AMERICAN GDVT-50 3**

The annual figure for the AMERICAN GDVT-50 3** is 260 therms of natural gas, at the high draw pattern only. This site computed it, not the registry, from the registry's UEF and the DOE test's daily hot-water draw for that pattern. UEF, the ratio of hot water delivered to energy used, is 0.65 for this model. The source is the DOE CCD, retrieved 2026-09-19. Among the 414 gas tank models registered at this draw pattern, this unit ranks 204th lowest for energy use, which places it in the second-lowest quarter of its class. The class median is 260 therms, so the difference is 0 therms. The methodology page explains how the annual figure is calculated.

A high draw pattern describes a larger household, or one where showers and laundry overlap. The figure of 260 therms applies to that pattern and does not describe a household with lighter or different use. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 82 gallons for this model, and its rated volume is 48 gallons. These are registry values and say nothing about the peak demand of a specific home. Measured energy use in an individual home is not available in the registry data. To compare other fuels, spaces or sizes, the water heater selector filters by fuel, space and size.

The running cost is not stated here because it depends on the state average residential gas price where you live. To check it, multiply 260 therms by your own gas rate per therm; the cost calculator does this from your ZIP. Because the difference from the class median is 0 therms, a model at the class median of 260 therms would cost the same at the same rate. The modeled installed-cost range appears in its own block with its source and date, and it is not a quote. To look for a unit in the same class, you can find a same-class replacement by model number.