EAc10: Space Heating and Cooling Equipment

(1-4 points)

Intent

To reduce energy consumption associated with the heating and cooling system.

Requirements

Design and install HVAC equipment that is more efficient than the equipment required by the ENERGY STAR for Homes, version 3, prescriptive pathway. Points are awarded according to Table 1.

Any piping designed as part of a heat pump system to carry water that is well above (or below) the thermostatic temperature settings in the home must have R-4 or better insulation. Refrigerant piping must be insulated to R-6 or better on the air-conditioning mode suction line or the heat-pump mode discharge line.

Table 1. Points for HVAC equipment that exceeds Energy Star requirements

Climate zones 4–8
	Central AC, air source heat pump	Gas furnace	Boiler, oil furnace (gas, oil, diesel, propane)	Ground-source heat pump			Points
				Open loop	Closed loop	Direct expansion
Cooling	≥ 14 SEER			≥ 17.8 EER	≥ 15.5 EER	≥ 16.5 EER	1
Heating	≥ 10 HSPF	≥ 92 AFUE	≥ 87 AFUE	≥ 4.0 COP	≥ 3.6 COP	≥ 3.9 COP	1
Cooling	≥ 15 SEER			≥ 19.4 EER	≥ 17 EER	≥ 18 EER	2
Heating	≥ 10.5 HSPF	≥ 94 AFUE	≥ 90 AFUE	≥ 4.3 COP	≥ 4.0 COP	≥ 4.2 COP	2
Climate zones 1–3
	Central AC, air source heat pump	Gas furnace	Boiler, oil furnace (gas, oil, diesel, propane)	Ground-source heat pump			Points
				Open loop	Closed loop	Direct expansion
Cooling	≥ 15.5 SEER			≥ 17.8 EER	≥ 15.5 EER	≥ 16.5 EER	1
Heating	≥ 8.6 HSPF	≥ 90 AFUE	≥ 85 AFUE	≥ 4.0 COP	≥ 3.6 COP	≥ 3.9 COP	1
Cooling	≥ 16.5 SEER			≥ 19.4 EER	≥ 17 EER	≥ 18 EER	2
Heating	≥ 9.0 HSPF	≥ 92 AFUE	≥ 87 AFUE	≥ 4.3 COP	≥ 4.0 COP	≥ 4.2 COP	2

AC = air-conditioning
AFUE = annual fuel utilization efficiency
COP = coefficient of performance
EER = energy efficiency ratio
HSPF = heating seasonal performance factor
SEER = seasonal energy efficiency ratio

Credit only available for projects using the EA prescriptive path’

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