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Table 1 Correction factors for dynamic total thermal insulation (CFi) and evaporative resistance (CFe) of 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

Correction factor Icl ISO7933 [22] ISO9920 [27]
CFi Nude Exp (− 0.472 Var + 0.047 Var2 − 0.342 Vw + 0.117 Vw2) (= CorrIa) …(1.1) Exp (− 0.533 × (Var − 0.15) + 0.069 × (Var − 0.15)2 − 0.462 Vw + 0.201 Vw2) (= CorrIa) …(2.1)
0 < Icl < 0.6 ((0.6 − Icl) × CorrIa + Icl × CorrIT)/0.6 …(1.2) ((0.6 − Icl ) × CorrIa × Ia + Icl × CorrIT × IT(0.6)) / (0.6 × IT(Icl)) …(2.2)
Icl ≥ 0.6 Exp (0.043 − 0.398 Var + 0.066 Var2 − 0.378 Vw + 0.094 Vw2) (= CorrIT) …(1.3) Exp (− 0.281 × (Var − 0.15) + 0.044 × (Var − 0.15)2 − 0.492 Vw + 0.176 Vw2) (= CorrIT) …(2.3)
CFe All range CorrIT/(2.6 CorrIT2 − 6.5 CorrIT + 4.9) …(3)
(If imdyn = imst × (2.6 × CorrIT2 − 6.5 × CorrIT + 4.9) > 0.9, then imdyn = 0.9)
Exp (− 0.468 × (Var − 0.15) + 0.080 × (Var − 0.15)2 − 0.874 Vw + 0.358 Vw2) …(4)
0.3 − 0.5 × CorrIT + 1.2 × CorrIT2 …(5)
  1. Ia thermal insulation of air layer in nude, Icl intrinsic thermal insulation of clothing, Var relative air velocity, Vw walking speed, IT(0.6) static total thermal insulation at 0.6 clo, IT(Icl) static total thermal insulation at Icl, CorrIa correction factors for dynamic thermal insulation in nude, CorrIT correction factors for dynamic total thermal insulation over 0.6 clo of Icl, imst static moisture permeability index, imdyn dynamic moisture permeability index