VESTA VRS PLUS-199

The 176 therms figure is computed by this site, not published by 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 pattern. For this model the UEF is 0.96, taken from the DOE CCD as retrieved on 2026-09-19. The result holds only at that test draw. It does not describe a household that draws more or less hot water than the test assumes. Against its class, the unit ranks 12th lowest in energy use of 397, which places it in the lowest quarter of the class. The method behind the figure is set out on the page explaining how the annual cost is calculated.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. The 176 therms figure and the 12th rank describe that kind of use only. The registry also lists a maximum flow rate in gallons per minute of 5.9 for this unit. Whether that flow covers a given home's fixtures running at the same time is not available in this data. For a household that fits a lower draw pattern, this energy figure does not apply, and no figure for other patterns is given here. To compare units on other terms, use the selector by fuel, space and size. To check a unit in the same class, find a same-class replacement by model number.

The running cost is not stated in this text. It depends on your state's average residential gas price, so the page computes it from your ZIP. Multiplying 176 therms by that price gives the yearly cost at the high draw pattern; the cost calculator on your own ZIP does this step. The 6 therms gap to the 182 therms class median becomes a cost difference only at your own rate. Its size is not known until that rate is entered. The installed-cost range shown in its own block on this page is a modeled range with its own source and date. It is not a quote, and it does not change the energy figure or the rank.