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7
votes
2answers
1k views

How do I balance air outlet/inlet valves without an airflow meter?

As my local hire shops (UK) don’t stock airflow meters, I am trying to find another way to balance our newly installed MVHR (mechanical ventilation heat recovery) system. Firstly I need to set the ...
1
vote
2answers
11k 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 ...
4
votes
3answers
935 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 ...
7
votes
1answer
3k views

How can I catch more lint in my dryer?

In the 3 story townhouse I'm currently in, the contractor originally built the (stackable) dryer vent to go straight up from it's location (top floor), then when it gets above the ceiling, it angles ...
3
votes
1answer
306 views

How should I attach laminate foil dryer transition duct?

I've got a laminate foil dryer duct coming up from the crawlspace. I need to attach my dryer transition duct to the exhaust duct, but these really don't like to go inside one another since they're ...
4
votes
1answer
889 views

How can I drill through rim joist/sheathing for a dryer vent?

I want to vent dryer through the rim joist of this home but it looks like this home has some sort of stone sheathing underneath the cedar shake. I can only see it from the basement. I can't really ...
3
votes
4answers
2k views

Should I drill a large hole through a double paned window?

I have a laundry room in the basement. There is no exhaust vent for the dryer. Currently we just open the window when drying, but this is not the greatest solution. There is a window and it is ...
2
votes
0answers
483 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 ...
2
votes
1answer
219 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
6k 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 ...
8
votes
2answers
15k views

What are my options for venting a bathroom exhaust fan?

I would like to install a fan in our bathroom which currently has none. However, I'm very confused regarding the best approach for this. Above the bathroom is an attic space. I have read that ...
5
votes
3answers
617 views

Why not put a vent that pushes air from the attic into house?

I have this idea, and since it seems logical to me, but I don't see it anywhere I suspect I am missing something.. so here it is: Why not put a vent that pushes air from the attic into house? At ...
2
votes
1answer
833 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 ...
6
votes
2answers
5k views

Do I need soffit vents when I have 2 gable vents and 5 normal peak vents?

We are in southeast Idaho, have a plain simple gable roof on a 1,050 square foot floor house; the roof's pitch is not great, probably 3 or 4/12 but normal for our area. We have 1 vent at each gable ...
4
votes
1answer
10k views

Is it better to vent a bathroom fan out the soffit, the side of the house, or the roof?

Working on a friend's house, we're installing a bathroom fan. He had planned to vent the fan out the closest soffit, which is only a few feet away. I'm trying to persuade him to vent it out the roof ...
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 ...
7
votes
3answers
858 views

Would running a band saw or cnc machine in my basement be safe?

I'd like to get a band saw and drill press but I don't have room in my garage so I'd like to put it in my basement. The problem is I don't have any ventilation to remove sawdust so would having it in ...
4
votes
1answer
2k views

Attic ventilation - intake:exhaust ratio vs total ventilation area?

I have decided to go ahead and install a ridge vent in my house. The only current attic ventilation is soffit venting on one side of the house. As part of this project, I am attempting to determine ...
6
votes
4answers
858 views

Is there a recommended vent for new roof?

I am redoing my roof. I already decided to add sofit ventilation which I currently do not have. I have gable vents, and already decided to go with normal eyebrow vents Vs ridge ventilation. Question ...
2
votes
1answer
336 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
405 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
0answers
618 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 ...
3
votes
3answers
5k views

How do I air-seal a range hood flute?

My new kitchen included a new exterior flute for a new range hood. Few months later, I opened the cover for some maintanace reason and saw that the flexible flute is basically going through the ...
2
votes
1answer
788 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 ...
4
votes
2answers
4k views

Can I fit an extractor fan in a window?

We have a basement flat and we suspect that the bathroom exhaust fans do not go anywhere, which causes a fair bit of damp in the flat which manifests itself as condensation on the windows in the ...