STATE GPVNT-50 1**

This site calculated the 235 therms figure; the registry does not list it. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the high pattern. This unit's UEF is 0.72. The underlying record comes from the DOE CCD, retrieved 2026-09-19. The figure holds only at that test draw. A home that draws more or less hot water each day will use a different amount of gas. The class comparison covers the 414 models registered as a gas tank at the high draw pattern. Within that group, this model sits in the lowest quarter for energy use. The method behind the annual figure lists each step.

The high draw pattern describes a larger household, or one where showers and laundry overlap. This model's first hour rating, the gallons of hot water available in the first hour from a full tank, is 85 gallons. Its rated volume is 48 gallons. Together, these two figures show how much hot water the tank supplied in the first hour of the federal test. For a smaller household that draws less hot water, the 235 therms figure does not apply directly. The registry gives no annual figure for this model at a lower draw pattern, so that value is not available here. To compare other units by fuel, space and size, use the water heater selector.

The text on this page gives no running cost. The cost of 235 therms of natural gas a year depends on your state's average residential gas price. So the page works it out from your ZIP code and does not estimate one figure for everyone. This model uses 25 therms less gas a year than the class median of 260 therms. Applying your rate to that gap shows the cost difference. Until your rate is applied, that difference in money terms is unknown. You can see the figure for your area in the cost calculator for your own ZIP. If you are matching an existing unit, find a same-class replacement by model number.