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Washington DC

Climate Zone 4

Annual heating and cooling costs

(Estimated)

Typical New House $2,053
ZIP System® House $1,866

Annual Savings $187

Zip System Wall Savings

% Savings
9%

Based on the following average utility prices:
Electricity: 0.1321 $/kWh Gas: 13.98 $/mcf

Estimation Assumptions:

General conditions for the energy simulation followed the 2006 International Energy Conservation Code (IECC). Simulations performed with REM/Rate v12.85. Air infiltration levels for reference house were 7 ACH@50 Pa and 4.5 ACH@50 Pa for the ZIP System house. Insulation levels for the reference and ZIP System homes were assigned in accordance with the 2006 IECC. For all homes, heating is natural gas with 80% AFUE and cooling is central air 13 SEER. Window areas are assigned at 18% of conditioned floor area and efficiencies according to 2006 IECC. No mechanical ventilation was used. Utility prices are the 2009 state averages obtained from the Energy Information Administration. Actual savings will vary. Savings estimates are based on comparison to an average new U.S. home with 7 ACH. ZIP System home value of 4.5 ACH based on field observations.

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