Hot-Water Recirculation Loop Slab Heat-Loss & Smart Pulse-On-Demand Sizer

Deterministic Cylindrical pipe-in-slab steady/transient radial conduction + plug-flow transit time (V_pipe / Q_pump) thermal decay engine (.json, .yaml, .pdf) built for Grundfos Comfort, Viega, Uponor, Shelly — zero-upload ephemeral Wasm RAM execution.

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