RELIANCE WATER HEATERS HETF-40 1**

The 3,493 kWh figure is computed by this site, not taken from the registry. It starts from the model's registered UEF, the ratio of hot water delivered to energy used, which is 0.93. It then applies the daily hot-water draw that the DOE test sets for the medium draw pattern. If your household draws more or less hot water than the test assumes, your own use will differ from 3,493 kWh. The underlying registry data comes from the DOE CCD, retrieved on 2026-09-19. Each step of the method is set out on the page on how the annual cost is calculated.

Among the 426 models registered as an electric tank at the medium draw pattern, this unit ranks 153rd lowest in energy use. That places it in the second-lowest quarter of its class. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 63 gallons. The tank's rated volume is 36 gallons, and both figures come from the registry listing. A household whose morning peak exceeds 63 gallons falls outside what this rating covers. The selector by fuel, space and size lists other units to check against these 63-gallon and 36-gallon figures.

This page does not state a running cost for the HETF-40 1** in its text. The cost of 3,493 kWh a year depends on your own utility's electricity tariff, which varies by location. The page therefore computes it from your ZIP code, using the same 3,493 kWh at the medium draw pattern. You can rerun that figure with the cost calculator on your own ZIP. The installed price range appears in its own block, with its source and date, as a modeled range rather than a quote. If you need a unit in the same class as the HETF-40 1**, find a same-class replacement by model number. Energy use outside the test's daily draw is not available in the registry data.