FRIEDRICH RTG-70XLN-3

UEF, the ratio of hot water delivered to energy used, is 0.82 for this model in the registry. This site did not read the annual figure from the registry. It computed 206 therms of natural gas from that UEF and the DOE test's daily hot-water draw for the high draw pattern, using DOE CCD data retrieved 2026-09-19. The result is 24 therms above the class median of 182 therms. Ranked by energy use, the unit is 229th lowest of 397, which places it in the second-highest quarter of its class. The steps behind the calculation are described on the methodology page for water heater costs.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The 206 therms figure applies only to that pattern, so a household with lighter use should not read it as its own consumption. The maximum flow rate in gallons per minute is 4 for this unit. The registry data used here gives no figure for any other draw pattern, so none is available. Because this unit ranks 229th lowest of 397, other same-class models use less energy at this draw pattern. The water heater selector by fuel, space and size narrows the field, and the same-class replacement finder works from a model number.

Running cost is not stated on this page. It depends on the state average residential gas price, and this page does not estimate that price. The 206 therms of natural gas at the high draw pattern is the quantity to multiply by your own rate. The cost calculator that works from your ZIP does this for you. The modeled installed-cost range is a separate matter. It appears in its own block with its source and date, and it is not a quote. The registry does not record your actual hot-water use. If your daily use differs from the federal test's draw for the high draw pattern, your consumption will differ from 206 therms, and the size of that difference is unknown.