According to ASHRAE 90.1 (2007) Table G3.1 - 10 c, "where no heating systems exist, HVAC system shall be assumed to be electric". Considering a space that has a cooling system but not a heating system, can you please clarify:
1) which shall be the "virtual" heating set-point for these spaces?
2) in the particular situation of a factory where the space temperature is allowed to fluctuate down to 10ºC, can the "virtual" heating system be adjusted (because good thermal comfort levels are not expected)?
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5868 thumbs up
April 17, 2015 - 9:45 am
Adding systems that do not exist in the design is required for both heating and cooling. The easy work around is to set the temperature in the space so that the system never comes on. As long as you have the same temperature in both models this is allowed. So adding a system that does not exist is just a waste of time. What I do is tell the reviewer that I am aware of this work around and therefore did not go to the effort required to model the system. The end result is the same so the reviewer should accept it.