Forum discussion
NC-2009 IEQp1: Minimum IAQ Performance
Hello,
I am working on a residential building, the venilation system consists of 4 AHUs that supply air to corridors. The corridors are pressurized and therefore push the fresh air through grills in the ceiling to the apartments. There is no ducting between the corridors and the apartments. Therefore the air transfers through the plenum basically. There is sufficient air flow, but would the system be approved by USGBC ?
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Andrew Mitchell, P.E.
PrincipalMitchell Gulledge Engineering, Inc.
LEEDuser Expert
126 thumbs up
June 10, 2014 - 8:35 am
I have worked on a similar design. The only way that I could be sure to get approval was to have an exhaust fan that draws the ventilation air into the living spaces. You have to use a ventilation effectiveness of 0.5. If you are simply counting on a pressurized corridor leaking ventilation air into each space at a uniform rate, it will probably not be approved by the LEED reviewer.
Malek Abualhaj
1 thumbs up
June 10, 2014 - 8:59 am
Thanks Andrew for the reply. Originally, we submitted a CIR with this system asking if it is going to be feasible, and the USGBC replied it would be approved. However, in our CIR we added that there will be transfer ducts between the corridor and the apartment, but the project cannot include those ducts due to the fire system in the building. We are trying to find a different approach to solve the issue. Natural ventilation did not work either (small windows).
Ruben Porter
May 22, 2015 - 3:49 pm
Were you able to solve your issue?
Judhajit Chakraborty
Building Performance SpecialistWSP Built Ecology
2 thumbs up
January 28, 2016 - 1:06 pm
I have a similar case, only difference is, instead of plenum, we are depending on door undercuts and pressure created by bathroom exhaust and dryer exhaust. Please let me know if you were able to resolve your issue. Thanks.