ASHRAE has released a new standard that defines the terms "zero Energy" and "zero carbon" to describe buildings.
ANSI/ASHRAE Standard 228-2023, Standard Method of Evaluating Zero Net Energy and Zero Net Carbon Building Performance, sets requirements for evaluating whether a building or group of buildings meets a definition of “zero net energy” or a definition of “zero net carbon” during operation. The standard draws from other ASHRAE standards to address energy and carbon flows across a site boundary, their measurement, and their balance.
“Achieving a zero energy building has been viewed by many as a difficult goal to meet, with unforeseeable roadblocks and differing guidance,” said Keith Emerson, P.E., Life Member ASHRAE, chair of the Standards Project Committee 228. Standard 228 provides a consistent method for determining whether new and existing sites have reached zero energy. We hope this standard will become a helpful resource for building professionals in strategic decarbonization planning.”
Features of Standard 228 include:
- Allowances for sites that lack the means to produce adequate renewable energy, while placing additional requirements on the use of external carbon and renewable energy in the calculation.
- Defined calculation of energy in terms of source—a multiplier on the energy crossing the site boundary including energy used or lost in extraction, generation, and transit to the site.
- The main energy calculation made in terms of annual average factors. Allowance is made for the calculation of individual hours where data is available.
Related Stories
Contractors | Oct 19, 2023
Crane Index indicates slowing private-sector construction
Private-sector construction in major North American cities is slowing, according to the latest RLB Crane Index. The number of tower cranes in use declined 10% since the first quarter of 2023. The index, compiled by consulting firm Rider Levett Bucknall (RLB), found that only two of 14 cities—Boston and Toronto—saw increased crane counts.
Office Buildings | Oct 19, 2023
Proportion of workforce based at home drops to lowest level since pandemic began
The proportion of the U.S. workforce working remotely has dropped considerably since the start of the Covid 19 pandemic, but office vacancy rates continue to rise. Fewer than 26% of households have someone who worked remotely at least one day a week, down sharply from 39% in early 2021, according to the latest Census Bureau Household Pulse Surveys.
Contractors | Oct 19, 2023
Poor productivity cost U.S contractors as much as $40 billion last year
U.S. contractors lost between $30 billion and $40 billion in 2022 due to poor labor productivity, according to a new report from FMI Corp. The survey focused on self-performing contractors, those typically engaged as a trade partner to a general contractor.
Products and Materials | Oct 10, 2023
‘Works with WELL’ product licensing program launched by International WELL Building Institute
The International WELL Building Institute (IWBI) recently launched the Works with WELL product licensing program. Works with Well certification allows manufacturers to demonstrate that their products align with WELL strategies.
Mass Timber | Oct 10, 2023
New York City launches Mass Timber Studio to spur more wood construction
New York City Economic Development Corporation (NYCEDC) recently launched New York City Mass Timber Studio, “a technical assistance program to support active mass timber development projects in the early phases of project planning and design.”
Codes and Standards | Oct 10, 2023
Green Seal will not certify any paints, coatings, floor care products containing PFAS
Green Seal will no longer certify any paints and coatings, floor care products, adhesives, and degreasers containing any per- and polyfluoroalkyl substances (PFAS), commonly called “forever chemicals.”
Codes and Standards | Oct 4, 2023
Local officials press California governor for statewide all-electric building mandate
More than two dozen local government officials in California recently signed a letter urging Gov. Gavin Newsom to back a statewide all-electric mandate for all new building construction. This action is needed, the officials say, after a U.S. 9th Circuit Court of Appeals ruling this year nullified the city of Berkeley’s ban on natural gas hookups on new buildings.
Regulations | Oct 4, 2023
New York adopts emissions limits on concrete
New York State recently adopted emissions limits on concrete used for state-funded public building and transportation projects. It is the first state initiative in the U.S. to enact concrete emissions limits on projects undertaken by all agencies, according to a press release from the governor’s office.
Architects | Oct 4, 2023
Architects and contractors underestimate cyberattack risk
Design and construction industry firms underestimate their vulnerability to cyberattacks, according to a new report, Data Resilience in Design and Construction: How Digital Discipline Builds Stronger Firms by Dodge Construction Network and content security and management company Egnyte.
Standards | Sep 25, 2023
Updated specification for PVC exterior profiles on windows, doors, and skylights
The Fenestration and Glazing Industry Alliance (FGIA) updated a specification establishing minimum requirements for Polyvinyl Chloride (PVC) exterior profiles that are used in windows, doors, and skylights.
