Ruud RTG-95XLN-1

The 209 therms figure comes from this site's own calculation, not from the registry. It combines the model'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. The registry lists a UEF of 0.81 for the RTG-95XLN-1, taken from the DOE CCD on 2026-09-19. The result applies only at that test draw. A home that uses more or less hot water each day will use a different amount of gas, and this page does not estimate it. The steps are set out in how the annual energy and cost are calculated.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The RTG-95XLN-1 lists a maximum flow rate in gallons per minute of 4.9. Among the 397 models registered as a gas tankless unit at this draw pattern, it ranks 323rd lowest for energy use. That puts it in the highest quarter of its class for energy use, above the median given earlier. The figure does not apply to a smaller household on a lower draw pattern, and this page has no energy value for that case. If you want lower gas use at the same test draw, look at the models ranked ahead of it. The selector by fuel, space and size and the same-class replacement search by model number can be used to compare them.

This text does not state a running cost. The cost of 209 therms of natural gas a year depends on your state's average residential gas price. The page therefore works it out from your ZIP in the cost calculator for your own ZIP. Your rate also sets what the extra 27 therms over the class median adds each year. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote. This data does not show actual gas use in your home or your own utility bill.