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0answers
40 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 ...
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2answers
49 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" ...
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2answers
32 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 ...
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1answer
95 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 ...
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2answers
77 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 ...
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1answer
188 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 ...
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1answer
59 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?
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1answer
81 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 ...
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1answer
468 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
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1answer
82 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
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5answers
277 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 ...
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1answer
86 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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1answer
45 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; ...
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2answers
88 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
401 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 ...
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1answer
143 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
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1answer
168 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 ...
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1answer
124 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 ...
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1answer
182 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 ...
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3answers
414 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 ...
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1answer
198 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 ...
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2answers
1k 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 ...
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2answers
239 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 ...
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3answers
735 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 ...
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2answers
224 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 ...
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3answers
575 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. ...
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1answer
324 views

Will combining roof venting systems cause short cycling?

I'm looking into buying a new house here in Wisconsin that has soffit vents, ridge vents and some additional static roof vents installed. However, when the home inspector came through he said that ...
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2answers
2k 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 ...
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0answers
234 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 ...
3
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1answer
246 views

Do attic vents or rafter baffles need to be as wide as the rafter bay?

What happens if the attic vents or rafter baffles don't cover the entire opening between the rafters and one or two inches of wood is left exposed?
2
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2answers
307 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 ...
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3answers
399 views

How can I stop interior doors from opening when exterior doors are opened?

In our church every time someone comes into the building through the main entrance, the interior main sanctuary doors come open and make it possible to hear noise from the hallway. Is there some ...
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1answer
286 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 ...
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1answer
530 views

Can I adjust my blinds for both ventilation and privacy?

I like fresh air so I usually open the window a little and keep the blinds to the angle that I think nobody can see me from outside. Today I feel very upset because I found out everybody can see me ...
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1answer
65 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 ...
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2answers
420 views

Can you have different types of vents on a single roof?

The attic of my house has serious ventilation issue and the sheathing becomes rotten. The roofing contractor suggests me to replace the rotten sheathing and install some ridge vent. His plan will ...
2
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1answer
1k 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' ...
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0answers
83 views

I have no furnace, only electric blowing heaters. How do I get ventilation?

I have a 100 years old building with a store on the main floor. Since the building was built over 100 years old there is no ducting whatsoever. There is also no furnace. In the summer we just hook ...
3
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2answers
297 views

Can a HVAC solve my ventilation problem?

I have a problem with my house such that with all my windows and doors closed the house smells and the air feels stale. I'm thinking of purchasing a high efficiency HVAC to vent the stale air out and ...
2
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1answer
891 views

How do I install a vent above a closet door?

I located some home theater gear in a closet directly behind our family room where the TV is located. Now the closet, a sizeable walk-in, is getting rather warm. How do I install a simple vent above ...
6
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1answer
2k views

Does it do any good to use fiberglass insulation if you're not going to drywall?

My attached garage is not insulated. When I look up, I see the roof sheathing. I was thinking of adding insulation to the garage. The problem is there is no attic space, so I shouldn't drywall it ...
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2answers
445 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
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1answer
263 views

Is continuous exhaust from basement level closet a good idea?

I have a recurring problem with mold in the closet of a basement level bedroom. After considering various options, I'm currently contemplating installing some sort of a low powered continuous exhaust ...
3
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1answer
163 views

How can I re-use a hole in wall for ventilation?

I'm renovating my bedroom and found that there's a hole in the wall beneath the wallpaper. It was plugged, but the stuff in it was old and crappy, so I took it out. Now I've got a 20x20cm (~7.9x7.9in) ...
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3answers
2k views

Should I install an exhaust fan in a new garage?

I'm having a new garage built in my home and I'm wondering if it's a good idea to have some sort of ventilation/exhaust/fan system installed while they're at it? I'm thinking of doing some spray ...
2
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1answer
656 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 ...
3
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1answer
363 views

With mechanical room ventilation is it necessary to have air supply in addition to extraction?

We are building three sound insulated classrooms which will be fairly well sealed. There will be no open windows so we're to use mechanical ventilation. I live in a warm country so heating isn't a ...
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2answers
6k 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 ...
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3answers
660 views

Why does my dryer duct have such a long vertical portion?

My dryer duct follows this path: Flex duct leaving the dryer Four feet of vertical rigid steel duct down into crawlspace Eight feet of horizontal rigid steel duct, immediately below the floor Outlet ...
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3answers
3k views

How do I maintain air quality in a newly finished basement of a 1925 home with no ductwork?

I just bought a house built in 1925 but it has just been professionally renovated, including finishing the basement as living space. The home has a boiler for radiator and baseboard heat. There is no ...