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Table 2 Ranges of validity for ISO 7933 [22] and ISO 9920 [27]

From: Comparison of correction factor for both dynamic total thermal insulation and evaporative resistance between ISO 7933 and ISO 9920

Parameter ISO 7933 [14] ISO 9920 [27]
Ta 15–50 °C -
Tr–Ta 0–60 °C -
M 52–232 W·m−2 -
Var 0.0–3.0 m·s−1 0.15–3.50 m·s−1
Vw 0.0–1.5 m·s−1 0.0–1.2 m·s−1
Icl 0.1–1.0 clo 0.0–1.4 clo
  1. Ta air temperature, Tr mean radiant temperature, M metabolic rate, Var relative air velocity, Vw walking speed, Icl intrinsic thermal insulation of clothing