To reduce the energy consumption associated with domestic hot water by improving the efficiency of the water heater.
Install an ENERGY STAR–qualified water heater (1 point), or install a solar water heater that, in combination with an ENERGY STAR water heater, meets at least 40% (2 points) or 60% (3 points) of the annual domestic hot water (DHW) load (Table 1).
Table 1. Points for high-efficiency water heater
|ENERGY STAR water heater||1|
|EF or thermal efficiency greater than 0.9
EF or thermal efficiency greater than 1.8
|Solar water heaters|
|Solar water heater: ≥ 40% of annual DHW load||2|
|Solar water heater: ≥ 60% of annual DHW load||3|
Projects outside the U.S. may use a performance equivalent to ENERGY STAR.
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