COP and EER. Output over electrical input, dimensionless or in Btu/h per watt (EER is 3.412 × COP); SEER and SCOP weight a season, which a year's simulation measures instead.
The coefficient of performance is the cooling — or heating — a machine delivers divided by the electricity it draws, in the same units, so a chiller delivering 300 kW for 60 kW of power has a COP of 5. EER is the same ratio with the cooling in Btu/h and the power in watts, which makes it 3.412 times the COP. A compressor map's COP counts only the compressor; a unit's COP adds the fans and pumps that run with it, which is why a packaged rooftop reads lower than the scroll inside it. Both are figures at one condition, and the condition must be stated: AHRI rates air conditioners at 35 °C outdoors.
SEER, SCOP and IEER weight several part-load conditions to estimate a season, on the assumption of a standard load profile and climate. An hourly simulation against the building's own weather year measures the seasonal figure directly, machine by machine, with the cycling and the fan energy in it — which is where the standard ratings and the building disagree. The thermodynamic ceiling is Carnot's: COP cannot exceed the cold temperature over the temperature lift, in kelvin, and real machines reach 40 to 60 % of it; this solver flags a compressor map claiming more than 80 % as a polynomial read outside its envelope.
Open the builder — the examples in the Design tab's sources list include a machine of this kind, and the Simulate tab runs it against a year of weather.
DOAS — dedicated outside-air system · SZVAV — single-zone variable air volume · VAV terminal box · Economiser · Waterside economiser · Demand-controlled ventilation · Face-and-bypass · Head-pressure control · Humidity ceiling and floor · Cycling and modulation · Coupling · Priority · Category · Nested system · Design point and TMY year · Superheat · Subcooling · Sensible heat ratio (SHR) · Bypass factor · Wet-bulb temperature · Dew point · Compressor map · Evaporating and condensing temperature · Range and approach · Heat-recovery (three-pipe) VRF · Typical meteorological year (TMY)