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
| Feb 23, 2012
Federal budget cuts put major building projects on hold
A plan to build the National Bio and Agro-Defense Facility in Kansas is among several major building projects in jeopardy after the Obama administration’s 2013 budget was unveiled. The budget would cut all construction spending for the facility.
| Feb 23, 2012
Federal agencies fixed on leasing LEED-certified space
The federal government is especially focused on renting LEED-certified spaces.
| Feb 23, 2012
Regulators investigating construction accident at World Trade Center
The New York Port Authority and the city’s fire and building departments are investigating an accident at the World Trade Center construction site in lower Manhattan after a crane dropped steel beams that fell about 40 stories onto the truck that delivered them.
| Feb 23, 2012
New Virginia statewide building code goes into effect March 1
After March 1, all building plans in Virginia must adhere to the 2009 code that was adopted a year ago.
| Feb 23, 2012
Privatizing flood insurance could lead to new code requirements
One thing that could pave the way toward private flood insurance would be NFIP reforms, like requiring new construction in flood-prone areas to be elevated.
| Feb 22, 2012
ACI BIM manual for cast-in-place concrete in development
The improved communication, coordination, and collaboration afforded by BIM implementation have already been shown to save time and money in projects.
| Feb 20, 2012
Comment period for update to USGBC's LEED Green Building Program now open
This third draft of LEED has been refined to address technical stringency and rigor, measurement and performance tools, and an enhanced user experience.
| Feb 20, 2012
GAF introduces web portal for architects and specifiers
The new portal offers a clean look with minimal clutter to make it easier to find the technical information and product data that architects need.
| Feb 17, 2012
AGC advocates for federal procurement reform
Ensure that small business goals take into consideration actual small business capacity in relevant specialty markets.
