Document 7OmDqQqXVjGv9Epob5JaDd9EV

American Society of Heating and Ventilating Engineers Guide, 1929 Leader diameter = 11.4, say 12 in. Stack area = 0.7 X 90 = 63 sq. in. = say 5 X 12 in. Register area = 90 sq. in. net area. Gross area = 1.6 X net area = 12 X 12 or 12 X 14 in. In like manner the leaders, stacks and registers are calculated for each room in the house. Leaders, Stacks and Registers. {Code Method. See Art. 3, Sec. 1, 2, 3.) Living Room (Glass = 90, Net wall -- 405, Cubic contents = 2405) . L.ead,Cr = (/ 1920 +, 46005 +, W2405 \) 9 = 155 ,n' Register, same as Direct Method. Owner's Room (Glass = 68, Net wall = 394, Cubic contents = 2275) - L,ead,er = ^/ _68 +, 3w94 +, w2275 j\ 6. = ,,90sq. m. Stack and Register, same as Direct Method. 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)" 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 Sq. In. 0.7 X LA Leader Diameter Inches Stack Size Net Register Size ' Gross First Floor Living............ Hall and stair Second Floor Owners........... S. W. Bed___ Bath............ ... N. Bed........... Third Floor E. Bed............ W. Bed.......... 17250 6810 2300 9210 25710 12570 15030 9800 2450 14800 8220 8220 = 0.0097? 155 61 21 83 230 113 = 0.0067? .90 59 15 89 = 0.0057? 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 3H 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 10 180 Chapter. VIII--Gravity Warm-Air Furnace Heating STANDARD CODE REGULATING THE INSTALLATION OF GRAVITY WARM AIR FURNACES IN RESIDENCES' FIFTH EDITION . . March 1, 1928 ARTICLE No. 1.--Meaning of the Term "Gravity Warm Air Furnace Heating System" Gravity Warm Air Heating Systems, to which this code refers, shall consist of one or more warm-air furnaces, enclosed within casings, together with necessary appur tenances thereto, consisting of warm-air pipes and fittings, cold air or recirculating pipes, ducts; boxes and fittings, smoke pipes and fittings, registers, borders, faces and grilles, the same being intended for heating buildings in which they may be installed. ARTICLE No. 2.--Chimneys a. The owner shall provide a chimney for the furnace constructed in a manner to comply with the following specifications. b. The chimney must be absolutely smoke tight throughout its entire length, and must extend at least three feet (3') above a flat roof or two feet (2') above the ridges of peak roofs. c. If built of a single thickness.of brick or of cement blocks, it shall be lined through out its entire length with fire clay flue lining, having not less than three-fourths inch {%") thickness. Flue lining to be laid in mortar and made air-tight. d. The furnace flue must have no other opening for attaching any fireplace, furnace, stove,' range, water heater, gas or ventilating connection. e. If necessary to offset the flue, it must be done in such a manner as not to reduce the cross sectional area or create a ledge or obstruction, where loose material may lodge. /. Its narrowest internal dimension shall not be less than eight inches (8") and no flue smaller than 8' x 8* rectangular or eight inch (8") diameter round will be con sidered suitable when hard coal is to be burned, or 8" x 12" rectangular or ten inch (10") round for soft coal or wood. g. It is strongly recommended that nothing less than 8" x 12" internal dimensions be used in any case. Note 1.--It is recommended that the height above the furnace grate be not less than twenty-six feet (26') . Note 2.--It is strongly recommended that all new chimneys be built in strict accordance with the ordinance recommended by the National Board of Fire Underwriters. (For further data on Chimneys, see Chapter VI). ARTICLE No. 3.--Method for Determining Sizes of Warm Air Pipes, Wall Stacks and Furnaces for Use in Residences Method for Determining Sizes of Basement Warm Aif Pipes Section 1. Each First Floor Room. Divide square feet of glass by 12. Divide square feet of net outside wall by 60. (See Table A) Divide cubic contents by 800, Add together the above and multiply by 9. The result is the area of the basement pipe in sq. in. The sum of: Glass (sq. ft.) (Note 3) +12.) Net Wall (sq. ft.) (Note 4) + 60 f X 9 = Area of Basement Pipe Cubic Contents + 800 , ) Section 2. Each Second Floor Room. Divide square feet of glass by 12. Divide square feet of net outside wall by 60. (See Table,A) 3This Code is approved and issued by authority of the National Warm Air Healing Association, The American Society of Heating a Ventilating Engineers and the National Association Sheet Metal Contractors. First edition, October 1, 1922; 2nd edition,-February 1. 1923; 3rd edition. June 1, 1924; 4th edition. May l, 1927. . 181