1.

The brick wall has an over all dimension of 6m 3m with a 1m 2m window assembly (U-value = 2.5 W/m degC) and a 1m 2.1m door assembly (U-value = 1.25 W/m degC). The overall U-value of the wall (UO) (in W/m degC) is ____

A. 0.5
B. 0..25
C. 5.25
D. 2.3
Answer» E.


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