What's New in v1.0.1:

• R-454B & A2L refrigerant support — ready for the 2025 phase-out
• Enhanced PT chart with bubble/dew pressure glide display
• Superheat & subcooling with target-range diagnostics
• Duct sizing (equal-friction method) and Manual J load estimates
• Psychrometrics: dew point, wet bulb, enthalpy
• Full unit converter: °F/°C, PSIG/kPa, CFM/m³·h, BTU/kW
• History with notes, pinning, and PDF export
• 100% offline — no internet needed in the field

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