Document jq8Dz0KGo92jjYo7yyNwDyXN

American Society of Heating and Ventilating Engineers Guide, 1928 Table 2. Climatic Conditions Compiled from U. S. Weather Bureau Records Col. A CoL: B Col. C Col. D Col. E Col. F State. City Average Temp., Oct. 1st- May 1st Lowest Tempera ture Average Wind Vel ocity Dec.. Jan., Feb.. Miles per Hr. Direction of Prevail ing Wind, Dec., Jan., Feb. Ala Ark. Pal ...... nr Fla Pa in. Ky Me-- ........... Md.................. Mich.._........... Minneapolis....................................... Mo N. H............... N. I................. NV New York. ....................................... N. M............... Santa Fe............ ,,........ ..................... 57.7 53.9 59.5 34.9 49.5 51.6 54.3 58.6 39.3 39.2 38.0 43.2 61.9 51.4 58.4 42.5 36.4 36.4 39.9 40.2 44.1 33.9 32.1 38.9 40.2 45.2 61.5 56.2 31.1 33.6 43.6 37.6 29.1 35.4 27.6 25.1 29.6 56.0 40.3 43.3 . 43.0 34.7 27.7 37.0 34.6 39.6 37.9 33.4 41.6 35.1 34.7 40.3 38.0 --1 -10 16 -25 -15 -12 29 28 -29 -16 -14 -15 10 -8 8 -13 -20 -23 -24 -25 -15 -32 -35 -25 -26 -20 7 -5 -23 -17 -7 -13 -27 -24 -27 -41 -33 -1 -24 -22- -29 -49 . -57 -29 -35 . -7 -28 -35 -7 -24 -14 -6 --13 8.3 8.6 3.9 6.7 8.0 9.9 7.4 5.6 9.3 7.3 8.2 11.8 8.3 4.7 9.3 17.0 10.2 11.8 8.4 6.1 12.2 7.3 10.4 9.3 9.6 7.7 13.8 10.1 7.2 11.7 11.3 13.1 11.4 11.1 11.5 7.6 9.1 11.8- 11.3 8.7 10.9 910 9.9 9.5 6.0 10.6 7.9 17.7 13.3 7.3 N N E SW E NW N NE S SE N NW NE NW NW E SE SW NW S S NW NW N NW SW N SE W NW NW W W SW NW SW NW SE NW NW SE W SW N W SE NE NW NW S W' NW NE e 6 Chapter I--^Calculating the Heat Losses from Buildings Table 2. Climatic Conditions Compiled from U. S. Weather Bureau Records-- (Continued) Col. A State Col. B City Col. C Average Temp.. Oct. 1stMay 1st Col. D Col. E Col. F Lowest Tempera ture Average Wind Vel ocity Dec., Jan., Feb., Miles per Hr. Direction of Prevail ing Wind. Dec., Jan., Feb. Nr Nn Wilmington. .................................. Devil's Lake. ,,.............................. .Columbus........................................... Pa 1? I ; r S D. Tenn............... Portland........... ................................. Pittsburgh...... ................................... Columbia........................................... Rapid City....;............................... -- Knoxville........................................... Memphis. ...i................................... Fort Worth............--..............--...... San Antonio.............................-........ Vt. Va. Wash.. ......... Salt Lake City. ...................... Lynchburg......................................... Richmond.......................................... Seattle................................................. W. Va...........Wis. .. . .. Wyo........... - Parkersburg....... ,.............. ............... La Crosse..........................:................ Milwaukee......................................... Sheridan............................................. Lander. ............................................ 49.7 53.1 24.5 18.9 36.9 39.9 48.0 34.1 45.9 41.9 40.8 37.6 56.9 53.7 28.1 32.3 47.0 50.9 53.0 54.760.7 38.1 40.0 29.3 49.1 45.2 47.4 45.3 37.5 38.8 41.9 28.6 31.2 33.0 31.0 28.9 -2 5 -45 -44 -17 -20 -17 -20 -2 -6 -20 -9 7 -2 -43 -34 -16 -9 -2 -8 4. -24 -20 -27 2 -7 -3 3 -30 -21 -27 -36 -43 -25 -45 -36 7.3 8.9 11.4 14.5 9.3 12.0 6.0 6.5 11.0 13.7 14.6 11.0 8.0 11.5 7.5 6.5 9.6 10.5 11.0 8.2 8.9 4.9 12.9 9.0 5.2 7.4 9.1 4.8 6.6 12.8 5.6 11.7 5.3 3.0 SW SW NW w SW SW N SE S NW NW NW N NE NW W SW NW NW NW N W SE S N NW S SE SW W S SW NW W NW NE material depends on the structure of the material and its density. Heavy or dense materials, the weight of which per cubic foot is high, usually transmit more heat than light or less dense materials, the weight of which per cubic foot is low. Transmission Coefficients By means of suitable tests on an actual wall construction, heat trans mission coefficients (Table 6) may be determined directly, or they may be computed if certain physical constants are known. If tests are made to determine heat transmission coefficients, the inside and outside air temperatures should correspond with those actually existing in heating practice, and the amount of air movement, both on the inside and outside -of-the test wall, should be definitely stated in reporting the coefficients. 7