Mobile Notary Fee Calculator
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Utilities · Business
Water Heater Sizing Calculator
Size a tank or tankless water heater, with the math shown.
Coming soonNot yet released in app stores
Water Heater Sizing Calculator has not been released yet. Its website has the latest details, along with free tools and guides you can use today.
Overview
Water Heater Sizing Calculator is an iPhone app in development for choosing the right water heater. For a tank, it adds up the hot water your busiest hour draws and gives the minimum First Hour Rating to look for. For a tankless unit, it works out the flow and heat input needed at your temperature rise.
Every result shows the steps behind it, and the app works offline on site. The same sizing calculation is available free on the product website.
- Who it’s for
- Homeowners replacing a water heater, and the installers who size them on site for residential jobs.
- The problem it solves
- Tank capacity alone is not the number to compare, and a tankless unit falls short when too many fixtures run at once for the temperature rise it must deliver. Each kind of heater needs its own calculation.
Key capabilities
- Tank sizing by minimum First Hour Rating, from your busiest hour
- Tankless sizing by required GPM, BTU/hr, gas input and electric kW at your temperature rise
- Step-by-step math behind every result
- Works offline on site
- Tank vs. tankless comparison, saved jobs with notes and PDF reports with Lifetime Pro
Screenshots
Free on the Water Heater Sizing Calculator website
Results are planning estimates. Confirm your choice against manufacturer specifications and local codes, and use a licensed professional where required.
Everything else is on the website
Details, guides and support for Water Heater Sizing Calculator live at waterheatersizingcalculator.com.
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