Document NGede3ZkmKy2GzRRx4OOX1YLE

C. C., Shipp & Company Heating and Ventilating Unit, Air 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 feet 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. This gives 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 8x% in. Wall Box, twelve sections of a Five Tube 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 2J4 X 240 -- 600 + 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 radiation less than 26 in. high. All Ventilating Radiators shall be arranged for supply and return connection at bottom on opposite ends. All Ventilating Radiator Units used in connection with one pipe gravity steam system to be tapped as follows: 50 to 100 sq. ft. 1J4 in. In no case should the Ventilating Radiator used in connection with the one pipe gravity steam system contain more than 100 sq. ft All Ventilating Radiator Units used in connection with two pipe vacuum steam system tapped as follows, with supply and return connection at bottom of opposite ends: 60 to 90 sq. ft. 1 in. supply and % in. return. Above 90 sq. ft. 1M in. supply and % in. return. 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 of Indiana requires 16 sq. in. in the foul air vent-flue for each pupil. Aspirating Radiators should be installed in each foul air vent- flue, allowing % sq. ft. per pupil on the first floor and sq. ft. on the second floor. All 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. Copyright 1917. 1919. 19SS, 1996. 1997, 1998, C. C. Shipp & Company 656 Heating and Piping Systems Grinnell Company, Inc. Heating, Industrial and Power Plant Piping, Fittings, Hangers, Valves, Pipe Bending, Welding, Piping Supplies, Etc. Executive Offices: Providence, R. I. Offices, Plants and Branches Albant, N. Y. AnANTA, Ga. (Plant and Foundry) Auburn, R. I. (Plant and Foundry) Baltimore. Mo. Dallas, Texas Denver, Colo. Des Moines, Iowa Detroit, Mich. Newark, N. J. New Orleans, La. New York, N. Y. North Charlotte, N. C. (Brandi) Boston, Mass. Buffalo, N. Y. Hartford, Conn. Indianapolis, Ind. Orlando, Fla. Philadelphia, Penna. (Branch) Charlotte, N. C. Chicago, ! (Brandi) Kansas. Crrr, Mo. Kearnt, N. J. (Brandi) - Providence, R. I. (Plant and Foundry) Rochester, N. Y. Cincinnati. Ohio Cleveland, Ohio (Brandi) Columbus, Ohio Milwaukee, Wis. Minneapolis. Minn. (Branch) St. Louis, Mo. Warren, Ohio (Plant and Foundry) GRINNELL COMPANY OF THE PACIFIC Los Angeles, Cal. (Branch) Oakland, Cal. (Brandi) San Francisco, Cal. (Branch) Seattle, Wash Montreal, Que. (Branch) GRINNELL COMPANY OF CANADA, LTD. Vancouver, B. C. (Branch) Toronto. Ont. (Plant and Foundry) Winnipeg, Man. PRODUCTS AND SERVICES-- Complete Service on materials to specification on Power Plant Piping, Industrial Piping, and Industrial Heating Systems; Fabricated piping including bends, welded headers, lap joints and the Grinnell Triple XXX line of products 'for Super Power; Grinnell Equiflo Valve; Grinnell Pipe Hangers and Fittings; Grinnell Thermolier (A new Development in Unit Heaters.) Also Humidifying systems; Con* stant Level Size Circulating System; Piping for acids and other special ma terials; Pipe Fabricating, Bending and Threading; Welding. Brass, Bronze and other Castings; Valves: Air Relief, Globe, Angle, Cross, Check, Quick Opening and Closing. Non-return, Tank, Pressure, Reduc ing and Regulating, Safety and Y. Pipe Bends and Coils; Unions, Tees, Ells and Nipples; Cast Iron, Steel and Wrought Iron Pipe; Pipe Rolls; Steam Traps. Automatic Sprinkler Systems. Equiflo Valve installations of this type of heating system. This whole problem has now been simplified by the invention of the Grinnell Equiflo Valve. The Grinnell Equiflo Valve for forced hot water heating permits: . A Revolutionary Development in Forced Hot Water Heating-- One of the chief difficulties in the way of a broader use of forced hot water heating systems with their many important advantages has been the determination of pipe sizes by the complex and arduous method of calculating frictional re sistances. Failure to do this, plus easily possible installation mistakes has resulted in many unsatisfactory 1. The calculation of pipe sizes for this system by simple tables, similar to those commonly used in connection with the design of vacuum steam systems. 2. Change in locations of radiators or piping during installation to take care of iocal construction conditions without re calculation of pipe sizes. The Grinnell Equiflo Valve for forced hot water heating accom plishes: 1. More nearly perfect equalization of flow to every radiator than has ever been 657