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Old 12-05-2011, 08:07 PM   #16
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Ventilation (intake) questions with partial overhangs


The more you get it tightened up on the attic to living space connection, the more your ventilation requirements drop.

If you are good in your air sealing details, there is no reason you can run very near the 1:300 ratio and at that point you will far exceed your requirements with the retrofit of what you have now.

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Old 12-05-2011, 10:05 PM   #17
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Ventilation (intake) questions with partial overhangs


Pull up those planks to try and seal the stud walls next to the lowered stairwell. (F.g. in plastic bags) The basement/crawl is probably wired/plumbed giving you a good air chase there. Be careful, we don't want you posting in "Drywall" next....

I agree, the circular vents are quite deceptive for their NFVA; http://www.lomanco.com/ProductPAGES/CirkVents.html

Did you air seal the basement/crawl space, to counter the "stack effect"? http://www.wag-aic.org/1999/WAG_99_baker.pdf

You are the very first to comment on this BEFORE I sited it, Lol; http://www.finehomebuilding.com/PDF/Free/021105092.pdf

Gary
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Old 12-06-2011, 08:14 AM   #18
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Ventilation (intake) questions with partial overhangs


Quote:
Originally Posted by Windows on Wash View Post
The more you get it tightened up on the attic to living space connection, the more your ventilation requirements drop.

If you are good in your air sealing details, there is no reason you can run very near the 1:300 ratio and at that point you will far exceed your requirements with the retrofit of what you have now.
Good stuff- the frosty windows I noticed when I first moved in. I did alot of the sealing this past year, so we'll see if the effort paid off come this winter time.

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Originally Posted by GBR in WA View Post
Pull up those planks to try and seal the stud walls next to the lowered stairwell. (F.g. in plastic bags) The basement/crawl is probably wired/plumbed giving you a good air chase there. Be careful, we don't want you posting in "Drywall" next....

I agree, the circular vents are quite deceptive for their NFVA; http://www.lomanco.com/ProductPAGES/CirkVents.html

Did you air seal the basement/crawl space, to counter the "stack effect"? http://www.wag-aic.org/1999/WAG_99_baker.pdf

You are the very first to comment on this BEFORE I sited it, Lol; http://www.finehomebuilding.com/PDF/Free/021105092.pdf

Gary
I can't get down into the cavity you see, even if I took the planks out (which were just sitting there) I can't lower myself into there as it's right above the basement stairs. What I did though, was I sealed the area as best as I could using 2 layers of 6 mil plastic sheeting and then stapled/siliconed the heck out of it. That should "hopefully" stop a good amount of the air flow.

As for drywalling, I've got pretty dang good at that . My first major project when I moved in I knocked down 2 walls to combine the foyer, dining room and living room into one 24 x 12" room. The textures of the walls and ceiling did not match so not only did I fill in the walls (and floor and ceiling) I also skim coated the entire living room! That took for-ever, esp the ceiling and was realllly messy but it came out surprisingly well esp for my first time

I forgot to mention the bath exhaust does vent to the outside. The house had quite a few big "chimneys" before I got to it, the stairs you saw earlier, the furnace chimney was open straight into the attic as were the 2 vent stacks. I sealed them all up. Exterior walls don't have any insulation though

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