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For questions 9-12: outdoor temperature is-20F and indoor temperature is 68 F.Cakculate losses for a 100 ft x 120ft x 10 ft. high rectangular building (For this problem you may ignore wall thicknesses) 9. Find the total heat loss (BTUH) through the roof assembly with R-33 10. Find the total heat loss (BTUH) through the exterior vertical surfaces with these total building areas: a. Window area 320 SF.U b. Personnel door area 125 SF: 1 steel urethane. c. Overhead door area 80 SF,R 2 d Exterior wall R 21.5 AET A142-Mechanical and Electrical Technology 11. Find the total heat loss (BTUH) through the slab of this building (F, slab factor)- 25
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