Sizing a Water Heater
A properly sized water heater will meet your household's hot water needs while operating more efficiently. Therefore, before purchasing a water heater, make sure it's the correct size.
Here you'll find information about how to size these systems:
- Demand (tankless or instantaneous) water heaters
- Solar water heating system
- Storage and heat pump (with tank) water heaters.
For sizing combination water and space heating systems—including some heat pump systems, and tankless coil and indirect water heaters—consult a qualified contractor.
Don't choose a water heater model based solely on its size. You also need to consider the following: