The primary goal of this paper was to review existing energy code evaluation studies, and make recommendations for future work in this area. The secondary purpose is to address this existing body of literature as it relates to the quantification of the savings gap, defined as the energy savings foregone due to non-compliance with the energy code adopted in a state or local jurisdiction.
To receive updates about BECP publications subscribe to the BECP Mailing List.
Additional resources are also available from the Building America Solution Center.
Over the past several code cycles, mechanical ventilation requirements have been added to ensure adequate outside air is provided for ventilation whenever residences are occupied. These ventilation requirements can be found in the International Residential Code for homes and the International Mechanical Code for dwelling units in multifamily buildings.
The 2006 and 2009 International Energy Conservation Code require sizing calculations be performed on every home by referencing International Residential Code Section M1401.3. Section M1401.3 requires heating and cooling systems be sized to the Air Conditioning Contractors of America (ACCA) Manual J - Eighth Addition or other approved heating and cooling load calculations. The ACCA sizing methodology has sufficient built-in safety factors to accommodate most conditioning needs.
A study prepared for the Long Island Power Authority to analyze "new construction practices and market conditions from the summer and fall of 2003." The results of the study were used during the design of the Long Island Power Authority's New York ENERGY STAR Labeled Homes Program (NYESLHP).
This Quick Reference Guide will guide you, step-by-step, through a typical plan review process for energy code compliance and show how it can be conducted quickly and efficiently. The U.S. Department of Energy’s REScheck™ Compliance Software is designed to create simplified compliance certificates that can be easily reviewed by enforcement personnel.
A report conducted by the Southwest Energy Efficiency Project (SWEEP) that "reviews state and utility programs aimed at stimulating the construction of highly energy-efficient new homes in the states of Arizona, Colorado, Nevada, and Utah."
Energy-efficiency requirements were developed for manufactured homes, which are regulated by the U.S. Department of Housing and Urban Development (HUD). A life-cycle cost analysis from the homeowner's perspective was used to establish parameters for a least-cost home in a large number of cities. Economic, financial, and energy-efficiency measures for the life-cycle cost analysis were selected and documented. The resulting energy-efficiency levels were aggregated to zones that were expressed as a maximum overall home U-value (U0) requirement for the building envelope. The proposed revised standard's costs, benefits, and net value to the consumer were quantified. This analysis updates a similar effort completed in 1992, which was the basis for the existing HUD code U0 requirement. Updated U0s for manufactured homes are recommended.
In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this is to certify that the State of Rhode Island has adopted the Rhode Island Energy Conservation Code, which references ICC International Energy Conservation Code the 2012 version of the International Energy Conservation Code (IECC) for low-rise residential buildings, as well as ASHRAE Standard 90.1-2010 for nonresidential buildings. The code became effective on July 1, 2013.
Rigid board insulation (foam plastic) is an effective draft stop, while providing part of the required R-value of the attic kneewall, if installed on the attic side of the kneewall.
This article discusses building energy simulation software appropriate for use with the Energy Cost Budget method in ASHRAE Standard 90.1 and the Total Building Performance section of the International Energy Conservation Code.
A single top plate is allowed under the International Residential Code, but it is not a common construction practice. The standard practice for exterior and interior wall framing is using a double top plate to connect wall segments, and to support framing above the plates.
A study prepared for the Northwest Energy Efficiency Alliance that "characterize ssingle-family residential new construction using a representative sample of buildings constructed in 2004 and 2005...The results will provide a baseline for ENERGY STAR® New Homes Northwest specifications."
The sun is the main source of heat in all homes. By looking at how houses receive sunlight, site planners can help optimize how much solar energy is available to heat a house, and how much heat must be removed with air conditioning. In hot climates, site planners should use lot orientation to avoid solar gains in the summer.
To have a building certified by the U.S. Green Building Council (USGBC), architects and designers can use several tools to demonstrate that the building complies with various sustainable design requirements. The USGBC certifies the building through the Leadership in Energy and Environmental Design (LEED) Green Building Rating System. This is a voluntary, consensus-based performance rating system. This article discusses the software that may be used to verify compliance.
In accordance with the U.S. Department of Energy's determinations on the 2009 IECC and ASHRAE 90.1-2007, the State of South Carolina is submitting its statutorialy required certification that we have reviewed adn adopted both referenced codes.
Now in it’s second year, the Institute for Market Transformation will again recognize jurisdictions for exemplary work in achieving energy code compliance with the Standard Bearers: Excellence in Energy Code Compliance Award.
Pacific Northwest National Laboratory (PNNL) conducted a series of cost effectiveness analyses for the U.S. Department of Energy (DOE), covering the 2009 and 2012 editions of the International Energy Conservation Code (IECC) for new single and multifamily homes. The evaluations were performed against a 2006 IECC baseline, taking state-specific code amendments into consideration. These reports outline the results of these analyses, including a National Cost Analysis and Cost Analyses for selected states.
This document contains sample survey questions designed for use by states wishing to conduct a survey of their building jurisdictions as one method of better understanding energy code compliance rates in their state.
The goal of the study was twofold: 1) to refine the original estimates made of noncompliance, initial market penetration, and naturally occurring market adoption rates by researching and analyzing the factors contributing to each parameter; and 2) to test the 2006 California Energy Efficiency Evaluation Protocols (Evaluation Protocols) as it applies to determining net savings resulting from Program activities.
This report explains Minnesota’s experience in demonstrating that it is possible to implement a code requiring tight construction, as long as provisions are included for ventilation and make up air to avoid the potential harmful effects of depressurization.
The appropriate treatment of task lighting for energy code compliance has always been a potentially confusing issue. The intent of ASHRAE Standard 90.1-2007 (as well as previous editions back to 1999) and the International Energy Conservation Code (IECC) (including editions back to 2003) is for task lighting to be included in compliance calculations when it is part of the lighting design. This applies to office spaces where task lighting is common, as well as other spaces where task lighting may appear in various forms.
This technical support document (TSD) is designed to explain the technical basis for the COMcheck software as originally developed based on the ANSI/ASHRAE/IES Standard 90.1-1989 (Standard 90.1-1989). Documentation for other national model codes and standards and specific state energy codes supported in COMcheck has been added to this report as appendices. These appendices are intended to provide technical documentation for features specific to the supported codes and for any changes made for state-specific codes that differ from the standard features that support compliance with the national model codes and standards. Beginning with COMcheck version 3.8.0, support for 90.1-1989, 90.1-1999, and the 1998 IECC and version 3.9.0 support for 2000 and 2001 IECC are no longer included, but those sections remain in this document for reference purposes.
This Technical Support Document describes the process and methodology for the development of the Advanced Energy Design Guide (AEDG) for Small Office Buildings, a design guidance document intended to provide recommendations for achieving 30% energy savings in small office buildings over levels contained in ASHRAE Standard 90.1- 1999. This the first in a series of guides being developed by a partnership of organizations, including ASHRAE, the American Institute of Architects, the Illuminating Engineering Society of North America, the New Buildings Institute, and the U.S. Department of Energy.
The Tennessee State Fire Marshal’s Office will implement enforcement of adopted energy codes for new building project submissions as of Friday, July 1, 2011. The energy codes adopted are:
- All buildings other than state buildings: The 2006 International Energy Conservation Code
- State buildings: ASHRAE Standard 90.1-2007.
The State of Tennessee, Department of Commerce and Insurance, Division of Fire Prevention certifies that it has adopted the 2006 International Energy Conservation Code (IECC) for one and two family dwellings and townhouses and non-State owned commercial buildings, and ASHRAE 90.1-2007 for State Buildings.
In 2001, the State of Texas adopted the 2001 International Energy Conservation Codes as its statewide commercial building energy code standard. this report examines the potential impacts of updating lighting requirements in Texas the 2003 IECC.
The State of Texas, in compliance with the Energy Conservation and Production Act (ECPA) of 1976, as amended, has reviewed the provisions of ASHRAE 90.1-2007 for energy efficiency in commercial buildings. The Texas State Energy Conservation Office adopted teh 2009 IECC effective April 1, 2011 for all commercial and residential buildings greater than three stories above grade. A study done by the Energy System's Laboratory of Texas A&M University deomstrates that the 2009 IECC code results in equivalent overall energy savings performance when compared to ASHRAE Standard 90.1-2007 for large office buildings in Texas.
The Texas State Energy Conservation Office, which has the statutory authority to adopt the latest energy codes in Texas, asdopted the 2009 IECC effective April 1, 2011 for all commercial and residential buildings greater than three stories.
The purpose of this brief is to provide a discussion related to amending or not amending model codes and standards when adopting them at the federal, state, or local level. It was considered necessary based on the significant amendment activity related to energy code adoption and the observation that in almost every case mistakes are made—some as significant as inadvertently excluding key building types from the code. In some cases, governing bodies will opt to amend with the goal of increasing energy savings; this is positive, and it is necessary to have states that are trendsetters with regard to efficiency. However, it is sometimes possible for amendment activities to yield the opposite result because of increased debate about the technical provisions and the “islanding” of jurisdictions with respect to the support infrastructure available for implementation and compliance with the model codes and standards.
Today’s energy, economic, and environmental challenges—combined with the fact that buildings consume nearly 40% of the nation’s energy—make energy codes a central part of a sustainable future.
Here are 10 key reasons to adopt them.
Adequate attic ventilation is a long-standing requirement in building codes for moisture control. However, unvented attics can reduce residential energy needs, and are allowed by the code under certain conditions.
Section R806.4 of the 2009 International Residential Code® (IRC), and Section R806.5 of the 2012 IRC have requirements for unvented (conditioned) attic assemblies.
ASHRAE modified its ventilation procedure to reflect more current data available on indoor air quality. The Standard was developed under American National Standards Institute guidelines and released in 2004: ASHRAE Standard 62.1-2004, Ventilation for Acceptable Indoor Air Quality.
An analysis by Pacific Northwest National Laboratory show that the 2009 International Energy Conservation Code (IECC) contains several major improvements in energy efficiency over the current Utah code, the 2006 IECC. The most notable changes are improved duct sealing and efficient lighting requirements. A limited analysis of these changes resulted in estimated savings of $168 to $188 for an average new house in Utah at recent fuel prices.
2012 IECC Chapter 4, annotated with Utah's amendments.
This Guide is designed to assist state and local code jurisdictions in achieving statewide compliance with the 2006 International Energy Conservation Code (IECC) for residential buildings and ASHRAE Standard 90.1-2007 for commercial buildings.
Condensing dryers can be useful in situations where the laundry room is located a significant distance from an exterior wall to which it can vent. By eliminating long dryer vent runs, they eliminate possible moisture condensation problems in that run.
The primary intent behind the requirement for a vestibule is to reduce infiltration into a space that includes doors with high volume of pedestrian traffic. Vestibules reduce the infiltration losses (or gains) from wind and stack effect by creating an air lock entry.
The intent of the vestibule requirement is to reduce infiltration of air into a space, thereby addressing energy conservation and comfort issues for occupants located near primary entrance doors. The majority of infiltration comes through primary entrance doors that are typically used to access public areas, and have higher usage rates than doors classified for personnel use. Vestibules can reduce the infiltration losses (or gains) from wind and stack effects by creating an air lock entry.
In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this is to certify that the State of Washington has adopted the 2012 Edition, Washington State Energy Code, which meets or exceeds the 2012 version of the International Energy Conservation Code (IECC) for low-rise residential buildings, as well as ASHRAE 90.1-2010 for nonresidential buildings.
In compliance with Title III of the Energy Conservation adn Production Act of 1976, as amended, this is to certify that the District of Columbia has taken the appropriate actions as listed to meet the statutory requirements related to the Department of Energy (DOE) determinations for the 2009 International Energy Conservation Code (IECC) and ASHRAE 90.1-2007/
The U.S. Department of Energy has requested Pacific Northwest National Laboratory to estimate the energy savings, economic impacts, and pollution reduction from adopting the 2003 International Energy Conservation Code (IECC) as the mandatory residential energy efficiency code in the state of West Virginia. The state currently allows a less energy efficient replacement option. This report addresses the impacts for low-rise residential buildings only.
This rule establishes the standards considered necessary by the State Fire Commission for the safeguarding of life and property and to ensure compliance with the minimum standards of safe construction of all structures erected or renovated throughout West Virginia.
West Virginia has adopted the 2009 International Energy Conservation Code for residential construction and the ASHRAE 90.1-2007 standard for commercial building construction.
ASHRAE Standard 62.2 defines the roles of and minimum requirements for mechanical and natural ventilation systems to achieve acceptable indoor air quality. This material supplements requirements contained in the model energy codes with respect to mechanical ventilation systems.
Under the statute sections listed in this document, the Department of Commerce has the responsibility to adopt rules that establish uniform, statewide standards for the construction of 1- and 2-family dwellings. This code, in its entirety, first went into effect in 1980. Sections 101.63 (5) and 101.73 (8), Stats., require the department to review these rules on a biennial basis.
This letter will serve as certification that the 2009 IECC code with Wisconsin amendements as contained in SPS chapters 360-366 were implemented on Sept. 1, 2011. Attached to this letter is an analysis of current Wisconsin UDC versus the 2012 IECC (prepared by the Midwest Energy Efficiency Alliance), which Wisconsin is in the process of evaluating (as of the date of this letter). Changes to the Wisconsin Commercial Building Code were also implemented on Septemeber 1, 2011. This letter certifies that Wisconsin Commercial Building Code adopted the 2009 editions of the International Building Code and the International Energy Conservation Code, with amendments as addressed in SPS Chapters 360-366.
As of the writing of this report, the state of Wyoming currently does not have a statewide building energy efficiency code for residential buildings, although Laramie adopted the 2003 International Energy Conservation Code. The U.S. Department of Energy has requested Pacific Northwest National Laboratory to estimate the energy savings and economic impacts from adopting the 2006 IECC. This report addresses the impacts for residential buildings only.