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Ciudad<br />

Minneapolis<br />

Denver<br />

Concord, N.H<br />

Chicago<br />

St. Louis<br />

New York<br />

San Francisco<br />

At<strong>la</strong>nta<br />

Los Angeles<br />

Phoenix<br />

Houston<br />

Miami<br />

TABLA 1-2<br />

PERDIDAS CALORICAS ANUALES PARA TECHOS<br />

POR PIE CUADRADO<br />

PArdida cal6rica a tray~s del Techo<br />

Btu/pie 2 /aho<br />

U=0.19 U = 0.12<br />

Latitud Radiaci6n Grados a = 0.3 a = 0.8 a = 0.3 a = 0.8<br />

So<strong>la</strong>r Dias<br />

Langley's<br />

45"N<br />

40°N<br />

43'N<br />

42N<br />

39N<br />

414l<br />

38"N<br />

325<br />

425<br />

300<br />

350<br />

375<br />

350<br />

410<br />

8,322<br />

6 283<br />

7 000<br />

6 155<br />

4 900<br />

4 871<br />

3 015<br />

35 250<br />

26 794<br />

32 462<br />

27 489<br />

20 975<br />

21 325<br />

10 551<br />

30<br />

22<br />

27<br />

967<br />

483<br />

678<br />

23 590<br />

17 438<br />

17 325<br />

8 091<br />

21<br />

16<br />

19<br />

330<br />

226<br />

649<br />

16 633<br />

12 692<br />

12 911<br />

6 381<br />

18 642<br />

13 496<br />

16 625<br />

14 190<br />

10 457<br />

10 416<br />

4 784<br />

34*N 390 2 903 12 601 9 841 7 619 5 832<br />

34N<br />

470<br />

2 061 4 632 3 696 2 790 2 142<br />

33"N<br />

520<br />

1 765 5 791 4 723 3 487<br />

2 756<br />

30N 430 1 600 6 045 4 796 3 616 2 778<br />

26"N 451 141 259 130 139 55<br />

a es el coeficiente de absorci6n del material de construcci6n<br />

a - 0.3 (b<strong>la</strong>nco)<br />

a - 0.5 (colores c<strong>la</strong>ros cozo el amarillo, verde. etc.)<br />

a - 0.8 (colozr-a obscuroa)

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