We have a residential building with common corridors. We are supplying corridor pressurization through the corridor and the intent is to have make-up air supplied to suites through door leakage. If we weather strip doors but do not install door sweeps on the doors, how does this affect this credit, if at all?
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Ben Stanley
Senior Sustainability ManagerWSP - Built Ecology
LEEDuser Expert
250 thumbs up
May 12, 2010 - 3:05 pm
The reference guide has a footnote related to this situation that I think provides your answer. On page 416 of the D&C reference guide, footnote 1 states that If the common hallways are pressurized with respect to the residential units then doors in the residential units leading to the common hallways need not be weather stripped provided that the positive differential pressure is demonstrated as in Case 1, Option 2 of the prerequisite." Case 1, Option 2 states that the building must "operate exhaust sufficient to create a negative pressure differential with the surrounding spaces of at least an average of 5 Pascals (Pa) (0.02 inches of water gauge) and a minimum of 1 Pa (0.004 inches of water gauge) when the doors to the smoking room (residential unit in our case) are closed."
Alex Wong
20 thumbs up
May 12, 2010 - 3:09 pm
Thanks for the reply Ben!
My question now is how can we prove that the pressure differential is at least 5 Pascals prior to construction? I realize 5 Pascals is not a huge differential but still hard to prove until the pressure test are in complete.
Ben Stanley
Senior Sustainability ManagerWSP - Built Ecology
LEEDuser Expert
250 thumbs up
May 14, 2010 - 10:34 am
Good question. I think you should defer submission of the prerequisite until the construction submission. This would be required anyway if you need to demonstrate acceptable sealing of residential units through blower door testing.
Jean Marais
b.i.g. Bechtold DesignBuilder Expert832 thumbs up
August 14, 2010 - 6:43 am
does anyone have an example calculation on this?