The newly revised ANSI/ASHRAE Standard 105-2014, Standard Methods of Determining, Expressing, and Comparing Building Energy Performance and Greenhouse Gas Emissions, is intended to provide consistency in reporting the energy performance of existing or proposed buildings.
The standard answers such questions as: Should the measurements of a building’s area used in the equation to derive energy use per square foot be taken from the exterior dimensions or to the centerline of the wall? And, should storage spaces be included even though they are unoccupied?
“A standard method of measurement is needed to compare one building’s energy use to another,” says Keith Emerson chair of the Standard 105 committee. “For instance, comparing one building’s summer energy use to another building's winter use would be comparing apples and oranges.”
The standard provides a common basis for reporting building energy use in delivered energy forms and expressions of energy performance, and for comparing energy performance in terms of energy resources used and greenhouse gas emissions created—both across buildings and for energy efficiency measures within buildings. It also provides guidelines for comparing design options.
“To keep the standard flexible, a number of decisions are left to those who adopt it, including what should be calculated beyond site energy and the multipliers for those additional calculations,” Emerson said.
Related Stories
| Mar 30, 2012
CSI webinar: Durable & energy efficient building envelope design, April 24
This seminar will review recent changes in North America energy codes, examples of building enclosure wall assemblies being considered for code compliance, potential moisture management and durability challenges, and design tools that could be used to assess and minimize potential problems.
| Mar 30, 2012
Improved construction that followed seismic codes helped avert loss of life in Mexico temblor
A magnitude-7.4 earthquake that shook Mexico from Mexico City to Acapulco damaged hundreds of homes and sent thousands fleeing from swaying office buildings, yet no one was killed, according to early reports.
| Mar 30, 2012
Chicago may allow people to live in retail spaces
The Chicago City Council’s Zoning Committee approved a zoning change that will allow up to 50% of work space in low-intensity business districts to be used for living space.
| Mar 30, 2012
LEED growing fast in the housing rental market
Last year, developers of 23,000 U.S. multifamily housing units applied for LEED certification.
| Mar 30, 2012
Forest Stewardship Council critical of proposed LEED 2012 changes
According to the Forest Stewardship Council (FSC), the third draft of LEED 2012, if approved as written, would represent a step backward from the current Certified Wood Credit.
| Mar 22, 2012
Symposium on water efficiency: How much more water can be saved?
The Third International Emerging Technology Symposium by IAPMO and the World Plumbing Council features a session on water efficiency.
| Mar 22, 2012
Broker doesn’t have to inform contractor that insurer went broke, California court rules
A California appellate court ruled that an insurance broker did not have a duty to inform a subcontractor that a project’s insurer had gone bankrupt.
| Mar 22, 2012
Public agencies shouldn’t negotiate project labor agreements, says AGC official
When a public agency rather than the contractor negotiates a PLA with unions, it interferes with the right of employers and workers to reach their own agreements on working conditions and benefits, says Steve Isenhart, president of the Associated General Contractors of Washington.
| Mar 22, 2012
Proposed rule would let crane operators get licenses without prior city experience
The Bloomberg administration is considering letting operators of giant tower cranes get their license without requiring that they first run cranes as apprentices in the city for three years.
