· According to the U.S. Dept. of Energy, a tankless water heater is more efficient and uses less energy than a conventional water heater, providing a $25 to $107 in annual savings.
· If your hot water use is low (less than 41 gallons per day), a tankless water heater will be 24% to 34% more efficient.
· If your hot water usage is high (about 86 gallons per day), a tankless water heater is 8% to 14% more energy efficient.
· Installing an on-demand unit at each hot water faucet gives an energy savings of 27% to 50%