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NC-2009 EAp2:Minimum Energy Performance

Demand Control Ventilation

Further, to the preliminary review of EAp2 our project team got a comment with regard to demand control ventilation (DCV). however, although the project includes spaces larger than 500 sf, none of those ha a design occupancy of greater than 40 people per 1.000 sf of floor area. Would a notification of the occupancy not exceeding 40 people/1,000 sf be sufficient to justify why DCV is not required to our project? Thank you in advance.

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Fri, 09/26/2014 - 13:59

That would be a start. It is always a good idea to back up your claims, statements and notifications with documentation. In this case you could point to the calculations for IEQp1. Make sure that you are not contradicting yourself in documentation submitted for another credit. Projects usually get this comment when they show a space as having 40 people per 1000 in the documentation for IEQp1 or if there is a large gathering space in the project like an auditorium where this density is likely at peak ventilation requirements.

Sat, 09/27/2014 - 17:13

Thank you Marcus. We are not contradicting ourselves with IEQp1 since no space exceeds the threshold (40pax/1,000sf). Although there is an auditorium in the project, occupancy will be still lower than 40pax/1,000sf. However, although DCV is not required (based on not exceeding the occupancy threshold) all large areas (>500sf) of our project are equipped with carbon dioxide sensors allowing for demand control ventilation.
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Sat, 09/27/2014 - 17:18

Perhaps the reviewer saw the auditorium and this is why they raised the question. State that the auditorium is under 40/1000 and provide the max occupancy and total square footage for that (and any similar) spaces in your response.

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