Document jqK4O0Zod19QLYb00r8b2b5Q

American Society of Heating and Ventilating Engineers Guide, 1928 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 11% in. 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 11 % x 11% in. inside. In case of brick flues not less than 35 ft. in height with no linings, the internal dimensions should be Chapter XI--Gravity Warm-Air Furnace Heating If provision shall be made for certain outside air circulation, then increase the building heat loss by, say 25 per cent 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 = 0.00917 17250 155 14 14 X 18 6810 61 '9 8 X 12 Breakfast...... 2300 21 8 8 X 10 Kitchen. ...... 9210 83 11 or 12 12 X 14 25710 230 Two 12 Two 12 X 14 Hall and stair 12570 113 12 12 X 14 Second Floor = 0.00677 Owners.......... 15030 90 63 11 or 12 5 X 12 12 X 14 S. W. Bed..... 9800 59 41 9 3 y2 X 12 8 X 12 Bath.............. 2450 15 10 8 3 X 10 8 X 10 N. Bed...!...... 14800 89 62 11 or 12 5 X 12 12 X 14 Third Floor = 0.00577 E. Bed..._...... 8220 41 29 8 3 X 10 8 X 10 W. Bed......... 8220 41 29 8 3 X 10 8 X 10 Fig 8. 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 jn. 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. 8, 9, 10, 11 and 12,* 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. 208 r Fig. 9. Basement Plan 209