Layer

Material

Thermal Resistance

(m² K/W)

Thickness (m)

Conductivity: λ

(W/m/˚C.)

Cap.Cal: C

(J/kg・˚C)

Density: ρ

(kg/m³)

1.

2

3

Sheet metal

Airspace

Wood

-

0.180

-

0.002

0.400

0.005

70

-

0.100

800

100

990

7000

1000

1200