Wood Fireplace Flue Draft (Pa) vs Kitchen Range-Hood Backdraft CO Guard

Deterministic Stack-effect buoyancy ΔP_chimney = g*H*(rho_out - rho_flue) minus Darcy bend losses vs envelope infiltration Q = C*ΔP^n engine (.pdf, .json, .svg) built for Schiedel, Hoxter, Jøtul, Bora — zero-upload ephemeral Wasm RAM execution.

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