Fogatti FDG-CF170

The 206 therms figure comes from this site's own calculation, not from the registry. 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 this model the UEF is 0.82, measured at the high draw pattern. The annual figure holds only at that test draw. A household that draws a different amount of hot water will use a different amount of gas. The registry data comes from DOE CCD, retrieved 2026-09-19. Each step of the calculation is set out in how this site calculates the annual figures.

The high draw pattern represents a larger household, or one where showers and laundry overlap. That is the use the 206 therms figure describes. The registry lists this unit's maximum flow rate in gallons per minute as 4.2. Among the 397 gas tankless models at the high draw pattern, it ranks 229th lowest energy use. That places it in the second-highest quarter of its class for energy use. In other words, more than half of the registered models in this class use less energy under the same test. You can look up other models in this class with the same-class replacement search by model number.

Running cost is not given in this text. It depends on your state's average residential gas price, which the page looks up from your ZIP. The running-cost calculator for your own ZIP works out the cost using that rate. If your household uses less hot water than the high draw pattern assumes, your gas use will be lower than 206 therms. If it uses more, your gas use will be higher. This page does not have energy figures for this model at other draw patterns. The installed price range appears in its own block, with its source and date. That range is a modeled installed-cost estimate, not a quote.