For Case 1, Type 2, where at least 20% of the system serves non-densely occupied zones, we have a situation where (1) dedicated outside air system (DOAS) serves several smaller heat pump (HP) zones, by ducting the conditioned OA directly into the return ducts of the HP zones. Can we use just one outside air flow monitoring station in the DOAS system, or do we need an air flow monitoring station at each HP connection?
Reading thru the comments, it appears we can get away with just the (1) AFMS at the DOAS. However, the LEED form under Table IEQc2-1 that "System names and numbers must correspond with IEQp1". For credit IEQp1, we had to list all the individual HP zones, as some of the were single zone, and some were multi-zone. Can we just list the DOAS system under Table IEQc2-1, even though it doesn't correspond with IEQp1, which lists the individual HP units? If not how, are we supposed to deal with this?
Thank you,
Brightworks Sustainability
Brightworks Sustainability LLC47 thumbs up
July 18, 2016 - 5:24 pm
Hi Logan,
How did you end up pursuing this credit? I am looking for answers to the same question. Thanks
Logan Dorrell
Sr. Mechanical EngineerAECOM
3 thumbs up
January 5, 2017 - 4:41 pm
Hmmm... still looking for an answer on this. We are just now looking to submit on this credit. I was about to ask the same question and realized I had asked it months ago.
I'm considering just including the DOAS unit in the form and then adding a narrative listing all the attached zones and their minimum OA flows and explaining the situation, but not sure if they will accept this yet. I'll let you know if they accept it once we find out. Did you have any luck addressing this yet?
Thanks,
Elizabeth (Zeba) Floyd
Project DirectorSustainable Design Consulting LLC
LEEDuser Expert
14 thumbs up
October 17, 2017 - 4:10 pm
Logan: How did GBCI respond to your IEQc1 submission?
Thank you.
Andrew Mitchell, P.E.
PrincipalMitchell Gulledge Engineering, Inc.
LEEDuser Expert
126 thumbs up
October 17, 2017 - 4:52 pm
There was an official credit interpretation ruling that if you have a constant volume DOAS, you can simply provide fan status to achieve the credit. Look for it in the CIR Library for 2009v3.