ASHRAE 90.1 minimum efficiency for unitary / packaged equipment is most commonly specified at standard rating points using which “seasonal/integrated” metrics for part-load operation (vintage 2010+ in many U.S. paths)?

Choices

• (A) COP of pumps only
• (B) GPM/ton of tower only
• (C) Static regain method only
• (D) IEER or SEER (air-cooled) or IPLV/IPLV-style integrated ratings per tables