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Database

This database currently includes about 300 technologies and is updated regularly. You can scroll through the entire database or you can use the search tool on the right to focus on specific types of technologies or sectors. The search tool defaults to looking for the exact phrase entered in the search box, however a broader search is possible by unchecking the 'Use exact phrase' option.
Refer to our glossary for terms and field definitions used in this database.

 

Current query: "Energy System: Water Heating")
Showing 50 items per page
Page: 1
10 results
CO2 Heat Pump Water Heaters
An energy-efficient electric heat pump water heating system that uses heat extracted from the air to heat water for residential use. These heat pumps use supercritical carbon dioxide as a refrigerant.
TAG Technical Score:
 
Energy Savings: 66%
Regional Potential: 6.74 MWh/year
ID: 389
 
Commercial Heat Pump Water Heaters
Remove heat from the immediate or outside atmosphere and transfer it to the water tank.
TAG Technical Score:
 
Energy Savings: 50%
 
ID: 40
 
Drain-Water Heat Recovery
Copper-coiled heat exchanger to recover heat from waste hot water. For showers or other domestic hot water.
TAG Technical Score:
 
Energy Savings: 30%
Regional Potential: 2.46 MWh/year
ID: 157
 
Heat Pump Water Heater-Residential Integrated Units
Heat pump water heaters (HPWHs) use a heat pump refrigeration cycle to remove heat from the surrounding air and transfer that heat at a higher temperature into the integral hot water storage tank. “Integrated Units” means that the heat pump and water heater tank are pre-m...
TAG Technical Score:
 
Energy Savings: 50%
Regional Potential: 2.16 MWh/year
ID: 172
 
Heat Pump Water Heaters for Commercial Kitchens
Heat pump water heater or reverse cycle chiller designed for use in commercial kitchens.
TAG Technical Score:
 
Energy Savings: 50%
 
ID: 292
 
Page: 1
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Search Tips

Key Words and Phrases



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Energy Systems

Sectors






Energy Savings Reliability

ESR descriptions  
LevelStatusDescription
1Concept not validatedClaims of energy savings may not be credible due to lack of documentation or validation by unbiased experts.
2Concept validated:An unbiased expert has validated efficiency concepts through technical review and calculations based on engineering principles.
3Limited assessmentAn unbiased expert has measured technology characteristics and factors of energy use through one or more tests in typical applications with a clear baseline.
4Extensive assessmentAdditional testing in relevant applications and environments has increased knowledge of performance across a broad range of products, applications, and system conditions.
5Comprehensive analysisResults of lab and field tests have been used to develop methods for reliable prediction of performance across the range of intended applications.
6Approved measureProtocols for technology application are established and approved.





Technical Advisory Groups











TAG Technical Score






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Click any of the category headers (e.g., "Energy Systems," "Sectors," etc.) to select filter criteria that will narrow down the list of E3T technologies displayed.

You may also (or instead) use key words and/or phrases. Results can be more specific if you use phrases (enclosed in quotes) rather than words only. For example, entering the words "variable" and "speed" (without quotes) into the "Key Words and Phrases" box will return any technologies where either word is present in the information stored for that technology. But if you enter "variable speed" (including the quotes) only technologies where that exact phrase appears will be returned.

Note that technologies and new information that have been entered very recently may not appear until the next time our search engine indexes the site. Indexing occurs about every 4 hours.

For field definitions see the glossary.
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