
MAGCalc: Expansion Vessel
Sizing, pressure and projects
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In-App Purchases
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About
MAGCalc helps heating and HVAC technicians size membrane expansion vessels and prepare precharge and filling pressures.
WATER SIZING
Record system volume, temperature, static height and safety valve pressure. Estimate water expansion and view the next standard vessel size.
INSTALLATIONS AND SCENARIOS
Save named installation projects with location notes. Create and duplicate independent scenarios, select a reference and compare results. Keep input sources and assumptions with each scenario. Share a calculation record containing inputs, results and differences.
German and English. Calculations and local projects work offline.
MAGCalc Pro unlocks manual expansion calculations for glycol, solar fluids and special media through a one-time in-app purchase. Water sizing and project management are available without that additional purchase.
Professional calculation aid: manufacturer data, applicable rules, system design and actual measurements take precedence. Check results against the real installation.
EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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What's New in MAGCalc
1.1.0
October 21, 2026
New installation projects with sources and notes. Save and duplicate water-sizing scenarios, compare against a selected baseline and share full calculation records.
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Subscriptions & In-App Purchases
$3.99
MAGCalc Pro
Unlock solar, glycol & special-fluid calculations


