Grade

Thermal conductivity

Insulation type

W/mK

kcal/mh∙˚C

Note

A

0.034 or lower

0.029 or lower

-XPS (Extruded Polystyrene Board) outstanding type, type 1, type 2, type 3

-EPS (Expanded Poly Styrene) class 2 (Neopor) No. 1, No. 2, No. 3, No. 4

-Rigid polyurethane foam Class 1 No. 1, No. 2, No. 3 and Class 2 No. 1, No. 2, No. 3

-Glass Wool insulating board 48 K, 64 K, 80 K, 96 K, 120 K

-Thermal Conductivity is 0.034 W/mK (0.029 kcal/mh∙˚C) or lower as other insulations.

B

0.035 - 0.040

0.030 - 0.034

-EPS (Expanded Poly Styrene) class 1 No. 1, No. 2, No. 3

-Mineral Wool No. 1, No. 2, No. 3

-Glass Wool 24 K, 32 K, 40 K

-Thermal Conductivity is 0.035 - 0.040 W/mK (0.030 - 0.034 kcal/mh∙˚C) as other insulations.

C

0.041 - 0.046

0.035 - 0.039

-EPS(Expandable Poly Styrene) class 1 No. 4

-Thermal Conductivity is 0.041 - 0.046 W/mK (0.035 - 0.039 kcal/mh∙˚C) as other insulations.

D

0.047 - 0.051

0.040 - 0.044

-Thermal Conductivity is 0.047 - 0.051 W/mK (0.040 - 0.044 kcal/mh∙˚C) as other insulations.