Water Heater Calc Plumb

BTU & Recovery Calc

$0.99 · In‑App Purchases · Designed for iPad. Not verified for macOS.

Water Heater Calc Plumb - professional NEC calculator for electricians. Offline, permit-ready. Water Heater Sizing Calculator helps you calculate required BTU/hour capacity for any water heating application. Instantly determine heater size for gas (natural gas or propane), electric, or heat pump water heaters based on flow rate and temperature rise. Support efficiency percentages for fuel types: 80% for natural gas/propane, 95% for electric resistance, 250% COP for heat pump systems. Works 100% offline on the job site. Designed for sizing water heaters to meet simultaneous hot water demand. FEATURES - 4 Fuel Types: Natural gas (80% efficiency), propane (80% efficiency), electric resistance (95% efficiency), and heat pump systems (250% coefficient of performance) - Temperature Input: Fahrenheit or Celsius selection for global compatibility - Flow Rate Support: GPM (US gallons per minute) and L/min input options - Temperature Rise Calculation: Automatic calculation from inlet and outlet temperatures - kW Conversion: Automatic kilowatt conversion for electric heater sizing - Simultaneous Demand: Account for multiple hot water draws simultaneously - Code Note: Result shows the GPM x deltaT x 500 basis and the fuel efficiency applied HOW IT WORKS 1. Select fuel type (natural gas, propane, electric, or heat pump) 2. Enter water flow rate (GPM) required by fixtures 3. Enter inlet and outlet temperatures or temperature rise 4. App calculates required output BTU/hour and the fuel-adjusted input BTU/hour 5. Export sizing recommendation to PDF for equipment selection PERFECT FOR - Plumbers and HVAC technicians sizing water heaters - Plumbing contractors and estimators - Mechanical engineers designing hot water systems - Home builders selecting appropriate equipment - Facilities managers replacing water heaters - Plumbing inspectors verifying system design OPTIONAL PRO UPGRADE — $2.99 ONE-TIME IN-APP PURCHASE The following features require a separate one-time in-app purchase. They are not required to use the calculator: • Unlimited saved calculation history • PDF export of results • Dark theme • Ad-free experience STANDARDS & COMPLIANCE Standard BTU/h formula: BTU/h = GPM x Temperature Rise (°F) x 500 / Efficiency, Fuel efficiency ratings per manufacturer specifications (80% gas, 95% electric, 250% COP heat pump), Energy Factor (EF) calculations for comparing heater models, Standard residential hot water demand per ASHRAE guidelines. PERFECT FOR - Plumbers and HVAC technicians - Mechanical engineers and estimators - Plumbing contractors - Home builders and renovators - Facilities and building managers - Plumbing inspectors OFFLINE & PRIVACY - Works 100% offline - calculate heater sizes anywhere - No account required - instant access without signup - No data collection - all calculations stored locally - No internet dependency Part of PlumbTools Suite - professional plumbing and HVAC calculator tools. Calculate water heater BTU requirements accurately, select right-sized equipment, and meet simultaneous hot water demand with precise heater sizing.

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What's new: - L/min flow input with automatic conversion to GPM - The result shows the sizing basis (GPM x deltaT x 500) and the fuel efficiency applied

Version 1.0.5

The developer, Rizvan Adzhoian, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Rizvan Adzhoian
Size
  • 34.9 MB
Category
  • Utilities
Compatibility
Requires iOS 13.0 or later.
  • iPhone
    Requires iOS 13.0 or later.
  • iPad
    Requires iPadOS 13.0 or later.
  • iPod touch
    Requires iOS 13.0 or later.
  • Mac
    Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
18+
In-App Purchases
Yes
Copyright
  • © 2026 Rizvan Adzhoian
  • Developer Website
  • Privacy Policy

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