MARLVEL
  1. v1.3iOS
    This app has been updated by Apple to display the Apple Watch app icon.

updated for 64 bit compatibility
  2. v1.2iOS
    added iPad support
  3. v1.1iOS
    Added aspect ratio for each duct size.

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by HVAC Duct Size Calculator, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

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