A HIGH EFFICIENCY HYBRID WATER HEATER
In these systems, most of the heating is done by the heat pump. Heat pumps use a small amount of electricity to move heat instead of generate it.
High Efficiency Hybrid Water Heaters pull heat from the surrounding air and transfer it (at a higher temperature) to the storage tank. Think of it a bit like a refrigerator in reverse.
These hybrid systems are 2–4 times more efficient than either electric or gas-powered water heaters.