ISO 9920:2007

Ergonomics of the thermal environment — Estimation of thermal insulation and water vapour resistance of a clothing ensemble

Publication date: May 30, 2007

General information

Current stage: 90.92 Effective date: Nov 24, 2025

Originator: ISO

Owner: ISO/TC 159/SC 5

Type: International Standard

ICS: 61.020 13.180

Languages: English French

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Status: Published

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Scope

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

PREVIOUSLY

WITHDRAWN
ISO 9920:1995

NOW

PUBLISHED
ISO 9920:2007
90.92 Standard to be revised
Nov 24, 2025

REVISED BY

IN_DEVELOPMENT
ISO/PWI 9920