In our proposed building we have CAV ventilation system which at night (when there's noone in the building) will provide 50% of the designe airflow rates. That's why for the simulation purposes in the model we marked that airflow control is "scheduled" (100% during the day, 50% at night). I would like to ask how in this case reference ventilation system should be modeled? Our reference building system is VAV (7). What should be the airflow control in the reference VAV system: proportional, constant or scheduled like in the proposed building?
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
November 25, 2013 - 11:33 am
Your project must comply with all of Section 6.4.3 since it is a mandatory provision. Based on your description your proposed system does not comply with a few of the provisions in this section. The baseline is modeled identically.
Agnieszka Rylska
GO4IT SP Z OO SP K30 thumbs up
December 10, 2013 - 6:57 am
Thank you Marcus.
I have one more question regarding Section G3.1.2.10 "Exhaust Air Energy Recovery" – it is not clear to me when should we include energy recovery equipment in the baseline model. The section states that “Individual fan systems that have both a design supply air capacity of 2400L/s or greater and have a minimum outdoor air supply of 70% or greater of the design supply air quantity shall have an energy recovery system […]”. My question is: should we compare these guidelines to our proposed or baseline model? Do we have to include energy recovery system in the reference model if there is a minimum air supply of 70% in the baseline model or if there is a minimum air supply of 70% in the proposed model?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
December 10, 2013 - 11:40 am
The baseline.