Richmond PROG40-36P RH67 PV

This site calculates the 163 therms figure. The registry does not state it. The calculation 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 medium draw pattern. This model's UEF is 0.68. The inputs come from the DOE CCD, retrieved 2026-09-19. The page on how the annual cost is calculated explains each step. The model ranks 5th lowest for energy use among the 288 gas tank models at the medium draw pattern. The figure holds only at the test's daily draw. A household that uses more or less hot water will burn a different amount of gas. This page has no way to measure that amount, so it does not give one.

The model's first hour rating, the gallons of hot water available in the first hour from a full tank, is 71 gallons. The rated volume is 38 gallons. The rating covers a home whose busiest hour stays within 71 gallons of hot water and that has a natural gas supply. A home whose busiest hour needs more than 71 gallons falls outside what this rating describes. A home without natural gas is also outside it, because the 163 therms figure applies only to that fuel. If fuel, space or size do not match, the water heater selector by fuel, space and size lists other registered models. To look for a unit in the same class as this one, use the same-class replacement search by model number.

This text gives no running cost, because the cost depends on your state's average residential gas price. The page calculates it from your ZIP instead, using the 163 therms figure at the medium draw pattern. The difference from the class works the same way. At the test's draw, this model uses 22 therms less gas a year than the class median of 185 therms. What that difference is worth depends on your gas rate, so this text gives no fixed amount for it. The running-cost calculator for your own ZIP applies your rate to the annual figure. The installed price has its own block on the page, with its source and date. It is a modeled installed-cost range, not a quote, and this text does not repeat it.