Free, Custom Tankless Water Heater Sizing Calculator
What Size Tankless Water Heater Do I Need?
When determining the right size for a tankless water heater, it’s crucial to match the unit’s capacity with your household’s hot water needs. The best way to do this is by simultaneously calculating the flow rate (in gallons per minute, or GPM) for the appliances you use and ensuring the heater can handle that demand. Our tankless water heater sizing calculator will factor in the GPM required and the temperature rises and recommend a unit that can deliver consistent, energy-efficient hot water on demand.
