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Residential Prototype Building Models 2024 IECC - Climate Zone 7

Document Type: Model Data
Publication Date:

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the recent versions of the IECC are available for each climate.

Residential Prototype Building Models 2024 IECC - Climate Zone 8

Document Type: Model Data
Publication Date:

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the recent versions of the IECC are available for each climate.

Energy Savings Analysis: 2024 IECC for Residential Buildings

Document Number: DOE/EE-2960
Document Type: Analysis, Determination, Technical Support Document
Publication Date:

Section 304(a) of the Energy Conservation and Production Act, as amended, directs the U.S. Secretary of Energy to review the International Energy Conservation Code (IECC)1 and make a determination as to whether updated editions would improve energy efficiency in residential buildings. The IECC is developed by the International Code Council (ICC) through an established industry review and consensus process with updated editions typically published every 3 years. The U.S. Department of Energy (DOE) reviews the energy saving impacts of updated code editions and publishes its findings in the Federal Register. The DOE determination and accompanying technical analysis serve as useful guidance to state and local governments as they review and update their building codes. 

The most recent edition, the 2024 IECC, was published in August 2024, triggering the DOE review and determination process.2 DOE and Pacific Northwest National Laboratory (PNNL) conducted a technical analysis to determine energy savings for the 2024 IECC (ICC 2024) residential provisions relative to the previous edition, the 2021 IECC (ICC 2021). This report documents the methodology used to conduct the analysis and summarizes the results. 

The Nexus of Building Energy Codes and Resilience

Document Type: Reports and Studies, Resource Guide
Publication Date:

Green Building Workforce Webinar 11.21.24 - Full Presentation

Document Type: Presentation Slides
Publication Date:

Residential Cost Effectiveness Methodology 2024

Document Type: Cost-effectiveness
Publication Date:

This document is an update to the Department of Energy’s (DOE) cost-effectiveness methodology originally published in August 2015. Changes include correction of a typographical error in lifecycle costing equations and building prototype enhancements; updating the weighting factors for foundation types and system types based on permit data from the U.S. Census and current housing starts data from the U.S. Census and Residential Energy Consumption Survey (RECS), updated representative climate locations for both national and state level aggregations, adding a section on data for measure lifetimes, and the addition of the determination strategy for compiling first costs of measures and economic parameters.

Commercial Cost Effective Methodology 2024

Document Type: Cost-effectiveness
Publication Date:

This document lays out the Department of Energy’s (DOE’s) methodology for evaluating the cost-effectiveness of energy code and standard1 proposals and editions. The evaluation is applied to new provisions or editions of ANSI/ASHRAE/IES2 Standard 90.1 and the International Energy Conservation Code. The methodology follows standard lifecycle cost (LCC) economic analysis procedures. 

BECP Embodied Carbon Webinar Presentation 10-17-24

Document Type: Presentation Slides
Publication Date:

Complete Single-Family Residential Field Study Toolkit (ZIP file)

Document Type: Field Study, Single-Family Residential
Publication Date:

This file contains all of the Sample Kickoff and Recruitment Materials, as well as the checklists, templates and guides. 

NOTE: All files included in this zip file are also available for download individually. 

Single-Family Residential Field Study Sample Recruitment Materials (ZIP file)

Document Type: Field Study, Single-Family Residential, Recruitment Materials
Publication Date:

Sample Recruitment Materials include:

  • Alabama Sample FOIA Request
  • Georgia Field Study Representative Badge Sample
  • Alabama Phone Script (Builders)
  • Alabama Phone Script (Jurisdictions)
  • Pennsylvania Phone Script (Builders)
  • Sample Kentucky Press Release
  • Sample Digital Ads
  • Sample Idaho Email Text (Code Officials)
  • Recruitment Flyers for Iowa, New Mexico, and South Carolina
  • Recruitment Letters to Code Officials, Builders and/or Jursidictions for Alabama, Kentucky, and Pennsylvania
  • South Carolina Recruitment Rack Card
  • Colorado and Nevada Request for Proposals for Field Data Collection Services
  • Kentucky Request for Proposals for Residential Energy Code Compliance Evaluation

NOTE: These files are also available for download individually. 

Single-Family Residential Field Study Sample Kickoff Materials (ZIP file)

Document Type: Field Study, Single-Family Residential, Kickoff Materials
Publication Date:

Sample Kickoff Materials include Kickoff Meeting Presentations for Alabama, Arizona, Idaho TAG, Idaho, Iowa,  and Utah. A Stakeholder Kickoff Draft Agenda for Alabama is also included.

NOTE: These files are also available for download individually. 

Residential Field Study Photo Documentation

Document Type: Checklist, Field Study, Single-Family Residential
Publication Date:

This document contains checklists of items to photograph while onsite to help answer questions that may arise regarding the accuracy of entries in the data collection form. Questions may be raised during quality assurance reviews by the project team and PNNL. For each piece of data entered, it is a best practice to have photo-documentation to facilitate future validation of that value. Photographs are also extremely useful for subsequent training programs, field guides, and educational documents.

Kickoff Meeting Presentation Template

Document Type: Field Study, Single-Family Residential, Template
Publication Date:

This PowerPoint is intended to be adapted by project teams to fit their needs and the needs of their stakeholders. The slide theme and other features may be changed to suit the presenting organization.

Field Study Data Quality Assurance for Project Teams

Document Number: PNNL-SA-198369
Document Type: Checklist, Field Study, Single-Family Residential
Publication Date:

Field study project teams are required to perform quality assurance (QA) on the data they collect prior to sending it to PNNL for additional QA and analysis. This document provides a list of QA checks that project teams should perform.

Supplemental Data Sources for Home Population Generation and Recruitment

Document Number: PNNL-SA-188473
Document Type: Field Study, Single-Family Residential
Publication Date:

The primary method for creating a population of homes from which to derive a random sample, as explained in the methodology, is to contact sample jurisdictions to obtain lists of homes. These lists are then sorted randomly to fulfill the sample. While this method has had success, it is not always possible to obtain a list of permits from a jurisdiction. In addition, even when permit data is available directly through a jurisdiction, it can be difficult to ascertain information on the construction status of sample homes. Knowing the phase of construction can be used to inform the timing of site visits to improve data collection efficiency.

For these reasons, alternative or supplemental methods of creating a home population for random sampling may be necessary. Alternative methods that may be used to build a list of recently permitted homes include target searches using jurisdictional inspection schedules, online real estate services, and general internet searches. The same alternative sources of data used to generate the population of homes may also help in scheduling site visits to arrive during phases of construction that maximize the number of observations per site visit.

End-use data results - IECC-Residential 2024

Document Type: Analysis
Publication Date:

This spreadsheet contains detailed end-use data results from the Determination Analysis of IECC-Residential 2024 conducted by Pacific Northwest National Laboratory.

2024 IECC BECP Webinar Presentation - 9.19.24

Document Type: Presentation Slides
Publication Date:

Efficient, Affordable, Resilient Buildings

Document Type: Fact Sheets
Publication Date:

States, territories, tribal governments, and local governments, with the support of partnering organizations, have a unique opportunity to leverage significant federal funding to support improvements to new and existing buildings in jurisdictions across the country. The Department of Energy (DOE) launched two related grant programs that government entities with the authority to adopt building energy codes, and their partner organizations, can access in support of the adoption, implementation, and enforcement of building energy codes.

Refrigerants and Codes Webinar Presentation 8.15.24

Document Type: Presentation Slides
Publication Date:

90.1 Appendix G PBM - All Buildings - ASHRAE 90.1-2022 Proposed

Document Type: Model Data
Publication Date:

These prototypes are used to calculate Building Performance Factors (BPFs) for use with the Performance Rating Method of ASHRAE Standard 90.1-2016 though 2022. These prototypes are used to implement the new approach to calculating BPFs that follow the Appendix G baseline rules and include adjustments to the prototype models made after a specific code has been published. Those BPFs are therefore different than those published in ASHRAE Standard 90.1 2016-2022. This new approach is discussed in more detail in the PNNL Technical Support Document titled, Commercial Building Prototypes Based on ANSI/ASHRAE/IES Standard 90.1-2019 Appendix G PRM.

90.1 Appendix G PBM - All Buildings - ASHRAE 90.1-2022 Baseline

Document Type: Model Data
Publication Date:

These prototypes are used to calculate Building Performance Factors (BPFs) for use with the Performance Rating Method of ASHRAE Standard 90.1-2016 though 2022. These prototypes are used to implement the new approach to calculating BPFs that follow the Appendix G baseline rules and include adjustments to the prototype models made after a specific code has been published. Those BPFs are therefore different than those published in ASHRAE Standard 90.1 2016-2022. This new approach is discussed in more detail in the PNNL Technical Support Document titled, Commercial Building Prototypes Based on ANSI/ASHRAE/IES Standard 90.1-2019 Appendix G PRM.

90.1 Appendix G PBM - All Buildings - ASHRAE 90.1-2019 Proposed

Document Type: Model Data
Publication Date:

These prototypes are used to calculate Building Performance Factors (BPFs) for use with the Performance Rating Method of ASHRAE Standard 90.1-2016 though 2022. These prototypes are used to implement the new approach to calculating BPFs that follow the Appendix G baseline rules and include adjustments to the prototype models made after a specific code has been published. Those BPFs are therefore different than those published in ASHRAE Standard 90.1 2016-2022. This new approach is discussed in more detail in the PNNL Technical Support Document titled, Commercial Building Prototypes Based on ANSI/ASHRAE/IES Standard 90.1-2019 Appendix G PRM.

90.1 Appendix G PBM - All Buildings - ASHRAE 90.1-2016 Proposed

Document Type: Model Data
Publication Date:

These prototypes are used to calculate Building Performance Factors (BPFs) for use with the Performance Rating Method of ASHRAE Standard 90.1-2016 though 2022. These prototypes are used to implement the new approach to calculating BPFs that follow the Appendix G baseline rules and include adjustments to the prototype models made after a specific code has been published. Those BPFs are therefore different than those published in ASHRAE Standard 90.1 2016-2022. This new approach is discussed in more detail in the PNNL Technical Support Document titled, Commercial Building Prototypes Based on ANSI/ASHRAE/IES Standard 90.1-2019 Appendix G PRM.

90.1 Appendix G PBM - All Buildings - Complete Set

Document Type: Model Data
Publication Date:

These prototypes are used to calculate Building Performance Factors (BPFs) for use with the Performance Rating Method of ASHRAE Standard 90.1-2016 though 2022. These prototypes are used to implement the new approach to calculating BPFs that follow the Appendix G baseline rules and include adjustments to the prototype models made after a specific code has been published. Those BPFs are therefore different than those published in ASHRAE Standard 90.1 2016-2022. This new approach is discussed in more detail in the PNNL Technical Support Document titled, Commercial Building Prototypes Based on ANSI/ASHRAE/IES Standard 90.1-2019 Appendix G PRM.

90.1 Appendix G PBM - ApartmentHighRise - ASHRAE 90.1-2022 Proposed

Document Type: Model Data
Publication Date:

These prototypes are used to calculate Building Performance Factors (BPFs) for use with the Performance Rating Method of ASHRAE Standard 90.1-2016 though 2022. These prototypes are used to implement the new approach to calculating BPFs that follow the Appendix G baseline rules and include adjustments to the prototype models made after a specific code has been published. Those BPFs are therefore different than those published in ASHRAE Standard 90.1 2016-2022. This new approach is discussed in more detail in the PNNL Technical Support Document titled, Commercial Building Prototypes Based on ANSI/ASHRAE/IES Standard 90.1-2019 Appendix G PRM.