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Design Energy Code Equivalents

Design Energy Code

Approximate % Reduction from Average

ASHRAE 90.1-1999

10%

ASHRAE 90.1-2001

10%

ASHRAE 90.1-2004

25%

ASHRAE 90.1-2007

31%

ASHRAE 90.1-2010

42%

ASHRAE 90.1-2013

46%

ASHRAE 90.1-2016

50%

ASHRAE 90.1-201952%
ASHRAE 189.1-202055%

California Title 24 2005 for high rise residential

35%

California Title 24 2005 for single family residential

30%

California Title 24 2008

40%

California Title 24 2010

40%

California Title 24 2013

48%

California Title 24 2016

53%

California Title 24 201959%

California Title 24 Non Residential 2008

40%

California Title 24 Residential 2005

35%

California Title 24 Residential 2008

40%

IECC 2003

10%

IECC 2006

20%

IECC 2009

31%

IECC 2012

42%

IECC 2015

46%

IECC 201849%
IECC 202152%

*NECB 2011

45%

*NECB 2015

51%

*NECB 201755%
New York Stretch Code 201857%

Older than 1999

0%

Massachusetts Stretch Code

52%

Oregon Energy Code

25%

Oregon Energy Code 2010

34%

Oregon Energy Code 2014

40%

Oregon Energy Efficiency Specialty Code 2010

25%

Oregon Energy Efficiency Specialty Code 2014

40%

Washington Energy Code

25%

Washington Energy Code 2012

25%

Washington Energy Code 2015

48%

Note: These are estimates of code comparison based on analyses by Pacific Northwest National Laboratory, New Buildings Institute, and Architecture 2030. These percentages are provided to enable the inclusion of non-modeled projects in analysis for the AIA 2030 Commitment.

*Source for this code is from the National Research Council Canada.



Design Energy Code Equivalents
SectorCodezEPI% better than CBECSMethodologyData SourceLink
CommercialOlder than 1999
0%Defined as baseline

ResidentialOlder than 1999
0%Defined as baseline

Commercial90.1-19998416%DOE/PNNL percent savings improvement over previous codeDOE Code Improvement Estimate Dashboard

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Commercial90.1-20018416%DOE/PNNL percent savings improvement over previous codeDOE Code Improvement Estimate Dashboard

Click here


Commercial90.1-20047525%Set at 25% improvement or zEPI 75DOE Code Improvement Estimate Dashboard

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Commercial90.1-20077228%DOE/PNNL percent savings improvement over previous codeDOE Code Improvement Estimate DashboardClick here
Commercial90.1-20105842%DOE/PNNL percent savings improvement over previous codeDOE Code Improvement Estimate Dashboard

Click here

Commercial90.1-20135446%DOE/PNNL percent savings improvement over previous codeDOE Code Improvement Estimate DashboardClick here
Commercial90.1-20165050%DOE/PNNL percent savings improvement over previous codeDOE Code Improvement Estimate DashboardClick here
Commercial90.1-20194852%DOE/PNNL percent savings improvement over previous codeDOE Code Improvement Estimate DashboardClick here
Residential2003 IECC7822%DOE/PNNL percent savings improvement over previous codeDOE Code Improvement Estimate DashboardClick here
Residential2006 IECC7525%Set at 25% improvement or zEPI 75DOE Code Improvement Estimate DashboardClick here
Residential2009 IECC6931%DOE/PNNL percent savings improvement over previous codeDOE Code Improvement Estimate DashboardClick here
Residential2012 IECC5644%DOE/PNNL percent savings improvement over previous codeDOE Code Improvement Estimate DashboardClick here
Residential2015 IECC5644%DOE/PNNL percent savings improvement over previous codeDOE Code Improvement Estimate DashboardClick here
Residential2018 IECC5545%DOE/PNNL percent savings improvement over previous codeDOE Code Improvement Estimate DashboardClick here
Residential2021 IECC5050%DOE/PNNL percent savings improvement over previous codeDOE Code Improvement Estimate DashboardClick here

NECB 2011
45%Using AIA values - don't have analysis availablePage 39Click here

NECB 2015
51%Using AIA values - don't have analysis available


NECB 2017
55%Using AIA values - don't have analysis available
Click here
CommercialOregon 20214951%Site Energy Index per PNNL AnalysisCommercial dashboardClick here
ResidentialOregon 20215644%Site Energy Index per PNNL AnalysisResidential Dashboard
CommercialWashington 20214852%


ResidentialWashington 20215149%2021 IECC Energy Index for WA. State code would likely be higherPNNL State-level results spreadsheets
https://www.energycodes.gov/state-portal
Click here
CommercialCalifornia Title 24 20195050%90.1-2019 Energy Index for CA. T24 would likely be higherPNNL State-level results spreadsheets
https://www.energycodes.gov/state-portal
Click here
ResidentialCalifornia Title 24 20165348%2021 IECC Energy Index for CA. T24 would likely be higherPNNL State-level results spreadsheets
https://www.energycodes.gov/state-portal
Click here
CommercialNYStretch 20184852%Percent energy savings over 90.1-2013PNNL/NBI Determination Analysis
https://www.pnnl.gov/main/publications/external/technical_reports/PNNL-ACT-10073.pdf
Click here
CommercialMassachusetts Stretch Code 20174555%Ten percent improvement over base code energy indexBase code Energy Index per PNNL Analysis
https://www.energycodes.gov/state-portal
Click here
CommercialMassachusetts Stretch Code 20204258%Ten percent improvement over base code energy indexBase code Energy Index per PNNL Analysis
https://www.energycodes.gov/state-portal
Click here
CommercialASHRAE 189.1-20204654%5% better than 90.1-2019 - From targeted 5% improvement in Building Performance Factors (BPF)ASHRAE Standard 189.1 Text