Item ID: 40
Commercial Heat Pump Water Heaters
Commercial Water Heaters: Heat Pump vs. Conventional Electric
Remove heat from the immediate or outside atmosphere and transfer it to the water tank.
Heat pump water heaters (HPWH) use heat pump technology to extract heat from air and transfer it to water. They are two to three times more efficient than conventional electric water heaters, and these efficiencies can be higher with advanced technologies.
HPWHs have been available for 20+ years but have not yet been widely adopted because of a general misunderstanding and misapplication of the technology, and the additional labor required to correctly install the units and supporting equipment. This is expected to change as promising new products enter the market. Technological improvements that increase the efficiency include:
- Advanced variable speed compressors,
- Removing the heat pump function from conditioned space, and
- Carbon dioxide refrigerants.
While primarily targeting residential markets, this technology can also be used in commercial applications that generate substantial waste heat and have a high hot water demand. In addition, operations with a high cooling demand could benefit from HPWHs because they capture ambient heat. Examples of these applications include commercial kitchens, laundry facilities, waste water treatment facilities and hospitals. Some applications may require additional ductwork, dampers and controls to vent cool air when unwanted.
Energy Savings: 50%
Energy Savings Rating:
Approved Measure What's this?
|1||Concept not validated||Claims of energy savings may not be credible due to lack of documentation or validation by unbiased experts.|
|2||Concept validated:||An unbiased expert has validated efficiency concepts through technical review and calculations based on engineering principles.|
|3||Limited assessment||An unbiased expert has measured technology characteristics and factors of energy use through one or more tests in typical applications with a clear baseline. |
|4||Extensive assessment||Additional testing in relevant applications and environments has increased knowledge of performance across a broad range of products, applications, and system conditions. |
|5||Comprehensive analysis||Results of lab and field tests have been used to develop methods for reliable prediction of performance across the range of intended applications.|
|6||Approved measure||Protocols for technology application are established and approved.|