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2
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1answer
29 views

Can I use a split tab switch for mains voltage and low voltage?

LeGrand (Pass & Seymour) make a multi-control single pole switch with a split tab TM8113WCC, which allows for the control of two independent circuits on a single yoke (one box). Code question: is ...
1
vote
1answer
32 views

Is my HVAC system unbalanced?

I bought a home back in August and the previous owner had a new 3-ton HVAC system installed. Basically right now the HVAC is located in the upstairs hallway, and the way the duct is set up is there ...
3
votes
0answers
28 views

Best way to stop boiler steam from entering attic

I have a cape cod. The boiler is in the basement and vents to the outside about a foot above ground level. I get a considerable amount of snow melt and ice buildup in the attic section directly ...
3
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0answers
29 views

How can I prevent my furnace vent from icing up and shutting off the furnace?

How do I keep my exhaust vent from icing up in the winter. We are in a new house with a HE Furnace in a pretty cold zone. It has iced up two times now and we are only in our 1st winter. Anything I can ...
1
vote
3answers
95 views

Do I need a vent fan in an interior laundry room?

I am renovating a few rooms including an existing laundry room. It currently has one exterior window and another openable window onto an existing mudroom (which also has exterior windows). After the ...
2
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1answer
23 views

Should I be concerned about respiratory hazard from leftover/lurking silica sand from abrasive blasting (sandblasting)?

I know the media itself is a respiratory hazard while blasting (I'm told the silica sand itself breaks apart from the blasting and becomes dust-like). The area will be ventilated. However, I worry ...
2
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2answers
560 views

How much heat loss through bathroom fan vent?

My master bathroom did not previously have bathroom fan, but I installed one and have had wonderful results with keeping the steam from building up and exhausting the moist air. I am using both a fan ...
0
votes
2answers
127 views

Can we capture the hot, humid air from a gas-powered clothes dryer during winter?

During winter we run a gas-powered heater and evaporative humidifier to maintain indoor air quality. Meanwhile, every day (big family!) we run a gas-powered clothes dryer which dumps hot, humid air ...
0
votes
1answer
125 views

PVC vent pipes or concentric vent pipes for tankless gas water heater?

I am trying to select a natural gas water heater to install into my house. It has to service two bathrooms with showers and two kitchen sinks, a dishwasher, and a washing machine. I've narrowed my ...
1
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1answer
22 views

will using a ventilation system with an heat exchanger give me the same quality air indoors as outdoors?

will using a ventilation system with an heat exchanger give me the same quality air indoors as outdoors? is using a proper ventilation system equivalent to having all your windows open without any ...
1
vote
2answers
89 views

How can I prevent a bathroom fan from vibrating?

I am replacing the ventilation fan in our master bathroom this weekend. The previous one (about 12 years old) developed such a vibration over time that it managed to undo the bolt holding the glass ...
0
votes
1answer
88 views

Is sealing via tape necessary for knee wall foam board insulation.?

I have dramatically improved the ventilation and insulation situation in my house's knee wall attic space, but I have one concern. I nailed up foam board over the studs and fiberglass batts. Do the ...
2
votes
2answers
171 views

Can a lower cabinet be used over a floor vent?

I didn't see this question asked after my search but I have a wall in the kitchen that has nothing against it and we are wanting to add some cabinets but towards the right of this wall, about 5' from ...
3
votes
1answer
70 views

How do I vent metal doors?

I need to vent our metal utility closet doors. 1 3/4 inch thick metal doors. Need to supply ventilation so the heat exchange water heaters will work more efficiently. Now the closets become freezing ...
0
votes
3answers
105 views

What are my options for temperature equalization between two rooms?

Ideally a bi-directional through-wall vent + fan would be great with built in thermostats measuring both sides. I haven't found that nor am I entirely sure what to search for. Are there components ...
0
votes
1answer
83 views

How to give ventilation/exhaust to an inner toilet without exterior walls?

In our proposed home, there is a common toilet (powder room without bath) but it has no exterior wall. However, it shares a wall with another toilet. Can you please suggest a way to give ...
0
votes
2answers
133 views

Gap between 6“ dia wall thimble & 6” hvac pipe

I bought a 6" dia aluminum wall thimble to vent my 6" dia hvac steel exhaust pipe through to the outside. However, the diameter of the 6" thimble is actually 6 3/4". How do I effectively insulate the ...
2
votes
1answer
129 views

Do I need soffit vents and can I add them without taking the roof apart?

Last year, we re-roofed out 83-year old house. We removed the 3-layer cedar/asphalt shingles and laid plywood decking, 30# paper, ice-barrier and 26-gauge metal roofing. As far as ventilation, we just ...
0
votes
1answer
102 views

Can I cover the vent leading to my crawlspace?

I am renting a house that has no central air, instead we have to use window units. There is evidence that the house used to have a gas heater, and there is a 2 foot by 3 foot hole in the floor leading ...
0
votes
1answer
111 views

Everything in my house vents into the ceiling cavity. Should I change this?

After reading this question: Does a bathroom exhaust fan have to vent to the outside? I realised that the house I live in now, and everywhere else I have ever lived, everything just vents into the ...
1
vote
4answers
871 views

Should I use a Ridge/Soffit vent or Attic Fan?

I am getting ready to redo the roof on our house (shingles and some sheathing) and I am wondering what kind of venting I should add to the roof. The roof currently is not vented at all and as a result ...
0
votes
0answers
20 views

cooking on a hot&humid day

I have 2 window air conditioners in my house. None of them seem to have a setting to bring in (a little bit of?) fresh air. When we cook, the house becomes a bit smokey. Also, the vapors of freshly ...
0
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1answer
131 views

Adding ventilation and insulation with limited soffits

I’m hoping to add some insulation and ventilation to our attic. It’s a 1954 with a 1991 addition. The second floor is warmer in the summer, the original part much warmer than the addition. Current ...
0
votes
1answer
57 views

Ventilating a shed

I've just bought a house and inherited a shed with power, insulation and opening windows. I intend to use it as a home office. I'd like to store computer equipment in there, but I'm concerned about ...
0
votes
0answers
161 views

Dormers with ridge vents lower than main ridgeline

My roof contractor placed ridge vents on all peaks on my home, including the dormers. So, I have the main attic space, which is vented by a ridge vent running the entire length. I have plenty of ...
0
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2answers
7k views

How much ventilation space does a refrigerator need?

The person who built our refrigerator cabinet box only left 1" for ventilation at the top of the refrigerator. Is this enough space for proper ventilation? There is a 1" gap on either side, and a 4" ...
0
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2answers
379 views

How do I reduce the moisture under an exterior wood deck?

Existing conditions: 2000 sq.ft of deck, 3/4" x 4" cumaru planks with 3/8" spacing, over 2x8 pt joist and double 2x12 pt beams, over helical piles. depth of deck to bot of dirt is approximately ...
0
votes
1answer
770 views

Attic Venting of Knee Wall in Cape Cod

I have a cape cod style home, pictured below. The second story living space on the back side of the home is created by having a lower pitched roof. So, the front and back sides of the roof have ...
2
votes
2answers
264 views

How can I vent moisture from a small pump house?

I have a small shed, 8x7, near the house that I use as a pump/filter house for a koi pond. This building has a 7 foot deep basement made of cinder block which houses an open top settling tank, so ...
0
votes
1answer
1k views

can i use an inline exhaust to vent a kitchen and bathroom?

I have 2 bathrooms and a kitchen that are currently unvented. I would like to install an inline exhaust fan to service all three. I will be putting the exhaust fan just inside a gable that will have ...
1
vote
1answer
124 views

Exhaust fan leaking from elbow joint connected to the ceiling

I have a metal elbow joint that is leaking. It is connected to an exhaust fan in the bathroom and runs to the roof. What can I wrap the elbow with to stop the leak?
1
vote
1answer
215 views

How can I vent my roof without removing drywall?

I have a finished attic, that needs to be updated. The pitched sides of the roof are sheetrocked & insulated, the ceiling is a suspended ceiling (will be sheetrocked) and the low knee walls are ...
0
votes
1answer
4k views

Should I block or insulate my air vents for the winter?

I live in a house which consists of a 17 year old extension on a 40 something year old cottage. The two main bedrooms are the only rooms in the house with air vents. They are also two of the coldest ...
5
votes
1answer
171 views

What to use to funnel floor air vent in cabinent for proper air flow

I ripped the "floor" of the kitchen cabinet out to reveal that all along, my vent was funneling air like this, an open hole. The circular opening is about 6 inches across both ways. I need to funnel ...
7
votes
5answers
885 views

Can too much ridge ventilation be detrimental?

At my house in central Texas, where temperatures can persist at 86 - 110 degrees Fahrenheit, one side is always hot, no matter how long the A/C runs. That attic space is considerably hotter than other ...
1
vote
1answer
240 views

Gable and Roof Vents Together?

I need to add some additional exhaust venting to my attics, along with some along the soffit as well. I need some knowledge on a few things as I can't seem to find answers for them on the interwebs: ...
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votes
1answer
97 views

How do I improve ventilation above my cathedral ceiling?

I live in San Bernardino County in southern California. Half of my house has a cathedral ceiling, and the other half is traditional attic. The attic has two gable vents, one at each end of the house; ...
3
votes
2answers
153 views

How can I block this venting from rodents?

As a follow up to this question, I have two 54' x 3 " gaps running the length of an overhang in my roof supposedly for venting. I believe these to be the point of entry for some squirrels and who ...
7
votes
1answer
674 views

Why did an HVAC installer add this PVC pipe?

We recently had a VERY old central heating furnace replaced and I noticed that the HVAC installer added the following PVC pipe shortly before the inspector arrived: The metal vents were already ...
2
votes
1answer
225 views

How can I divert wind which is flowing parallel to the wall into the house?

Situation: The house is surrounded by other structures in a way that the the wind direction remains parallel-horizontal to the wall. There are a couple of windows on that wall, but amount of air ...
2
votes
1answer
343 views

Can I drywall over an exterior vent in a converted garage?

Our double-car garage had one car space previously converted into a study by a previous owner. It's a bit ugly, but a very useful space, so I'm going to make it nicer by putting up drywall ontop of ...
0
votes
1answer
148 views

How to fix a ventilation pipe to the wall?

I'm doing some renovations in my toilet/bathroom, and am currently pondering the ventilation. Here's the current situation (click pictures to get bigger versions): My toilet and bathroom are right ...
1
vote
1answer
558 views

Will this DIY window fan setup help cool two rooms in our tiny, narrow apartment?

Before anything else, here's a visual aid (embedded below) to help you through this wall of text. My friends and I are renting a second-floor apartment that’s basically one long corridor split into ...
2
votes
3answers
1k views

Need to know if this is mold or not

This may be an obvious answer to some but I know next to nothing about molds / fungus etc. Is this mold, or black mold? I've been finding it throughout my house, usually by window sills, and am hoping ...
2
votes
1answer
611 views

How effectively a pedestal fan blowing inward can bring the outside air if kept 2 feet away from a fully open window?

other Facts: Window(s) size 3.5 feet* 5 feet (width) Fan (2 nos.) Specifications Product page - specifications Sweep size: 400 MM RPM: 1280 Air Delivery: 75 CMM (What is the formula to convert ...
1
vote
2answers
5k views

How would you vent my basement bathroom fan?

I have a basement bathroom basically smack dab in the middle of the basement. The joists run from front-to-back of house. So going out either side is not an option. Going out the front is not an ...
2
votes
2answers
601 views

Which alternative will be more efficient and beneficial for Bathroom Ventilation? How?

Facts: Bathroom Size: 8 feet * 8 feet * 10 feet (Height) Purpose: (1) Increase the Bathroom air freshness during use (2) Keep the Bathroom dry for the next use Note: Intermittent Extraction of air ...
3
votes
3answers
2k views

How can I improve ventilation in my room with a window fan while filtering pollen from a nearby tree?

This is a campus building in Aalto University where you have a tree about 10 cm away from the window. The Espoo city does not allow the student organisation AYY to cut down the tree. There is a poor ...
1
vote
2answers
346 views

Is it alright for an exhaust fan to vent into the loft? [duplicate]

I live in a rented property, when I moved in a new bathroom suite had been installed. We however have had chronic condensation problems in the property. when going into the loftspace I could not ...
1
vote
3answers
1k views

How can I add ventilation to my basement office?

I have a finished basement with an office, guest bedroom and bathroom. All about 700 sq ft. I work 12+ hours in the office and really need to get some fresh air circulating by extracting stale air. ...