A wall section has been constructed as shown in the drawing to the right. Assume that the interior temperature, $T_b,$ is $70F$ and that the outside temperature. $T_0$ is $23E.$ The wall comnonents are as shown helows

Required:

Find the weighted average overall coefficient of heat transfer, $U_{\text{e}\text{f}\text{f}\text{,}}$ of this wall section due to the thermal bridging of the wood studs. Estimate the weighted value to two decimals. Estimate all R$-$values to two decimals.

Calculate the sensible heat loss $($Btuh$\}$ through this ${10}^{\text{'}}$ high by ${42}^{\text{'}}$ long exterior wall. Watch the units.

$)=(UAT$ where $U=U-$factor, $A=$ wall area, $T=$ temperature