This calculator is designed to provide a side-by-side economic comparison of different water heater units.
The default values below are based on national average data, but you can input your estimated daily water use in gallons, along with your fuel prices, then select the types of water heaters you’re interested in from the drop-down menus and enter the estimated installed costs of the units (this information can usually be obtained by talking with a contractor).
If you’re not sure what your typical daily hot water use is, here are some general guidelines you can use to come up with an estimate:
- Average 10-minute shower: 20 gallons
- Average faucet flow: 2 gallons/minute
- Average clothes washer, per load: 10 gallons
- Average dishwasher, per load: 6 gallons