BS EN ISO 9920:2009

Foreword
Introduction
1 Scope
2 Terms and definitions
3 Application of this International Standard
4 Estimation of thermal insulation of clothing ensemble
  based on tables and with values measured on a standing
  thermal manikin
5 Estimation of clothing area factor
6 Estimation of surface (or boundary) air layer insulation
7 Estimation of water vapour resistance
8 Influence of body movement and air movement on the
  thermal insulation and vapour resistance of a clothing
  ensemble
9 Other factors influencing clothing insulation
Annex A (normative) - Thermal insulation values for clothing
                      ensembles
Annex B (normative) - Thermal insulation values for individual
                      garments
Annex C (normative) - Vapour permeability index values for
                      clothing ensembles
Annex D (informative) - Measurement of thermal insulation and
                        water vapour resistance of clothing
                        ensembles on a thermal manikin
Annex E (informative) - Measurement of thermal insulation and
                        water vapour resistance of a clothing
                        ensemble on human subjects
Annex F (informative) - Different expressions for the thermal
                        insulation of clothing
Annex G (informative) - Estimation of the heat exchanges for
                        reflective clothing
Annex H (informative) - Guidance on the determination of the
                        covered body surface area
Bibliography

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.

This International Standard 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.

This International Standard 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.