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NC-v4 EAp2:Minimum energy performance

Demand Controlled Ventilation

Greetings,

There is a question regarding the requirements related to DCV – 6.4.3.8 and specifically Exception 4. – “Spaces where >75% of the space design OA is required for makeup air…”.

The question is: If we have a 100% OA situation, or DOA (Dedicated Outdoor Air) unit, do such cases belong to this exception and therefore providing DCV conditions are not required.

Your comments are highly appreciated.

Thanks.

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Waleed AlGhamdi
Sustainability Enabler
Eskew+Dumez+Ripple
LEEDuser Basic Member
20 thumbs up

Thu, 04/02/2020 - 14:26

Depends if the air is make-up air or not. If it's a typical DOAS providing ventilation air to zone that have local temperature control, then most likely not. The exception mostly applies to spaces like commercial kitchens and labs etc.

Thu, 04/02/2020 - 14:31

I am not a native English speaker, but make-up air should be air that is supplied into the room in order to reduce the air depression (and uncontrolled air infiltration) due to a hood (tipically in kitchens or labs, as Waleed said). 

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