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2
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2answers
224 views

Need a window exhaust fan with louvers that close automatically

I currently put a box fan in a window as an exhaust fan when I need to ventilate a room in my house. But when I turn the fan off, I need to remove the fan and close the window. I'd like to have a ...
2
votes
1answer
791 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 ...
2
votes
1answer
243 views

Is Kitchen cooktop venting required?

I'm replacing an electric cooktop with downdraft ventilation. Does building code require that I keep this ventilation, or can it be removed?
2
votes
1answer
144 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 ...
2
votes
1answer
43 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
votes
2answers
595 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 ...
2
votes
1answer
4k 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 ...
2
votes
3answers
2k 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
2answers
987 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 ...
2
votes
2answers
762 views

Can I move my furnace room ventilation intake closer to my furnace?

I live in a 3 story townhouse with a garage in the basement. Off the side of the garage is our furnace room. The ventilation and exhaust for the furnace goes to the roof. For ventilation (air coming ...
2
votes
1answer
499 views

How to remedy noisy air ducts?

I have forced air extraction with a duct running through one classroom then a second. The classroom which is ducted closer to the fan receives much greater air flow through its vents. To combat ...
2
votes
1answer
1k views

How do I use an air speed meter to measure air flow volume?

I can buy a Vane Anemometer cheaply but a Air Flow meter (with a cone) costs a lot more. Can I just make my own cone? What issues should I expect if I add a cone to a Vane Anemometer? How do I ...
2
votes
1answer
4k views

How to properly vent attic in windy/snowy areas to avoid snow infiltration?

To ask the other part of question: How bad is it to have wet insulation? that didn't get asked... How do you deal with homes that are in high wind and snowy areas which are susceptible to snow ...
2
votes
1answer
80 views

Attic ventilation, do I have enough?

I currently have blown-in insulation, that reaches the top of the attic floor. I was told by several insulation companies that I need a R value of at least 49, meaning, I need to add a good 12-18" ...
2
votes
2answers
901 views

What is the proper way to vent a dryer through a crawlspace?

I am selling a brick, pier and beam home that has a Dryer in the garage that currently vents into the crawlspace. I had run flex tubing through the crawls space to the crawlspace vent. The inspector ...
2
votes
2answers
395 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 ...
2
votes
2answers
570 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 ...
2
votes
1answer
2k 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 ...
2
votes
1answer
525 views

How can I unclog a passive bathroom air vent?

I live in a prewar apartment building. At the top of the shower, on the wall where the water comes in, is a passive vent. There is no powered fan that is installed and no nearby electrical wiring to ...
2
votes
1answer
3k views

Duct and fan requirements for stove hood

I have a commercial range, 36x24" on which I do things like stirfrying for 30 people using a 24" wok. Our hood which advertises 900CFM is performing poorly. It uses a 6" duct which has to run up 3' ...
2
votes
1answer
885 views

How can I fix this moisture problem to stop mold growing?

Background and The Problem I am trying to solve the problem of mold growing on my bedroom ceiling. The house is a California Bulgalow built in about 1940. The house is single-brick with plaster ...
2
votes
2answers
15k views

How can I improve air flow in my basement?

I have a pretty odd two floor duplex apartment with one of the rooms practically being a basement. I have previously had problems with mold, and in general the air isn't great in the basement. So I ...
2
votes
1answer
379 views

Forced air heating air inlet in crawl space

The air inlet for my electric forced air heating is a small vent on the duct in the crawl space. Although the crawl space is sealed with a concrete floor and heated (ie insulation is around the ...
2
votes
1answer
440 views

How do I deciding whether to install an attic venting system?

I live in Colorado, and the weather is starting to warm up. In a couple months, the temperatures will rise pretty high. Thankfully, I have a well insulated house (there is over 20 inches of fiberglass ...
2
votes
1answer
996 views

Need to attach deck ledger to house covering a vent

I am building a deck attached to the house, and on one side I will need to have the ledger covering a section of wall that has a crawlspace vent cover. If I have a big enough gap between the ledger ...
2
votes
1answer
68 views

Can I use the old and not used anymore furnace chimney to vent out my basement?

My chimney is not used anymore. Would it be possible or recommended to use it to vent the basement ? I would clean it and install a fan at the basement end. thanks
2
votes
2answers
434 views

How can install rafter baffle venting 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 ...
2
votes
2answers
624 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: ...
2
votes
1answer
74 views

Is it legal in a multi-unit building to draw air for ventilation from the attic? [closed]

I live (own) in a condo and the tenants above me are smokers and their cigarette smoke is encroaching in my living space. I contacted the landlord and HOA numerous times and nothing has been done to ...
2
votes
0answers
213 views

How do I remove mold and mildew from subfloor of a house with crawl space? [duplicate]

Possible Duplicate: Mold remediation in crawlspace House with crawl space has mold and mildew on the sub-floor. I've determined the cause is no vapor barrier and a leaky pipe and there is no ...
2
votes
0answers
706 views

What are good Relative Humidity and Temperature settings on an MHRV and are the settings related?

I need to configure the threshold Relative Humidity and Temperature settings on an whole house MHRV system. The way the system works is that if the RH threshold is exceeded the system increases the ...
1
vote
2answers
50 views

What's the minimum safe distance from the back of a dryer to a wall?

Let's say I have a side-venting dryer. If I don't need to run ductwork behind the dryer, how close can I safely place the dryer to the wall?
1
vote
2answers
185 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 ...
1
vote
2answers
516 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
2answers
1k views

How do I properly ventilate my pantry?

I live in a very old appartment which has a food pantry in the kitchen. The pantry has a wall outside and on that wall is a hole. What do I have to put in that hole in order to match with the pantry ...
1
vote
2answers
144 views

How can I prevent reverse air flow from bathroom fan?

I have a second floor bathroom that has a ventilation fan which exits to the roof. Whenever I take a shower there is an incredible amount of freezing air (midwest winter) that is coming in through the ...
1
vote
2answers
527 views

Can I vent my dryer 'up'?

We recently moved our dryer into the garage stacked on top of a washer. The easiest way to vent it was straight up about 6' into the attic, then a right turn in the attic 12' out the back of the house....
1
vote
2answers
27k 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" ...
1
vote
1answer
10k views

Should the flue always be open in a gas fireplace?

I have a victorian fireplace with a modern gas fire installed. The fire place has a hatch at the top to open/close the chimney, which the fitters have connected to a wire to force it to be fully open ...
1
vote
1answer
56 views

How to properly ventilate a finished basement?

I am trying to understand what is the proper way to ventilate a basement. I have a finished basement which if not ventilated starts to smell ..like a basement :-) and I don't like it. If I run the ...
1
vote
2answers
37 views

Is an Ionizer Air Purifier effective against birch pollen?

I spot an Ionizer Air Purifier Air Cleaner Air Ionizer and I want to understand whether it could help to alleviate symptoms due to birch pollen particles such as itching, tiredness and shortness of ...
1
vote
1answer
269 views

How to remove narrow metal soffit

Our 1954 home has very narrow soffits, with metal over them. The best solution I've come up with for adding soffit vents is 2 inch hockey puck style. I did a few several years ago and stopped. See ...
1
vote
2answers
353 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 ...
1
vote
4answers
9k 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 ...
1
vote
1answer
175 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
4answers
9k 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 ...
1
vote
2answers
324 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 ...
1
vote
1answer
14 views

Kitchen fan venting

I am installing a kitchen fan about 9' away from the nearest external wall. The wall there is very narrow and all I can fit there is a dryer type vent that works with 4" round pipe. Also, my spacing ...
1
vote
2answers
51 views

South Florida roof softit roof ventilation and of insulation batts

I live in south Florida and am insulating the roof by placing batts between the rafters. I'm not sure if placing the batts up against the edge where the beams and walls meet is ok or not. The rafters ...
1
vote
1answer
64 views

How can I improve my ventilation throughout my house?

I just bought my house and it stays rather cool. However I've found while painting that the flow of air through the house is limited. My vents are all on the base board/wall if you can imagine. Not ...