DOE Net Zero Energy Ready Home

The DOE Net Zero Energy Ready Home is identical to the IECC 2012 home with a few additional energy saving features:

Air Infiltration

Net Zero Energy Homes has certain maximum infiltration requirements whereas IECC 2012 does not. The following \(ACH_{50}\) values are converted to to \(CFM_{50}\) and entered as the blower door test reading:

IECC Zone \(ACH_{50}\)
1-2 3
3-4 2.5
5-7 2
8 1.5

Windows

The window U-value and SHGC inputs are better than IECC 2012 and can be described as follows:

IECC Zone U-value SHGC
1-2 0.4 0.25
3 and 4 except marine 0.3 0.25
4 marine - 8 0.27 0.7

Heating and Cooling Equipment

  Natural Gas Electric
IECC Zone Heating - Furnace Cooling - Central Air Heating - Heat Pump Cooling - Heat Pump
1-2 80 AFUE 18 SEER 8.2 HSPF 18 SEER
3 and 4 except marine 90 AFUE 15 SEER 9.0 HSPF 15 SEER
4 marine - 8 94 AFUE 13 SEER 10.0 HSPF 13 SEER

Domestic Hot Water

Fuel Type Water Heater Type Energy Factor
Natural Gas Gas Storage Tank 0.67
Electric Heat Pump Water Heater 2.0