Fogatti ET003

The figure of 635 kWh is computed by this site, not published by the registry. It uses the registry's UEF, the ratio of hot water delivered to energy used, of 0.93, together with the DOE test's daily hot-water draw for the very small draw pattern. The source is the DOE CCD, retrieved 2026-09-19, and the fuel is electricity. The figure applies only at that test draw. A household that draws more or less hot water than the federal test would see a different result. The gap to the class median of 615 kWh is 20 kWh a year at the same draw pattern. The methodology page explains how the annual cost is calculated.

This model ranks 218th lowest in energy use among 271 electric tankless units at the very small draw pattern, which places it in the highest quarter of its class for energy use. Its maximum flow rate in gallons per minute is 0.3. The very small draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. The figure of 635 kWh is relevant to that kind of use. It is not relevant to a load that draws more hot water, and a flow above 0.3 gallons per minute is beyond this unit's maximum. For a comparison with other units in the same class, the same-class replacement search by model number lists them.

Running cost is not stated in this text because it depends on your own utility electricity tariff. The annual energy of 635 kWh at the very small draw pattern is the quantity to multiply by your own rate. The cost calculator on your own ZIP does this for you. This page does not estimate a cost or name an amount. Any cost worked out this way keeps the same condition as the energy figure: the federal test's daily draw, not your metered use. The modeled installed-cost range appears in its own block with its source and date. It is a modeled range, not a quote, and it is not repeated here. If the very small draw pattern does not match your use, the selector by fuel, space and size starts from those inputs instead.