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New U.S. Code to Remake Energy Mandates

Monday, September 9, 2013

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From American Samoa to Wyoming, U.S. states, territories and the District of Columbia are scrambling to prepare for looming federal changes in commercial building energy codes that will affect everything from air barriers to motion detectors.

A U.S. Department of Energy final determination issued Oct. 18, 2011, gave states two years to adopt ASHRAE’s Energy Standard for Buildings Except for Low-Rise Residential Buildings (90.1-2010) or upgrade their building codes and standards to meet its requirements.

The standard covers the design and construction of commercial buildings (or non-residential buildings) defined in the context of energy codes and standards as “all buildings other than low-rise residential buildings, including multi-family high-rise residential buildings over three stories in height above grade.”

National Energy Codes
U.S. Department of Energy

A map posted on DOE’s website indicates each jurisdiction’s energy code adoption status as of August 2013. The DOE determined that ASHRAE's 2010 Standard 90.1 would save 18.2 percent more energy in commercial buildings than the 2007 version of Standard 90.1.

Further, the standard covers new buildings and their systems, new portions of buildings and their systems, as well as new systems and equipment upgrades to existing buildings, according to ASHRAE.

The changes will affect not only the building envelope, but also interior lighting, occupant-sensing controls and expanded modeling requirements, according to ASHRAE. They include provisions for a continuous air barrier and improved energy efficiency.

DOE’s determination makes the 2010 ASHRAE measure—rather than its 2007 predecessor—the model reference standard for state building energy codes under the federal Energy Conservation and Production Act. Many states currently use the 2007 standard; however, there are a few states and U.S. territories that have not enacted statewide building energy codes as required.

And the clock is ticking rapidly toward the final compliance deadline next month.

Meanwhile, the Energy Department published a new rule in the Federal Register, updating the baseline federal commercial building standards to the 2010 ASHRAE standard. That rule, which applies to all federal agencies, is effective Monday (Sept. 9). It covers federal buildings in which design began on or after July 9, 2014.

‘Significant Development’

The new ASHRAE measure is “one of the most significant developments in industry standards,” Vincent Cammalleri of the Building Science Practice group at Simpson, Gumpertz & Heger Inc., told Durability + Design in “Integrated Design: Connecting All the Dots in Enclosure Assemblies.”

“The air-barrier requirements also include performance values for assemblies, rather than just materials, and detailing requirements,” he said.

Deadlines and Compliance Status

States, territories and the District of Columbia have until Oct. 18 to file a certification statement with the DOE that they have reviewed their respective commercial building codes and updated them to meet the standard.

A map posted on DOE’s website indicates each jurisdiction’s energy code adoption status as of August 2013.

According to the map, Washington State, Oregon, California, Mississippi, Illinois, Massachusetts, Rhode Island, Maryland, and Washington D.C. have adopted codes equivalent to or exceeding ASHRAE 90.1-2010/2012 IECC.

U.S. Department of Energy Energy Efficient Buildings Hub
U.S. Department of Energy

The changes in building energy codes will affect not only the building envelope, but also interior lighting, occupant-sensing controls and expanded modeling requirements, according to ASHRAE. They include provisions for a continuous air barrier and improved energy efficiency.

With the new codes will come new materials and products, as manufacturers race to capture new market share.

DOE’s Determinations, Analysis

A third-party quantitative analysis prepared in October 2011 for DOE indicated that buildings built to ASHRAE’s 2010 standard consumed about 18.2 percent less energy nationally than those built to the 2007 standard.

In addition, the DOE estimated the site energy savings at 18.5 percent. Site energy refers to the energy consumed at the building site, the DOE says.

A companion qualitative analysis of the 2007 and 2010 editions of ASHRAE Standard 90.1 evaluated the impact of each change on the energy efficiency of a building. That analysis deemed 47 changes made in the 2010 version as neutral, 19 as having a major positive impact, 37 as having a minor positive impact, and six as having a minor negative impact.

Resources for Professionals

DOE’s online Resource Center provides information and technical assistance designed to answer questions and address issues related to energy codes.

The Resource Center also includes frequently asked questions, publications, model adoption policies, compliance software and tools, and training/eLearning modules based on best practices.

Experts from DOE’s Building Energy Codes Program are also available to answer individual questions submitted through the site’s help desk.

History of 90.1

Originally developed in response to the energy crisis of the 1970s, ASHRAE’s Standard 90.1 has become the basis for building codes and the standard for building design and construction throughout the United States.

Users manual
www.ashrae.org

ASHRAE (The American Society of Heating, Refrigeration and Air-Conditioning Engineers) says Standard 90.1 has become the basis for building codes, and the standard for building design and construction throughout the U.S. The organization has a variety of technical manuals available at www.ashrae.org.

As buildings consume about 40 percent of the primary energy in the country, the standard “is an indispensable reference for engineers and other professionals involved in the design of buildings and building systems,” ASHRAE said. Primary energy refers to the energy required to generate and deliver energy to the site, DOE said.

ASHRAE publishes a revised version of the standard every three years. A 2013 version of Standard 90.1 is anticipated in October, said ASHRAE spokeswoman Amanda Dean.

Comment Period on Methods

As jurisdictions worked last month to finalize new codes (or file for extensions), the DOE was still putting the fine points on its part of the new order.

On Aug. 6, the agency published in the Federal Register a request for information and public comment on its methodology for assessing compliance with local, state and national building energy codes.

The deadline to submit comments was Sept. 5.

   

Tagged categories: Air barriers; ASHRAE; ASHRAE 90.1; Building codes; Certifications and standards; Energy codes; Energy efficiency

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