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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
686 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
312 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
381 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
555 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 ...
2
votes
1answer
3k 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 ...
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
660 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
3k 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 ...