VESTA VRP-199

This site calculates the 178 therms figure; the registry does not publish it. The calculation combines the model's UEF, the ratio of hot water delivered to energy used, with the daily hot-water draw set by the DOE test for the high draw pattern. For this model, the DOE CCD lists a UEF of 0.95, retrieved 2026-09-19. The test fixes the draw, so the figure shows how the unit performs under that load, not in a particular home. A household that uses more hot water than the test assumes would burn more gas. A household that uses less would burn less. This page does not know how far your own use differs from the test draw. The steps are set out in how the annual energy and running cost are calculated.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. In that class, the VESTA VRP-199 has the 45th lowest energy use of 397 models. It uses 4 therms less than the 182 therms class median. The registry also lists a maximum flow rate in gallons per minute of 5.7. That is the highest flow the unit is rated to deliver at once. For a smaller household that draws less hot water, this page has no figure. Energy use for this model at other draw patterns is not available here. To compare it with other units at the same draw pattern, use the same-class replacement finder by model number.

The running cost does not appear in this text because it depends on your gas rate. The page multiplies the 178 therms of natural gas by your state's average residential gas price. It finds that price from your ZIP. Readers in different states will see different costs for the same unit. The value of the 4 therms gap to the class median also changes by state. To work out the cost on your own ZIP, use the water heater running-cost calculator. The installed price range has its own block on the page, with its source and date. It is a modeled range, not a quote from an installer.