Hybrid Gagge + ISO 7933 heat strain model with population stratification for occupational and sedentary heat stress assessment

Open-source heat-strain modelling for sedentary people, workers and athletes. Couples ISO 7243 WBGT screening with a validated thermoregulatory engine (Gagge 2-node · ISO 7933 PHS · JOS-3) — and states plainly where each model is NOT valid. Runs entirely in your browser: no server, no data leaves your device.