I’m modeling for a project under LEED CS v4 according to ASHRAE 90.1-2010.
I know that unmet hours shall not exceed 300 .
In LEED 2009 in accordance to ASHRAE 90.1-2007 the Unmet load hours for the Proposed Design shall not differ from unmet load hours for the Baseline Building Design by more than 50 hours.
It is not so clear if now in the new version v4 this rate is canceled and if it is mandatory that the unmet load hours for the Proposed Design shall not exceed the unmet load hours for the Baseline building.
Could you help me?
LEED AP BD+C