Household size | Tank size |
1-2 | 26-36 gallons |
2-4 | 36-46 gallons |
3-5 | 46-56 gallons |
5 or more | 56 or more gallons |
Type of water heater | Energy savings vs. minimum standards | Expected energy savings over equipment lifetime |
High-efficiency tank systems | 10-20% | Up to $500 |
Tankless (gas or electric) | 45-60% | Up to $1,800 |
Heat pump | 65% (compared to electric resistance) | Up to $900 |
Solar with electric backup | 70-90% | Up to $2,200 |