Document BRpO8wDO630BbQ9N8ad1DQ07L

American Society of Heating and Ventilating Engineers Guide, 1925-26 of the chimney. The chimney shall be high enough so that the wind from any direction shall not strike the top of the chimney from an angle above the horizontal. The chimney shall be properly capped with stone, terra cotta, concrete, cast-iron, or other approved material; but no such cap or coping shall decrease the flue area. The size or area of flue lining or of brick flue depends on height of chimney and capacity of heating system. For chimneys not less than 35 ft. in. height above grate line, the net internal dimensions of lining should be at least 7 x 11J4 >n- for a total leader pipe area up to 790 sq. in. Above 790 and up to 1000 sq. in. of leader pipe area the lining should be at least 11M x llM in. inside. In case of brick flues not less than 35 ft. in height with no linings, the internal'dimensions should be Fig .55. Elevation of the Warm Air Research Residence at least 8 x 12 in. up to 790 sq. in. of leader area, and at least 12 x 12 in. for leader capacities up to 1000 sq. in. Chimneys under 35 ft. in height are often unsatisfactory in operation and hence should be avoided. TYPICAL EXAMPLE \ The application of the preceding data to an actual example may be of assistance to the designer. Figs. 55, 56, 57, 58 and 59,* represent the plans of the Warm Air Research'Residence of the National Warm Air Heating and Ventilating Association recently erected at the University of Illinois. Assuming all air recirculated, the minimum furnace for the plant will be: Grate Area = 0.0034 X 132,370 = 450 sq. in. = 24 in. diam. at 175 deg. register temperature. (7). Grate Area = 0.0040 X 132,370 = 530 sq. in. = 26 in. diam. at 160 deg. register temperature. (8) - (10) *Plans used with permission and bath room on third floor not heated at present. 148 American Society of Heating and Ventilating Engineers Guide, 1925-26 If provision shall be made for certain outside air circulation, then increase.the building heat loss by, say 25 per rent and obtain by equation (7) a 27-in. grate and by equations (8) and (10) a 29-in. grate. Summary of Data Applied to Warm Air Research Residence Rooms From Chapter I on Heat Losses from Buildings B.t.u. Heat Losses H Leader Area Sq. In. Stack' Area Leader Sq. In. Diameter 0.7 X LA Inches Stack Size Net Register Size Gross P First Floor Breakfast...... Kitchen......... Hall and stair Second Floor $. W. Bed..... Bath.............. N. Bed.......... Third Floor E. Bed. .... W. Bed.......... 17250 6810 2300 9210 25710 12570 15030 9800 2450 14800 8220 8220 II (N iO S wH 83 230 113 = 0.0067/ 90 59 15 89 = 0.005H 41 41 . 63 41 10 62 29 29 14 9 8 11 or 12 Two 12 12 ......... 14 X 18 8 X 12 8 X 10 12 X 14 Two 12 X 14 12 X 14 11 or 12 5 X 12 9 3M X 12 8 3 X 10 11 or 12 5 X 12 12 X 14 8 X 12 8 X 10 12 X 14 8 3 X 10 8 3 X 10 8 X 10 8 X 10 149