EN ISO 9920:2009

Ergonomics of the thermal environment - Estimation of thermal insulation and water vapour resistance of a clothing ensemble (ISO 9920:2007, Corrected version 2008-11-01) EN ISO 9920:2009

Publication date:   Jan 30, 2010

General information

60.60 Standard published   Jun 3, 2009


CEN/TC 122 Ergonomics

European Norm

13.180   Ergonomics | 61.020   Clothes



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ISO 9920:2007 specifies methods for estimating the thermal characteristics (resistance to dry heat loss and evaporative heat loss) in steady-state conditions for a clothing ensemble based on values for known garments, ensembles and textiles. It examines the influence of body movement and air penetration on the thermal insulation and water vapour resistance. It does not deal with other effects of clothing, such as adsorption of water, buffering or tactile comfort, take into account the influence of rain and snow on the thermal characteristics, consider special protective clothing (water-cooled suits, ventilated suits, heated clothing), or deal with the separate insulation on different parts of the body and discomfort due to the asymmetry of a clothing ensemble.

Life cycle


EN ISO 9920:2007


EN ISO 9920:2009
60.60 Standard published
Jun 3, 2009


Adopted from ISO 9920:2007 IDENTICAL