eyoo EA65EH

This site computed the 135 therms figure; the registry does not state it. The calculation uses the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for the medium pattern. This model's UEF is 0.82. The source is the DOE Compliance Certification Database, retrieved 2026-09-19. DOE bases the medium pattern on a typical mid-sized household with a busy morning of hot-water use. A home that draws more hot water than the test will use more gas than 135 therms a year. A home that draws less will use less. This page does not have any home's actual draw. The page on how the annual cost is calculated sets out each step of the method.

The class here is the 80 models registered as a gas tankless unit at the medium draw pattern. Their median is 135 therms a year. This model sits 0 therms from that median, so its energy use equals the median. It ranks 32nd lowest energy use of 80, which places it in the second-lowest quarter of its class. The unit lists a maximum flow rate in gallons per minute of 3.9. The energy figure applies to homes whose daily demand is close to the medium pattern. Homes with heavier demand should not treat 135 therms as their own use. A plumber or seller checking a swap can find a same-class replacement by model number and compare it with the same 135 therms median.

This text does not give a running cost. The cost depends on the reader's state average residential gas price, applied to 135 therms a year. The page works it out from the reader's ZIP instead of using one national figure. To see the figure for the eyoo EA65EH, enter a ZIP in the cost calculator on your own ZIP. This model's use equals the class median of 135 therms. At any given gas rate, its cost will therefore match the cost of a model at the median. The installed price range sits in its own block on this page, with its source and date. That range is a modeled installed cost, not a quote, and this text does not repeat its figures.