AMERICAN STANDARD WATER HEATERS PV40TLN*50*

The 242 therms figure is computed by this site, not taken from the registry. 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 this draw pattern. This model's UEF is 0.7. The high draw pattern stands for a larger household, or one where showers and laundry overlap. The figure holds at that federal test draw only. A home that draws more or less hot water each day will use a different amount of gas. The source is DOE CCD, retrieved 2026-09-19. The steps are set out on the page explaining how the annual energy and cost figures are calculated.

The class behind the rank above is the 414 models registered as a gas tank at the high draw pattern. Within it, this model falls in the lowest quarter for energy use. The 18 therms gap to the median holds only at the federal test draw. The model has a rated volume of 38 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 83 gallons. Whether 83 gallons covers a given household's busiest hour is not in the registry data. For a home whose usage differs from the high draw pattern, this page has no comparison. To check an alternative in the same class, you can find a same-class replacement by model number.

No running cost appears in this text. It depends on the reader's state average residential gas price, so the page computes it from the reader's ZIP. That rate is applied to the 242 therms a year at the high draw pattern. Use the water heater cost calculator for your own ZIP to see that figure. The installed price range sits in its own block on the page, with its source and date. It is a modeled installed-cost range, not a quote. No single national running cost is given here, because the gas rate varies by state. On any one rate, the running-cost gap between this model and the class median follows the 18 therms energy gap at the federal test draw.