Campervan Night Condensation Dew-Point, Vapour Load & Roof-Fan CFM Balancer

Deterministic Magnus-Tetens psychrometric saturation vapor pressure + steady-state cabin moisture mass-balance & sensible ventilation heat-loss solver engine (.json, .csv) built for Maxxair MaxxFan, Dometic Heki, Thinsulate 3M, Armacell Armaflex — zero-upload ephemeral Wasm RAM execution.

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