What is the total U value of a 40โฒ x 60โฒ foot building with two 8โฒ x 4โฒ windows on each 60 feet wall if the height of the walls is 11 feet tall? (R-value of windows = 2, and R-value of the walls = 8.)
https://www.ncarb.org/sites/default/files/ARE5-Handbook.pdf
Select one of the following: