EEMAX ECO 11

The figure of 642 kWh is computed by this site, not published by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, of 0.92 with the DOE test's daily hot-water draw for the very small draw pattern. The fuel is electricity, and the source is DOE CCD, retrieved 2026-09-19. The comparison group is the 271 models registered as an electric tankless unit at this draw pattern, and its median is 615 kWh. This model sits 27 kWh above that median. Its rank of 249th lowest energy use of 271 places it in the highest quarter of its class for energy use.

The very small draw pattern covers small units, such as a single bathroom or a point-of-use heater under a sink. The EEMAX ECO 11 is registered at that pattern, so the 642 kWh figure applies only to that kind of use. Its maximum flow rate in gallons per minute is 1.2. The registry data used here gives no energy figure for a larger draw pattern, so that value is not available for this model and is not estimated. If your use is larger than a single bathroom or a sink, the figure above does not describe it. The water heater selector filters by fuel, space and size, and the same-class replacement finder searches by model number.

Running cost is not written here because it depends on your own utility electricity rate, and no rate is assumed. The cost calculator takes your ZIP and applies the local tariff to the 642 kWh figure. The calculation method explains how the annual cost is worked out. This model is 27 kWh above the 615 kWh class median, so a model at the median would use that much less electricity a year at the same draw pattern. The cost of that difference scales with your rate. The modeled installed-cost range appears in its own block with its source and date and is not repeated in this text.