How to Calculate Tankless Cost
What is Tankless Cost?
A tankless water heater sizing calculator determines the required flow rate (GPM) and temperature rise to select the correctly sized unit. Flow rate is the sum of all simultaneous hot water uses; a shower (2.5 GPM) + dishwasher (1.0 GPM) requires a unit capable of 3.5 GPM at the required temperature rise.
Step-by-Step Guide
- 1Input base values
- 2System computes results
Worked Examples
Input
Enter the required values
Result
Result computed by the formula
Common Mistakes to Avoid
- ✕Precision loss
- ✕Ignoring variables
Frequently Asked Questions
What does this calculator do?
Input base values
How do I use this calculator?
System computes results
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