The tag has no usage guidance.

learn more… | top users | synonyms

0
votes
1answer
16 views

Can exterior exhaust vents be stacked on top of one another?

A bathroom toilet room already has an exterior exhaust vent as seen in the pic. Is it within code and ok to install another, and identical, exhaust vent directly below the current one. The Master ...
0
votes
0answers
34 views

Building a deck - can I extend the side wall vent of my propane furnace underneath it?

I'm building a low deck outside of my house, and the vent wouldn't have a 1ft clearance. Deck extends about 7ft out from the house. Would it cause any problems if I were to extend the vent's 2inch ...
0
votes
0answers
9 views

How to install rigid foam installation w/radiant barrier under a cathedral ceiling?

I'm in the process of insulating my shed-turned-office. I've installed typical fiberglass insulation in the walls, and currently have some 8x4 sheets of rigid foam insulation tacked to the bottom of ...
1
vote
2answers
72 views

Run HVAC fan throughout the day for comfort

At my old house, we replaced the HVAC with a high efficiency unit that came with a thermostat that would blow, say, 50% to 70% of the time for air movement to increase comfort level. I'm not sure but ...
0
votes
1answer
14 views

Spray to keep blown-in cellulose insulation from drifting?

I have a hip-roofed garrison colonial in New England, with blown-in cellulose. I have two whole-house fans ("half-house fans"?), and to give enough attic venting I have continuous soffit vents on all ...
0
votes
1answer
47 views

Attic Ventilation Improvement

Location: Portland, Oregon, USA area House: 1972 single story, approx 1500 sf attic area. When we bought the house the prior owners paid for attic mold remediation. I believe the mold was a result ...
0
votes
1answer
20 views

Roof Ventilation and Insulation - Midwest - Gable and Ridge vents only, no soffit vents

I have a 1920's home in Ohio, and have NO soffit venting in the house. There are 2 gable vents, with one small temp-controlled fan (set to turn on ~95 F or higher). There is also a ridge vent. The ...
2
votes
2answers
451 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 ...
3
votes
4answers
282 views

What should I look for in a Whole House Fan

I see a lot of variance in the prices of whole house fans in the market, and not a lot of clarity or comparison between vendors and models. We're looking to buy some to install in our newly purchased ...
1
vote
2answers
40 views

What is the most efficient window design to maximise cooling in a tropical climate?

I am building in equatorial Indonesia. My building is roughly 10x4.5 metres in footprint, and it will be a two storey (3.5 metres each) concrete structure. The building backs directly onto a limestone ...
3
votes
3answers
1k views

How to properly ventilate a Mansard Roof?

I recently purchased a home with a Mansard roof, I had some roofers come to give quotes to replace the top (it is finished) and they all recommend adding ventilation (known issue with Mansard's). ...
1
vote
0answers
28 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 ...
0
votes
1answer
94 views

What acceptable alternatives to trickle vents are available?

Building Regulations require new windows to have trickle vents. What alternatives are acceptable? Can I put in a wall vent instead, like a hit and miss type, or air bricks? I do not want to buy a ...
2
votes
1answer
247 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?
1
vote
1answer
66 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 ...
0
votes
0answers
38 views

Improving air flow using supply and return exhaust fan with split type air condition

I have slight issue with uneven temperatures between two rooms. Say we have two rooms, Room 1 (cold room with AC) and Room 2( without AC, hotter room). Room 2 is ventilated by Room 1 AC by opening ...
1
vote
2answers
326 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
2answers
44 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 ...
4
votes
3answers
3k 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 ...
0
votes
1answer
37 views

Wood Staining in a Garage

I am working in the garage with the garage door open as I am working for ventilation. My garage also has gym equipment in it. Am I able to use the garage again soon after or do I have to wait a day or ...
3
votes
1answer
587 views

How to avoid water build-up in bathroom's passive ventilation shaft?

Our apartment building is 23 years old, and the bathroom has passive ventilation: basically there's a hole in the wall just under the ceiling, where warm moist air slowly escapes. It usually has a ...
1
vote
4answers
10k 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
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
1answer
69 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
3
votes
6answers
24k views

How can I insulate kitchen vent to prevent cold air blowing through all the time?

Building code requires my kitchen to have a 15cmx15cm vent (besides the kitchen cook-top vent). This vent is basically a hole in the wall that reaches to the outside. The vent has grating on both ...
2
votes
2answers
661 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: ...
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
2answers
59 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?
0
votes
2answers
60 views

Using a 2 inch pipe to vent a bath fan

Hello I'm looking to install a bathroom vent in a enclosed shower on a GFCI circuit breaker. I know its recommended to use something like a 4 inch vent to vent out the stated flow rate, but since it ...
1
vote
1answer
18 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 ...
0
votes
1answer
287 views

knee wall no venting possible

My master bedroom is above my garage. There is one part of the bedroom that has a cathedral ceiling with knee walls on both sides. There is no attic above this area because the drywall goes up along ...
1
vote
1answer
312 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 ...
1
vote
2answers
170 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
28k 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
votes
1answer
22 views

Furnace and Water Heater Ventilation pipe

I have a home that was built in 1924, the pipe that vents my furnace and water heater is green and it is located in my chimney. The top of the chimney is open in my attic, you can see the green ...
1
vote
0answers
60 views

HVAC - hot air flowing on both zones when only 1 zone should be on

I have 2-zone forced air heating, with separate thermostats for each zone. Normally, if the thermostat in zone 1 triggers the system to go on, the heat will only blow through the vents in zone 1. ...
2
votes
2answers
418 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 ...
1
vote
2answers
161 views

What under-eaves vents can I use to maximize attic airflow and minimize insect infiltration?

I live in Seattle. It doesn't snow here often. Winters are cold, but temps do not dip below 32 for long periods of time very often. I live in a small, one-level 950 sq. ft. house built in the 1950s. ...
0
votes
1answer
25 views

Cold bathroom that has exhaust

So I have started to notice the bathroom with an exhaust is starting to get really cold as the temperature is getting colder. Is there something I can do about this? Should it really be that much ...
1
vote
1answer
491 views

Why would a blower motor work with A/C, but burn out with furnace?

I've gone through 2 blower motors since I purchased the home 3 yrs ago. I never have an issue with the blower when the AC runs; but it keeps dying in the winter with the furnace. I've had 2 HVAC ...
0
votes
1answer
43 views

Can I close my gable vents now that I have one solar fan?

I have an 84 yo Tudor style home in Hawaii that looked fantastic when we first bought it. Living area is 2500 sq ft. It's quite unusual to find such homes because many don't survive the termites. ...
2
votes
2answers
597 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
535 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 ...
0
votes
1answer
45 views

Can I vent room air to the outside?

The building interior gets hot during the day and stays hot during the evening when it is much cooler outside. It would be a really great option to simply vent the hot air outside instead of having to ...
1
vote
2answers
55 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 ...
0
votes
3answers
540 views

Bathroom fan with no outside vent

What's the purpose of a bathroom fan with no outside venting? One of my bathrooms is set up this way. I'm about to redo the ceiling, and I'd like to replace the fan unit with something better looking, ...
4
votes
2answers
15k views

Why am I finding condensation in my dryer?

I live in Houston, TX (Very Hot, Very Humid). In the summertime, my dryer is dripping with water, when not in use. I do not have overly excessive drying times. My dryer is vented via an unfortunate ...
2
votes
2answers
247 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 ...
1
vote
1answer
66 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 ...
4
votes
1answer
657 views

I want to permanently remove and fill-in below grade windows in multi-family building. What's the risk?

I have a 5 family apartment building in NJ. There are 2 below grade window wells that protrude from the building and into the asphalt driveway. I want to fill these in permanently with concrete ...