=+5-16. A wall is 20 ft (6.1 m) wide and 8 ft (2.4 m) high and has

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=+5-16.

A wall is 20 ft (6.1 m) wide and 8 ft (2.4 m) high and has an overall heat-transfer coefficient of 0.07 Btu/(hr-ft2-F) [0.40 W/(m2-C)]. It contains a solid urethane foam core steel door.

80 × 32 × 14 in. (203 × 81 x 2 cm), and a double glass window, 120× 30 in. (305 × 76 cm).

The window is metal sash with no thermal break. Assuming parallel heat-flow paths for the wall, door, and window, find the overall thermal resistance and overall heat-transfer coefficient for the combination. Assume winter conditions.

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