=+5-18.

A wall exactly like the one described in Table 5-4a, construction 1, has dimensions of 15 x 3 m.

The wall has a total window area of 8 m2 made of double-insulating glass with a 13 mm air space in an aluminum frame without thermal break. There is a urethane foam-core steel door without thermal break, 2 x 1 m, 45 mm thick. Assuming winter conditions, compute the effec-

tive overall heat-transfer coefficient for the combination.