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Specialties, Heating Combustion Specialties Corporation Walter S. Timmis. past president of the American Society of Heating and Ventilating Engineers has written an extensive report on COMBUSTO Draft System from which the following paragraphs are quoted. (Complete report will gladly be forwarded on request.) Manufacturers of WISTO 250 West 54th Street, New York ' For Heating Plants Saves coal and labor; maintains even heat with less draft. For Power Plants Higher evaporation per pound of coal eliminates smoke Mr. Timmis states. "To secure the most eco- nomical results in combustion for heating it is necessary to use the proper amount of air under the fuel bed for the distillation of the gases and the correct amount of air properly diffused, preferably heated and delivered over the'fire bed in order to complete the combustion by burning the distilled gases--in brief--an efficient boiler is a producer having means for consuming gas produced." WHAT COMBUSTO IS To quote Mr. Timmis further, "Combusto is a system carefully studied, tested and developed for each individually different case and providesmeans for supplying the necessary diffused and heated air (oxygen) over the fire to properly com plete in the second stage the combustion begun in the fuel bed by distillation of gases." UNIQUE AND FUNDAMENTAL REQUIREMENT FOUND IN COMBUSTO " Perhaps the most important feature of Com busto is the resistance to the flow of air through the apparatus itself, which is made to equal the resistance of the fuel bed, thus producing a balanced condition above and below and through the fuel bed--a fundamental requirement for correct and economical combustion which is ignored in regular furnace .and boiler design. WHAT COMBUSTO DOES (See illustration of COMBUSTO equipped plant below.) "Combusto is of cast iron cellular structure, the air is heated on passing through this structure and is then discharged through a large number of small apertures over the fire bed. The amount of air thus admitted having been carefully computed for the required conditions, the result is practically perfect combustion, which to the user of Combusto results in-- Economy of fuel Fewer firings Complete combustion of fuel, hence-- A finer ash and reduction of clinker Elimination of coal gases Means for producing a steady even heat." COAL WASTED (Left) Without Combusto, a checked fire produces no dependable results. The gases that distill from fuel bed are a total loss. Heat can be produced only by speeding up stack draft. This is wasteful and re quires frequent attention. COAL SAVED (Right) With Combusto, all gases are burned completely with Bunsen blue flame with stack draft continu ously checked to minimum. Hence, amount of gas made can be regulated to amount of heat needed by simple adjustment of the ash pit damper. SPECIFICATION: The following.clause adopted since 1916 by one of the largest railways in the United States is suitable as a standard' specifica tion in connection with low pressure hot water or heating boilers or warm air plants. "Equip all boilers (warm air furnaces) with Combusto of size recommended by Combustion Specialties Cor poration's engineers." STYLES: Combusto is manufactured in 28 basic styles--each style is capable of adjustment to meet specified conditions. Suitable styles are manu factured for practically any type of heating plant and for all sizes and grades of fuel. PRICES: Prices range from $25.00 on small house-heating plants to $150.00 on largest low pressure heating boilers. Definite estimates can at once be. submitted if manufacturer's name and number of boiler is sent to us. A FEW NOTABLE INSTALLATIONS Daniel Guggenheim Estate Clarence HTMackay Estate - Otto Kahn Estate George (Eastman Kodak Co.) Garford Motor Truck Co. U. 8. Department of Labor John J. Bausch (Bausch A Ldmb) Firestone Tire A Rubber Co. Frederick G. Erbe (Yawman A Erbe) Childs Co.. 52 installations D. L. A W. Railroad, 40 installations Bank of the Manhattan Co., 26 inst. 386 Specialties, Healing G. M. Davis Regulator Company 407 MILWAUKEE AVE., CHICAGO, ILL. Since 1875 Manufacturers of Better Valve Specialties Davis Piston Type Regulator For reducing high pressure steam down to any service pressure. Patented inner valve design in sures proper regulation regardless of velocity. Lever gives visible operation and makes hand testing possible. Oil dash pot insures steady action. Sizes A to 14 in. Davis Back Pressure Valve The original semi-balanced exhaust line valve for maintaining a given back pressure. Has double i Davis Piston Type seated piston disc--operates noiselessly--requires comparatively small counterweight, patented disc Pressure Regulator and seat construction prevents sticking. May be (.4 ny service pressure) used horizontally or vertically. Sizes 2 to 30 in. Angle valves made to order. Davis Steam Trap . Double cone shaped balanced valves give con tinuous flow-r-unusually large capacity--handle any 5 pressure--take care of widely fluctuating load. All vital parts are renewable and quite accessible. Sizes A to 3 in. I Other Davis Valves Davis Back Pressure Valve A 64 Page catalog showing a number of pressure regulating devices not here illustrated will be sent on request. Tell us about your special problems in pressure control--we may be able to be of service. HVC. 24-F-ftTC 387 Davis Steam Trap .