Question

9) Determine the U-value for the following wall section composed of three 1. Hardboard, 1/4-inch thick 2. Expanded polystyrene, 2-inches thick 3. Plywood, 3/4-inch thick Resistances (R) of the materials per inch in FPS units R of inside air = 0.68 R hard board = 0.18 R of expanded polystyrene = 4.00 R of Plywood = 1.25 R Outside air = 0.17​

Answer 1

Answer:

Determine the U-value for the following wall section composed of three 1. Hardboard, 1/4-inch thick 2. Expanded polystyrene, 2-inches thick 3. Plywood, 3/4-inch thick Resistances (R) of the materials per inch in FPS units R of inside air = 0.68 R hard board = 0.18 R of expanded polystyrene = 4.00 R of Plywood = 1.25 R Outside air = 0.17