Table 22 Outside Surface Resistance (Table A3.6 CIBSE Guide)
|
Surface resistance for stated exposure
|
|
Building
element
|
Emissivity
of surface
|
(m²K/W)
|
|
|
|
Sheltered
|
Normal
|
Severe
|
|
Wall
|
High
|
0.08
|
0.06
|
0.03
|
|
|
Low
|
0.11
|
0.07
|
0.03
|
|
|
|
|
|
|
|
Roof
|
High
|
0.07
|
0.04
|
0.02
|
|
|
Low
|
0.09
|
0.05
|
0.02
|
Notes:
1 Form (shape) factor for radiative heat transfer is taken to be unity
2 High emissivity is taken as 0.9, low emissivity is taken as 0.05.
