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
| Jan 16, 2013
Standards that include reflective roofs must take into account local climate
Roofs painted white can reflect heat and reduce warm-weather energy use, but in cooler regions like Minneapolis or Chicago, the issue of energy-efficiency is less straightforward.
| Jan 16, 2013
New standard for geothermal heat pump systems piping to be included in 2015 International Mechanical Code
NSF International, an independent global organization that writes standards, and tests and certifies products, has published the first in a series of American National Standards for Ground-Source Geothermal Piping Systems – NSF/ANSI 358-1.
| Jan 16, 2013
ANSI passes new safety standards for reinforcing steel and post-tensioning
The ANSI A10 Accredited Standards Committee for Construction and Demolition Operations recently approved amendments to the ANSI A10.9 Concrete and Masonry Standard.
| Jan 8, 2013
Congress passes Drywall Safety Act
Congress recently passed the Drywall Safety Act; President Barack Obama is expected to sign it soon.
| Jan 8, 2013
Building-integrated PVs could help boost green standards over the next few years
A developing technology could begin to have an impact on sustainable standards over the next few years.
| Jan 8, 2013
Revamp of codes among nine low tech steps to raise community resiliency
Updating of local zoning and building codes is one of nine low-tech steps that can boost sustainability and storm resiliency, according to this article.
| Jan 8, 2013
Group releases safety and building codes from 24 countries
Public.Resource.Org released 10,062 public safety documents including building codes covering 24 countries and 6 regions.
| Jan 8, 2013
Montana developing high-performance building standards for state projects
The Montana Department of Administration is developing a single building standard for all state facilities, and hopes to have a plan in place this spring.
| Jan 4, 2013
AGC economist says "fiscal cliff" deal will give construction a boost
The deal in Congress to avoid going over the so-called fiscal cliff "should encourage many businesses to go ahead with projects they have held in reserve," said Ken Simonson, chief economist of the Associated General Contractors of America.
| Jan 4, 2013
California standards on furnishings, insulation to be revised
California is revising the state’s standards on interior furniture and insulation to maintain or improve fire safety while reducing or eliminating the use of toxic chemicals.
