Suppose the insulating qualities of the wall of a house come mainly from a 4.0-in, layer of

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Suppose the insulating qualities of the wall of a house come mainly from a 4.0-in, layer of brick and an R-19 layer of insulation, as shown in Fig. 14-19. What is the total rate of heat loss through such a wall, if its total area is 240 ft2 and the temperature difference across it is 12Fo?


Brick Insulation (R) (R2) T1 Heat flow
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