Water heaters by type and feature

Heat pump water heaters

Electric tanks that file a UEF of 2.0 or more — the registry has no separate heat pump type, so this site draws the line there.

309 models

Electric resistance tank water heaters

Electric tanks that file a UEF below 2.0 — heated by elements, not a heat pump.

474 models

Gas tank water heaters

Gas-fired storage tanks, every size and draw pattern on file.

711 models

Gas tankless water heaters

Gas-fired instantaneous units, sized by flow rate rather than tank gallons.

489 models

Electric tankless water heaters

Electric instantaneous units, sized by flow rate rather than tank gallons.

274 models

120-volt plug-in heat pump water heaters

Heat pump models whose ENERGY STAR filing lists a 120 V input — the kind that can run from a standard outlet instead of a new 240 V circuit.

39 models

CO₂ (R-744) heat pump water heaters

Heat pump models whose ENERGY STAR filing names R-744 (carbon dioxide) as the refrigerant, a global warming potential of 1.

42 models

Find what replaces your water heater

Enter the model number off your old unit and see what is on file today, with the yearly cost difference.

Find a water heater that fits

Three questions — fuel, hot water need, install space — narrow every model on file to the ones that fit.

What a water heater costs to run

Prices a unit's efficiency against your own utility's filed tariff for your ZIP code.

Water heaters

Every model on file with the Department of Energy, by heater type.

Water heater recalls on file

Every CPSC recall since 2015 and the models on file it names.

Heat pump water heater rebates by state

Which programs pay today, whether their funding is open, and which models qualify.

How the numbers are calculated

The formula, the tariff rule and where published costs disagree.

What is a good first hour rating for a water heater?

The first hour rating every storage model on file actually lists, by tank size, next to the DOE method for checking it against your own household.