LOCHINVAR GPVNT-40 1**

The registry does not print the 232 therms figure. This site calculated it from the UEF, the ratio of hot water delivered to energy used, which is 0.73 for this model in the DOE CCD. The second input is the DOE test's daily hot-water draw for the high draw pattern. The registry data was retrieved 2026-09-19, and the steps are set out in how the annual cost is calculated. The class comparison uses the same condition. It covers the 414 models registered as a gas tank at the high draw pattern, with a median of 260 therms a year. At 28 therms below that median, this unit is in the lowest quarter of its class for energy use.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. The unit's first hour rating, the gallons of hot water available in the first hour from a full tank, is 91 gallons. Its rated volume is 38 gallons. The rating does not cover a home whose busiest hour needs more than 91 gallons. The registry data here does not show how the unit performs in that case. A home without a natural gas supply is also outside this model's fuel. To compare other fuels or sizes, use the selector by fuel, space and size. To stay within this unit's class, find a same-class replacement by model number.

This text gives no running cost for the LOCHINVAR GPVNT-40 1**. The cost depends on your state's average residential gas price, so the page calculates it from your ZIP. That calculation uses the 232 therms figure at the high draw pattern. You can run it yourself in the cost calculator on your own ZIP. The installed price range appears in its own block with its source and date. It is a modeled installed-cost range, not a quote. Two things are unknown here. One is this unit's gas use at your household's actual daily draw. The other is whether the 28 therms gap to the class median holds at that draw. The energy figure and the class gap apply only at the federal test's daily hot-water draw.