
387Solar Heating and Cooling of Buildings
© 2008 Taylor & Francis Group, LLC
Combined thermal resistance for the studs and insulation (R
comb
) is found as
R
A
R
A
RAA
comb
stud
stud
insulation
insulation stud insu
=+
+
llation
Assume that the studs occupy 15% of the wall area
comb
or
R
comb
2
TABLE 7.7
Heating Load Calculations for Buildings
Heating Load Component Equations 7.67 through 7.70 Descriptions/References
Walls, roof, ceilings, glass
(7.67)
T
i
, T
o
are inside and outside air
temperatures, respectively. U values of
composite section are calculated from the
thermal properties of components given in
the tables ...