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NC-v4 EAp2:Minimum energy performance

occupancy sensor in big offices

I read in paragraph 9.4.1.2 b. that "an occupant sensor or a timer switch shall be installed (...) in: (...) 6. office spaces up to 76.2m2". Does it mean that for bigger offices (i.e. 100m2) no occupant sensor is needed? It sounds strange.

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

Thu, 07/20/2017 - 14:24

No. Keep reading. Larger office space would come under 9.4.1.2c.

Thu, 07/20/2017 - 14:44

"For spaces not included in 9.4.1.2b, each control device shall be activated either manually by an occupant or automatically by sensing an occupant". It seems that an automatic control that turns lighting off when the occupants are not present is not requested, is it?
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 07/20/2017 - 15:11

Yep no occupant sensor is required as manual control are allowed. In larger, open office areas this makes sense most of the time because those spaces are rarely unoccupied. Occupancy sensors can also be used for compliance. Whether they are needed or not also depends on the compliance path chosen for 9.4.1.1. Also note that plug in lighting may be affected by 8.4.2.

Thu, 07/20/2017 - 16:01

Thanks. TABLE G3.2 can be applied for big offices where occupancy sensors are installed, correct?
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 07/20/2017 - 16:08

Yes that gives you the LPD credit you can claim to demonstrate the energy savings associated with occupancy sensors.

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