My proposed system is a WSHP. However, the heat from electric exceeds the heat used from boiler in the WSHP loop.
I would condiser the primary heating source in this building to be electric, and the correct Baseline System to be System 6 - Packaged VAV with PFP Boxes, Direct Exansion Cooling and Electric Resistance Heat (Table G3.1A page 180, ASHRAE Standard 90.1-2007.
The building is 120,000 sqft and 4 floors.
Is that correct? Do you agee with the selection.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5899 thumbs up
August 26, 2011 - 2:54 pm
Hybrid systems get modeled under the fossil fuel column so it is likely a system 5 for the baseline.
John Harrington
23 thumbs up
August 26, 2011 - 4:45 pm
Hi Marcus, There is a note at the bottom of Table G3.1.A page 180 of the 90.1-2007 Standard that states. "Where attributes make a building eligible for more then one heating type, use the predominate condition to determine the system type for the entire building.
The building does use more electric energy to heat then natural gas energy. I was going to use this as my bases for choosing System 6. What do you think?