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 | Sep 6, 2018
Coalition of mayors around the globe pledge net-zero buildings by 2030
New construction to produce as much energy as it consumes.
Codes and Standards | Sep 5, 2018
New White Paper on Metal Panel Fire Safety Released
Has detailed information for insulation, fire safety requirements in U.S., other countries.
Codes and Standards | Aug 31, 2018
Trade war could make adaptive reuse more attractive
Higher cost of building materials could make rehab a better financial bet.
Codes and Standards | Aug 30, 2018
Metrics should guide strategy for schools seeking LEED certification
Assessing current status helps direct where improvements can have greatest impact.
Codes and Standards | Aug 29, 2018
The 2018 IAPMO solar and swimming pool codes now available
For installation and inspection of public and private swimming pools, spas, and hot tubs.
Codes and Standards | Aug 28, 2018
New York’s green roof program needs reform
Despite incentives, few owners add vegetative roofs.
Codes and Standards | Aug 24, 2018
Resilience, sustainability emphasized in plans for new 23,000-acre city in the Philippines
“A backup for when Manila fails.”
Codes and Standards | Aug 23, 2018
Cities promote deconstruction of old homes with mixed results
Market factors complicate efforts to recycle material from old structures.
Codes and Standards | Aug 22, 2018
Oregon is first state to change building code to allow tall mass timber buildings
Statewide alternate method allows early technical consideration and approval.
Codes and Standards | Aug 21, 2018
First mass timber panel made from structural composite lumber gets APA certification
Said to be much more cost effective than CLT options.
