Ranein RH10K-LPG

The 206 therms figure comes from this site's calculation. The registry does not publish it. 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. This model's UEF is 0.82 in the registry. The annual figure holds only at that test draw. A home that uses more hot water than the test assumes will use more gas, and a home that uses less will use less. The source is DOE's Compliance Certification Database (CCD), retrieved 2026-09-19. The steps behind the figure are set out in how the annual cost is calculated, which also covers the inputs taken from the registry.

The high draw pattern describes a larger household, or one where showers and laundry overlap. For this unit, the registry lists a maximum flow rate in gallons per minute of 4.3. The class it is compared with holds only gas tankless units tested at the high draw pattern. The gap to that class median, given above, puts this model above the class midpoint for energy use. The 206 therms figure does not describe a household much smaller than the high pattern assumes. That household's own yearly use is not available in the registry. A reader who wants to compare this unit with other models in the same class can run a same-class replacement search by model number with RH10K-LPG.

This page does not state a running cost in the text. The cost of 206 therms of natural gas a year depends on your state's average residential gas price. For that reason, the page computes it from your ZIP. The same yearly use at the high draw pattern can cost different amounts in different states. To see the figure at your own rate, use the cost calculator on your own ZIP. The installed-price block on this page shows a modeled range with its own source and date, and it is not a quote. The registry gives no figure for this unit's running cost in a specific home at that home's actual hot-water use, so that value is unknown here.