IREQ is based on the ISO 11079
Note: This is work in progress!!!
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Input parmeters
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The calculation updates Trad. It uses Tair and v_air.
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This calculation updates RH. It uses RH and Tair.
Result
Insulation Required, IREQ
REQUIRED basic clothing insulation (ISO 9920), Icl
Duration limited exposure, DLE
Required recovery time, RT
Wind chill temperature, twc