Efficient electric hot water heating technologies significantly reduce the carbon emissions of multifamily buildings, according to a report by the American Council for an Energy-Efficient Economy (ACEEE) and New Buildings Institute (NBI).
In multifamily buildings with five or more units, water heating uses more energy than space heating, cooling, or lighting, the report says. Converting gas-fired water heaters to advanced technology—electric heat pump water heaters (HPWHs)—would cut greenhouse gas emissions from water heating by an average of 58%.
If HPWHs are powered entirely by clean sources, they cause zero emissions, making them a critical tool for decarbonizing the economy. Efficient electric water heaters carry a higher upfront cost over gas models, so policymakers would have to provide incentives to owners to make the conversion, the report says.
“Many utilities offer incentives for building or unit owners to install in-unit heat pump hot water heaters,” an ACEEE/NBI news release says. “Yet few programs are designed specifically for multifamily buildings, which offer unique challenges.”
Related Stories
| Feb 26, 2013
CRSI releases new technical note on stainless steel reinforcing bars
The Concrete Reinforcing Steel Institute (CRSI) has released a new technical note, Frequently Asked Questions (FAQ) about Stainless Steel Reinforcing Bars, to its online collection.
| Feb 26, 2013
Proposed ASHRAE standard revisions would boost requirement for automatic lighting
Proposed changes to the ASHRAE/IES energy standard would require automatic lighting controls in more space types and shorten the times before lighting is automatically reduced or shut off.
| Feb 20, 2013
Bill would make all California state building codes free and open source
California Assembly Bill 292 would make the California Code of Regulations (including the Building Codes) open source.
| Feb 20, 2013
Pittsburgh’s Phipps Conservatory aims for three top green certifications
The $15 million Center for Sustainable Landscapes at Phipps Conservatory and Botanical Gardens in Pittsburgh, a net-zero facility, is applying for certification from three of the world's most stringent green rating systems—the Living Building Challenge, LEED Platinum, and the Sustainable Sites Initiative.
| Feb 20, 2013
ANSI/CRRC Cool Roof Standard has been approved
The Cool Roof Rating Council says the American National Standards Institute has given final approval of its ANSI/CRRC-1-2012 Standard after a two-year public review process.
| Feb 20, 2013
Group of West Coast civil engineers developing building standards for tsunamis
A group of civil engineers from around the western U.S. is developing additions to the building code to address the threat of a tsunami.
| Feb 20, 2013
Higher standards, efficiency programs keys to 40% energy usage reduction in commercial buildings since 1980
Commercial buildings have seen a drop in their energy intensity of more than 40% since 1980, according to a recent report from Bloomberg New Energy Finance and the Business Council for Sustainable Energy.
| Feb 12, 2013
Higher education institutions providing leadership on sustainability
More than 665 U.S. colleges and universities have publicly committed to pursue net-zero carbon emissions.
| Feb 12, 2013
ASHRAE publishes protocols for performance measurement
ASHRAE has published “Performance Measurement Procedures for Commercial Buildings: Best Practices Guide,” a how-to guide for continuously evaluating and improving the performance of commercial buildings throughout their service life.
| Feb 12, 2013
California resolves ADA inconsistencies with 2013 building code
The recently adopted 2013 California Building Code (CBC) revisions bring the state code in line with the federal Americans With Disabilities Act 2010.
