AMERICAN STANDARD WATER HEATERS PV40TLN*

The figure of 242 therms is computed by this site, not published by the registry. It combines two inputs. One is the registry's UEF, the ratio of hot water delivered to energy used, which is 0.7 for this model. The other is the DOE test's daily hot-water draw for the high draw pattern. The source is the DOE CCD, retrieved 2026-09-19. The figure is natural gas use at the federal test's draw, not a measurement of any particular home. The median for the 414 models registered as a gas tank at the high draw pattern is 260 therms. This model sits 18 therms below it, 90th lowest of 414, in the lowest quarter of its class for energy use.

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 78 gallons. Its rated volume is 38 gallons. Both values come from the registry, and they are the ones to compare with your own busiest hour of hot-water use. The data here does not say how many people a household needs, so the page makes no judgment about fit for a specific home. A household that draws less than the federal test would use a different amount than 242 therms, and that amount is not available. To compare by fuel, space and size, use the water heater selector.

Running cost is not stated in the text because it depends on the state average residential gas price, which differs by reader. The cost calculator on your own ZIP applies that price to 242 therms at the high draw pattern. The steps behind the calculation are described in how the annual cost is calculated. The 18 therms gap to the 260 therms class median converts to a cost difference only at that same rate, and no such value is given here. The installed-cost range appears in its own block with its source and date, as a modeled range and not a quote. To look for another unit in the same class, find a same-class replacement by model number starting from PV40TLN*.