HVACDiagnostics & Troubleshooting3MediumContractor$ implied
Uncertainty about the science and practical outcomes of using oversized ducts with a smaller HVAC unit.
No accessible, authoritative source that explains the underlying physics (e.g., airflow velocity, thermal losses) and provides clear decision criteria for when oversized ducts are acceptable vs. problematic.
47
0
Opp. Score
47
Severity
3Medium
Willingness to Pay
implied
Added
May 4, 2026
Workarounds Described
- relies on anecdotal experience from other contractors
- tries to reason based on conservation of mass manually
Implied Software Gaps
- HVAC airflow simulation and duct sizing app that provides instant, science-based validation for duct reuse decisions
App Concept
DuctFlow Analyzer
A mobile app that uses simple room dimensions and duct specs to simulate airflow velocity, friction loss, and thermal impacts. It gives a clear go/no-go recommendation for reusing oversized ducts with downsized units, backed by HVAC science.
Key Features
- Input existing duct dimensions and new unit specs to calculate velocity, pressure drop, and temperature loss
- Visualize airflow behavior with charts and color-coded warnings
- Provide plain-language explanations of the physics behind each calculated parameter
- Generate shareable reports to justify duct replacement or retention to clients
Target Users: HVAC contractors and technicians in residential and light commercial service, particularly those handling system changeouts or retrofits
Revenue Model: $19.99 one-time app purchase with optional $9.99 annual updates for code compliance changes
Part of App Idea
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