Our GC put in a 110 CFM fan tied to a 4" duct. The exhaust should be taken to an external vent. https://www.lowes.com/pd/Aero-Pure-Low-Profile-...
AMC's user avatar
  • 103
0 votes
1 answer
124 views

Exhaust Fan Runs With No Power at All!

How can my furnace exhaust fan run with the power off, the thermostat off, and the breaker off?!
Patricia Mitchell's user avatar
0 votes
1 answer
280 views

Draft coming out of water heater vent intake

I have a power vented water heater. The PVC exhaust pipe runs up in to the ceiling then horizontally outside my house. This was installed by professionals, not DIY. The outlet at the back is ...
Doug Moscrop's user avatar
0 votes
2 answers
88 views

Outdoor exhaust pipes from my heating system

What happens if snow covers my outdoor exhaust pipes from my heating system in the winter?
user76221's user avatar
0 votes
1 answer
75 views

What is this pipe that is next to our house and HVAC?

We bought a house and it has this next to the HVAC. It looks like a pipe that drains into this cement box that has another pipe inside the cement box going into the ground. There is electricity ...
Megan's user avatar
  • 1
0 votes
1 answer
159 views

Shower as humidifier -- yea or nay?

During the winter I often do not run the bathroom fan during/after a shower, figuring the house can use the additional humidity. Of course that means waiting for the water vapor to diffuse out of this ...
keshlam's user avatar
  • 30.2k
0 votes
1 answer
74 views

Inducer fan is running but the control board doesn't see it

My Armstrong 51HWC183A-3B furnace is giving me 2 blinks as an error message. According to the manual, the error means: Pressure switch closed while inducer not running The problem that the inducer ...
Mike Schawartskof's user avatar
0 votes
1 answer
563 views

Outside cap for exhaust fan

What is the best cap to use for a thru-wall bathroom exhaust fan install? The ducting is 4" smooth aluminum. Winters here are brutal. I'm concerned about wind sucking the cap flaps open, letting ...
TedKat13's user avatar
0 votes
1 answer
2k views

Exhaust Fan in small half bathroom on first floor

Hi, I would like to add an exhaust fan in my small half bathroom on the first floor (it’s a 2 floor semi-attached home). The bathroom becomes very humid and takes a few minutes to eliminate odors. I’...
Nis's user avatar
  • 21
0 votes
1 answer
108 views

Dryer exhaust pipe

M1502.4.1 Material and size. Exhaust ducts shall have a smooth interior finish and be constructed of metal having a minimum thickness of 0.0157 inches (0.3950 mm) (No. 28gage). (a) can I use metal ...
firefiend's user avatar
0 votes
1 answer
2k views

Gas Furnace blowing hot air into room, flue is cold

We have a 2-year old gas furnace connected to water pipes and radiators throughout the house. It just turned on for the first time this year and is blowing a large amount of very hot air directly into ...
user77025's user avatar
0 votes
1 answer
694 views

How can I adjust a whole-house ventilation bathroom exhaust timer?

We have a home built in 2008 in west-central Minnesota. As a cost-saving (I perceive it as such, and may be mistaken) measure to fulfill air quality and venting code, the builder set up an upstairs ...
alt's user avatar
  • 1,817
0 votes
1 answer
52 views

Where to run 4" exhaust fan duct?

I'm installing an exhaust fan in my bathroom. I plan to install it somewhere left of the octagon box that you see in the picture, However, there's a 5 3/4" joist right there. I'm not sure if I ...
Scrap Money's user avatar
0 votes
0 answers
41 views

Bathroom Exhaust - Idea

I am doing a major remodel of my primary bathroom. Instead of the traditional exhaust fans I am thinking of doing something like: Run 3x14" duct in the wall stud cavity from the bathroom ...
JoeLeBaron's user avatar
0 votes
0 answers
37 views

Bathroom exhaust vent

After my modular house was delivered i had the house sided. For some reason the siding guys went right over my bathroom exhaust exit. I have an idea where it is and the plans show it’s 36 inches off ...
Chris's user avatar
  • 1
0 votes
0 answers
28 views

Bathroom fan light combo power source is in ceiling..from 12/2 to 12/3 to gfci to a double pole switch

Remodeling bathroom...removed light installing exhaust fan light combo...power source is already in Ceiling which is 12/2..from the 12/2 it will turn into 12/3 to go down to a gfci outlet and from ...
Jeremy's user avatar
  • 1
0 votes
0 answers
18 views

do they make a a exhauster fan for the 3inch double wall hot water exhaust pipe

this is a older home with large trees. at night times we get exhaust gasses from the hot water heater and I would like to find a inline exhaust fan that I can install.
david's user avatar
  • 1
0 votes
0 answers
558 views

I need a ducted vent hood over my gas range and microwave., t would like to leave my over the range microwave. Can the hood work right this way?

30" LG gas oven; 30" Kitchen Aid microwave. Able to vent the hood through the attic to the outside.
JaneA's user avatar
  • 1
0 votes
0 answers
25 views

Bathroom ceiling exhaust fan wiring

My bathroom exhaust fan/w light has a 4th cable which runs from the fan box to a switch for a strip of 5 lights above the sink. How do I make that connection? In other words, to which black and ...
Zip's user avatar
  • 1
0 votes
0 answers
108 views

Bathroom Exhaust Fan venting

I need to install a exhaust fan for a bathroom in Dallas Texas on the first floor. The home is two story home. There are two optionsto exhaust the air out. One is exhaust the air out on the side of ...
Al bharman's user avatar
0 votes
0 answers
513 views

Outdoor direct vent tankless water heater (low nox) on exterior wall under overhang?

I have an exterior tankless heater that is one of the high-efficiency/low nox type, it has a direct vent (pretty small, actually) just sitting on the top grill. This is mounted outdoors, but is it ...
daveola's user avatar
  • 157