Document jNzqmaONe3Y59JqEJ96qabZ2

C. C Shipp & Company Heating and Humidifying Unit, Air AMERICAN AUTOMATIC VENTILATORS Diameter Inches 10 12 14 16 18 20 22 24 26 28 30 32 34 36 33 40 42 44 48 50 52 54 56 58 60 Area in Sq. In. 78 113 153 201 254 314 380 452 530 615 706 804 907 1017 1134 1256 1385 1520 1661 1809 1963 2123 2290 2463 2642 2827 Shipping Weight 20 25 35 45 48 60 70 78 94 110 140 155 165 197 225 250 275 300 350 378 400 425 450 500 575 660 . List Price $23.24 28.24 33.74 43.74 45.00 46.88 51.24 54.38 61.24 65.00 68.74 81.24 87.50 92.50 112.50 125.00 130.00 142.50 152.50 162.50 175.00 . 187.50 '200.00 217.50 230.00 245.00 Note.--Furnished in galvanized iron only unless otherwise ordered. Base extra. AMERICAN STATIONARY VENTILATORS Diameter Inches 12 16 16 24 30 48 54 60 Area - in Sq. In. 113 153 201 254 314 380 706 1017 1385 1809 2290 2827 . Shipping Weight 40 50 ' 60 70 90 100 150 210 350 450 570 700 list Price * 7.12 10.24 15.74 19.36 25.00 31.24 42.50 67.50 90.00 115.00 137.50 168.74 Note.--American Ventilators are received by all transportation companies under Classification One, double rate. Copyrighted, 79*7, C. C: Shipp & Company METHOD OF CALCULATION FOR D-I SANITARY VENTILATING AND HUMIDIFYING UNITS The following method of calculation for amount of air required is based on State requirements of Indiana, and will naturally vary in states where the requirements are different; However, the general principles of the method will apply to all cases. 1. The amount of Direct Radiation installed, which is not enclosed with the 492 C. C. Shipp & Company Healing and Humidifying Unit, Air, Air Diffusers, is that required for the ex posed wall and glass. This Radiation is determined in the following manner: 2. Multiply square feet of glass surface in room by 89, if from zero to 70 deg.; or by 99 if from --10 deg. to 70 deg. 3. Multiply the net wall by 27, if from zero to 70 deg., or by 37 if from --10 deg. to 70 deg. 4. Add results of 2 and 3, and divide by 250. This will give you the square ieet of direct radiation necessary to overcome heat losses through glass and walls, which in the average school room is 120 to 140 sq. ft. Add 10 per cent to above figures for north or west exposures. 5. To determine the number of Wall Boxes required, first determine the number of pupils for the room. This can be ob tained by dividing the cubical contents of the room by 225 (allowing 225 cu. ft. of contents per pupil). 6. Multiply the number of pupils by the amount of air required for each pupil per minute, which, for Indiana, is 30. Thisgives the total amount of the air required for the room per minute. 7. Divide the total amount of air re quired per minute by the capacity of the Wall Box to determine the number of boxes required. 8. Example: Assemble a room designed for 34 pupils; then, 34 X 30 (cu. ft. of air per minute per pupil) equals 1020 cu. ft. per minute; 1020 c.f.m. divided by 300 (capacity of 8 x 30 in. Wall Box) equals 3.4, or it will be necessary to use four 8 x 30 in. Wall Boxes. 9. Therefore, there will be required in the room four radiators, with a Wall Box for each radiator. Since, when , using an 8 x 30 in. Wall Box, twelve sections of 3-column 38 in. radiator are enclosed by the air diffusers, there will be 60 sq. ft., of radiation enclosed in each radiator, or a total of 240 sq. ft. for ventilation. 10. To the preceding amount must be added the direct radiation required for wall and glass. Assume this to be 120 sq. ft. There would then be a total of 240 'sq. ft. plus 120 sq. ft., making 360 sq. ft. in the room. . 11. In designing the boiler, take special notice that the 240 sq. ft. of indirect radia tion, or those sections enclosed in the Air Diffusers will condense two and one-half times as much steam as ordinary direct radiation. Therefore, the four radiators in the room will be equivalent to 2^ X 240 = 600 -f- 120, or a total of 720 sq. ft. of direct radiation. 12. If the building is an eight-room school house, it will require 8 X 720 plus' whatever direct radiation there may be required in the halls, toilets, offices, etc. 13. Say there are 500 sq. ft. of radiation in the halls, etc. Then 8 X 720 -- 5760 sq. ft.; 5760 sq. ft. + 500 sq. ft. = 6260 sq. ft. The size of the boiler, together with the supply and return piping, should be based on an equivalent of 6260 sq. ft. of radia tion, making due allowances for mains and risers. We recommend, on account of better air distribution, the use of four Wall.Boxes for the ordinary class room, the size de pending, of course, upon the requirements. Do not use tube radiation. Do not use radiation less than 26 in. high. All Ventilating Radiators should be legless. Ventilating Radiators for one pipe steam should be tapped 1^ in. up to 70 sq. ft., inclusive, all above 70 sq. ft. 2 in. Ventiiating Radiators for two-pipe steam should be tapped 1^ in. Each class room should be provided with a suitable foul air vent-flue, constructed on the opposite side of the room from the ventilating radiators. The size of this foul air vent-flue is based upon the number of pupils in the room. The State oif Indiana requires 16 sq. in. in the foul air vent-flue for each pupil. Aspirating Radiators should be installed in each foul air ventflue, allowing sq. ft. per pupil on the first floor and J4 sq* ft* on the second floor. AH Foul Air Ventilating Flues should be connected to a foul air collecting chamber or chambers constructed in attic. The size of collecting chamber or chambers should be 10 per cent larger than the combined free area of all ventilating flues connecting into same. The foul air collecting cham ber or chambers should be connected to a revolving automatic ventilator on the roof of the building of sufficient size and ca pacity to meet all requirements. In determining size of American Auto matic Ventilator one-half sq. in. free area in ventilator should be allowed to each one sq. in. of free area in foul air vent-flue. Copyrighted, 1997, C. C. Shipp & Company 493