STATE GPVT-40 2**

This site calculates the 242 therms figure; the registry does not publish it. The calculation uses the registry's UEF, the ratio of hot water delivered to energy used, which is 0.7 for this model. It combines that UEF with the DOE test's daily hot-water draw for the high draw pattern. The inputs come from the DOE CCD, retrieved 2026-09-19. The result applies only at the federal test's daily draw. A home that uses more or less hot water will use a different amount of gas. The page on how the annual energy and cost are calculated sets out each step. Among the 414 gas tank models at the high draw pattern, this one ranks 90th lowest in energy use. That puts it in the lowest quarter of its class.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The 242 therms figure describes that kind of household only. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 87 gallons for this model. Its rated volume is 38 gallons. The rating does not cover a household whose busiest hour needs more than 87 gallons. For a smaller household, a figure at a lower draw pattern is not available in this data. So the 18 therms gap to the median should not be applied to that household. To compare other units, use the water heater selector by fuel, space and size. To match this unit's class, use the same-class replacement search by model number.

This text gives no running cost. The cost of 242 therms a year depends on your state's average residential gas price. The page therefore computes it from your ZIP. The water heater cost calculator for your ZIP shows that figure at your own rate. The same rate applies to the 18 therms gap to the class median, so the value of that gap also changes by state. Both figures assume the federal test's daily draw described above. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote. The registry data used here does not report performance at other daily draws for this model, so that is unknown.