I have a new office building where all space heating is designed to be electric heat pumps with supplemental electric resistance, including the outdoor air makup units using heat pumps. The project is a large office, >150,000 sf, and I believe my baseline system type would System Type 8, VAV with PFP Boxes. On the project, I do have domestic hot water and a kitchen using gas, as well as a process-hot water system for snow melt. Would any of these gas systems impact the baseline heating fuel type?
We are planning for kitchen space heating MAU to have electric heat to try and maintain our electric baseline. Any prior experience in this area would be greatly appreciated.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
June 19, 2020 - 9:53 am
You should apply the exceptions to G3.1.1 to the kitchen if applicable, then take the remianing area of the building and reenter Table G3.1.1A
RDK E&S
Energy Engineer / Sustainability SpecialistNV5
15 thumbs up
July 1, 2020 - 5:17 pm
We have a similar situation: we have a 6 story mixed use building (1st floor 13,000 sf retail, 5 floors residental at 15,000 sf/floor) with an additional 2 below grade parking levels. The building has electric only heating except for 2 amenity space rooms (served by decorative gas fireplaces) and a hot water boiler for snow melt. Would the following be a correct Baseline configuration: (1) System 10 to serve the 2 parking levels per G3.1.1e, (1) System 4 PSZ-HP to serve retail floor (including amenity spaces) per G3.1.1b, and PTHP for each dwelling unit and corridor included in the residental floors? Or would the mixed use floors be served by PSZ-AC? Unsure of how to interpret the Baseline heating source as the building is electric heating only (except for 2 decorative fireplaces in amenity rooms and process loads for snow melt). Thank you~
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
July 2, 2020 - 9:35 am
I assume the gas fireplaces are not the primary heat in those spaces so I would ignore them. Your baseline system configuration appears correct to me.