LOCHINVAR G9-UT5040NVR 5**

This site computed the 264 therms figure; it does not come 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 the high draw pattern. For this model the UEF is 0.64. The figure holds only at that test draw and is not a measurement of any one home. The class is the 414 models registered as a gas tank at the high draw pattern. Within that class, this unit ranks 236th lowest for energy use. That puts it in the second-highest quarter of its class for energy use. The source is the DOE CCD, retrieved 2026-09-19. The method behind the annual energy and cost figures sets out each input.

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 48 gallons. Check those two figures against a quote or a listing for a home of that kind. A household that uses less hot water than the test assumes does not match the draw behind 264 therms. For that home, the figure would not describe its own gas use. The registry data does not show whether this unit meets a given home's peak demand. To compare other gas tank models at the same draw pattern, use the same-class replacement search by model number.

This text gives no running cost. The cost depends on your state's average residential gas price, so the page computes it from your ZIP. At the high draw pattern, that cost is based on the 264 therms this unit uses a year. The class median unit uses 260 therms, so the difference in energy is 4 therms. At the same gas price, any cost gap between the two comes from that energy gap. Enter your ZIP in the running cost calculator for your own ZIP to see the figure at your rate. The installed-price range on this page appears in its own block, with its source and date. It is a modeled range, not a quote.