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
| May 8, 2014
Report: Top storm-resilient cities have high adaptive capacity
The most resilient cities in the world, including five in the U.S., have attributes that would enable them to recover better than others from devastating natural disasters.
| May 8, 2014
LED lighting helps cities receive Energy Star designation
Thanks largely to an ambitious program to boost the use of LED lighting in its buildings, Los Angeles is the top ranked U.S. city on the Environmental Protection Agency’s annual list of U.S. cities that are doing the most to improve energy efficiency.
| May 8, 2014
Door knob code revisions generating controversy
The City of Vancouver’s ban on doorknobs in all new buildings, which went into effect last month, has drawn a strong reaction from the public and heated debate across Canada as other jurisdictions consider the measure.
| May 8, 2014
Structural concrete code revisions open for public comments
The American Concrete Institute’s completely reorganized ACI 318-14, “Building Code Requirements for Structural Concrete and Commentary,” is open for public review for a 45-day period.
| May 3, 2014
Controversy rages over cost, benefits of proposed OSHA silica dust rule
Introduced in August 2013, the proposal would lower allowable levels of crystalline silica in all workplaces, standardize how the dust is calculated, and require medical monitoring for employees exposed to high levels.
| May 3, 2014
California’s Title 24 promises to reshape the construction industry
California’s recent revisions to Title 24 contain ambitious performance goals: all residential buildings must be Zero Net Energy by 2020 and commercial buildings must reach that standard by 2030.
| Apr 30, 2014
House Appropriations Committee approves $3 billion cut for military construction
The Army would see the sharpest cuts on a percentage basis, with a $578 million, or 52% reduction in FY 2015.
| Apr 30, 2014
GSA wants to trade D.C. office building for construction and development services
The GSA has issued an RFQ seeking developers who can provide construction and development services in exchange for the GSA Regional Office Building and Cotton Annex located in Southwest Washington, D.C.
| Apr 30, 2014
Mexico City spending big on green roofs to fight air pollution
Although green roofs have been widely adopted in urban areas to reduce the heat island effect and stormwater runoff, Mexico City is hoping that vegetative rooftops can also reduce the city’s air pollution.
| Apr 23, 2014
California bill would make employers responsible for subcontractors' wages, workers' comp
Under the recently revised Assembly Bill 1897, employers would have to pay wages, taxes, and workers compensation on behalf of a subcontractor’s workers if the subcontractor reneges on that responsibility.
