Rheem XE38S06ST38U1

The 2,466 kWh figure comes from this site's own calculation, not from the registry. It combines two inputs. The first is the model's UEF, the ratio of hot water delivered to energy used, which is registered here as 0.91. The second is the daily hot-water draw that the DOE test sets for the low draw pattern. Both inputs come from the DOE Compliance Certification Database (CCD), retrieved 2026-09-19. Because the figure rests on that fixed test draw, it only describes use under federal test conditions. A household that uses more or less hot water each day than the test assumes will not match 2,466 kWh. This page has no figure for other usage levels. The steps are set out in how the annual energy and running cost are calculated.

DOE uses the low draw pattern to represent a small household. This tank's first hour rating, the gallons of hot water available in the first hour from a full tank, is 49 gallons. Its rated volume is 35 gallons. A home whose busiest hour needs more than 49 gallons falls outside what this rating covers. The class comparison in the summary counts only the 163 models registered as an electric tank at the low draw pattern. It does not rank this unit against other fuels, other heater types or other draw patterns. To compare across those groups, use the water heater selector by fuel, space and size.

This text gives no running cost. The cost of 2,466 kWh a year depends on your own utility's electricity tariff. For that reason, the page calculates it from your ZIP rather than estimating it. Enter your ZIP in the cost calculator for your own electricity rate to see the figure for your tariff. This page also gives no installed price range for the Rheem XE38S06ST38U1. The model's ratings fall outside the range the cost database's model was fitted on, and this site does not extend that range beyond its data. If you are checking a quote, this page has no installed price to compare it against. It shows only the energy figure and where the model ranks in its class.