Table 2 d, e, and f coefficients of materials.

From: A study on optimum insulation thickness of building walls in hot summer and warm winter zone in China

Materials

d

e

f

EPS

9.99E-10

7.10E-08

9.49

XPS

4.36 × 10–10

2.03 × 10–8

7.71

PU

1.63 × 10–9

9.85 × 10–8

9.44

Clay brick

1.35E-10

5.46E-09

11.46

Cement mortar

5.31E-09

2.80E-07

16.76

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