A new web-based tool by the Department of Energy offers comprehensive information about how to size, select, and install electric heat pump water heaters (HPWHs).
HPWHs can be two to four times more efficient than standard units. The benefits are maximized when installers follow best practices and choose the best model and size for the home. The HPWH Installation Tool provides customized guidance for installers, sales associates, and homeowners to help overcome barriers to HPWH adoption.
A HPWH resembles a traditional water heater, but rather than using a gas-fired burner or electrical element to warm the water in the tank, the HPWH extracts heat from the surrounding air. Both HPWHs and traditional water heaters last for about 15 years, but HPWHs require a certain amount of airflow to operate effectively, so the location of the water heater needs to be evaluated. It’s important that HPWHs are sized correctly because an undersized heater could, under certain conditions, result in lukewarm water.
The installation tool also helps determine whether a home’s electrical panel needs to be updated—a common situation when replacing a fossil fuel-fired water heater with a HPWH—or if a HPWH that plugs into a standard 120-volt electrical outlet might be a viable option.
Related Stories
Codes and Standards | Jul 16, 2015
Berkeley, Calif., adopts balcony inspection program following deadly collapse
Apartment building balconies will be subject to inspections every three years under new regulations adopted following a deadly collapse.
Codes and Standards | Jul 16, 2015
Oregon to spend $300 million for seismic updates on public buildings
A survey found that more than 1,000 Oregon school buildings face a high risk of collapse during earthquakes.
Smart Buildings | Jul 12, 2015
Office of Management and Budget asks agencies to consider climate change when budgeting for construction projects
For the first time, the U.S. Office of Management and Budget is asking agencies to submit budget plans that consider the effects of climate change on construction and maintenance of federal facilities.
Engineers | Jul 12, 2015
White paper explores low-flow toilets’ impact on drain lines, clogs
The research found that certain variables: toilet paper—along with the pipe slope and flush volume—are key variables in determining whether drain lines might be predisposed to clog.
Contractors | Jul 9, 2015
Opioid abuse blamed for increase in worker injuries, business losses
Insurance giant CNA says concerns are increasing in the construction industry.
Codes and Standards | Jul 8, 2015
California Supreme Court upholds affordable housing requirements
Court cites affordable housing crisis of ‘epic proportions.’
Codes and Standards | Jul 6, 2015
First valuation advisory for green and high performance property adopted
The document provides voluntary guidance to appraisers on the background and competency necessary to credibly value green buildings.
Codes and Standards | Jun 24, 2015
Maryland’s Prince George County turns to P3s to build green infrastructure
Over the next 10 years, the county must convert 15,000 acres of watertight surfaces—almost 5% of the county's total area—into surfaces that absorb or treat rainwater.
Codes and Standards | Jun 24, 2015
Philadelphia considers more incentives for green building
Developers could be allowed additional height, floor area on projects that meet benchmarks.
Codes and Standards | Jun 24, 2015
LEED building at Duke University may be retrofitted to prevent bird deaths
More birds die from colliding with buildings at Duke than on any other campus in a 45-school survey conducted by Augustana College. Duke is located along the Atlantic Flyway, a bird migration route.
