According to IEQc1, I am to complete table IEQc1-2 for all systems where 20% or more of the design supply airflow serves non-densely-occupied spaces. In my specific circumstance, I have 5 systems each with multiple zones. I have both densely and non-densely occupied zones with all but one system, and all 5 systems meet the 20% requirement.
My question is this: Do I need a line item for each non-densely populated zone in the table? i.e. RTU-1 will appear for 5 zones? Then would I do the same for RTU-2, etc?
Or can I create one line item for each system and simply list the entire outside air intake of that unit?
The reason I ask is because we are monitoring the outdoor air intake at each roof top unit, and not at each individual fan-powered supply box. We have also used the MZ calculation to size our roof top units, so it's not simple to determine our design outdoor air intake flow for each individual zone.
Helena Larsson
Sustainable Project ManagerSkanska Sweden
5 thumbs up
December 21, 2012 - 3:54 am
Hi Thomas,
In the IEQc1 forms that I have filled in it has been important that the IEQc1-2 table (non-densely occupied space) is demonstrated in correspondence with the IEQp1 form zoning. If you have filled in each floor etc or each space individually in IEQp1 then I would most likely do the same in IEQc1-2. However, I know others have filled in this table not being as specific and still been eligble for credit compliance I.e. AHU1 floor 1, AHU1 floor 2 and so on. It would be interesting to see what your outcome is once you decide what to do so post it on here if possible. Personally I have chosen to fill in each AHU system and each zone individually and then taken the OA values directly from the IEQp1 form where they are generated automatically. You should be able to see a generated OA flow for each zone in the 62MZ calc as well.
Good luck and happy holidays!