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Boilers Leader Boiler and Heater Company 310 S. Michigan Avenue, Chicago, 111. "THE KOOLSTACK LINE" Steel Heating Boilers for Oil, Gas, Coke. Gas Fired Automatic Steam Boilers and Water Heaters. Oil Fired Automatic Heating Units. Economizers for Oil Burners, Storage Water Heaters. Koolstack Boilers have been de signed particularly for burning oil. They have far more than the usual amount of heating surface, with the result that they are extremely econo mical for oil burning. In Place of allowing the hot gases to escape up the chimney, Koolstack construction passes these gases from the combustion chamber to the top of the rear section then down through the tubes and out at the bottom. This construction absorbs all the heat that is practical, allowing only such an amount to go up. the chimney (usually around 300 deg. fahr.) as to insure proper draft conditions. An Automatic. Damper provides temporary draft acceleration at the initial firing period by automatically by-passing the products of combustion direct to the chimney. This damper closes when the stack temperature reaches 250 deg. fahr. ' Koolstack Boilers are now available for use with any good forced draft oil burner in sizes shown in table below. Complete Units. Koolstack Oil Fired Automatic Heat Machines consisting of oil burner and boiler built into one compact unit will be available January 1, 1930-.' Capacities of these units will range from 500 to 3,000 sq. ft. of steam. They are designed and built to give the highest efficiency obtainable in domestic heating equipment for burning oil. Write for Bulletin giving complete details. Koolstack Boiler Ratings and Dimensions Size 2648 2654 2860 3954 3963 3972 Steam Net Rating Sq. Ft. Height of Water Level In. 800 1000 1200 1600 2100 2600 37'/, 42'A s1 Water Net Rating Sq.Ft. 1280 1600 1920 2880 3520 4160 Approx. Shipping Weight Lbs. Grate width Diam. Overall In. In. Height Overall In. Length Overall In. Size Size Size" Smoke Flow Return Outlet Opening Opening In. In. \n. 2000 2200 2400 3500 3900 4300 m 23'/, 33/, 33VS 33'A 36'/2 36'/2 36i/2 46 46 46 52/4 59'/, 65'/i 61 70>/,, 79'/, 68'/, 661/ 681/ 90 90 90 10 10 10 12 12 12 33 3/ 3'/i k4 4'/2 41/2 55 Koolstack Boilers are built in accordance with A. S. M. E. low pressure heating boiler code. All ratings are based on actual boiler capacity at outlet. 594 Boilers Molby Boiler Company Incorporated Subsidiary of The Universal Pipe and Radiator Company Molby Magazine-Feed Downdraft-Crossdraft Boilers for burning No. 1 Buckwheat Anthracite GRAYBAR BUILDING, LEXINGTON AVENUE AT 43rd STREET, NEW YORK PHILADIU.FIUA BRANCH 2401 Chestnut Street Lansdale, Pa. Branch SO Central Avenue C-**hicago TB>~ra. n, ch 332 S. Michigan Avenue The Molby heating boiler pays for itself. It is self feeding and gives a steady, even heat over long periods, burning No. 1 Buckwheat at half the cost of large sizes of anthracite. Also burns free-burning bituminous. Also coke. Magazines need toaling only once a day. Built throughout in accordance with codes of A. S. M. E. and A. S. H. & V. E. Tested and Certified by Outside and Un biased Engineers of National Reputation. Tests have been made, not alone by our own engineers, but in the nationally-known Frost Research Laboratory, at Norristown, Pa.--and these laboratory tests are certified tlliMS_izes--_for Homes, Apartment to by Mr. Robinson V. Frost, C. E., Member A. S. M. E. Houses and other large Buildings. - and A. S. H. & V. E. For the benefit of engineers, architect and contractor we will gladly furnish charts in fullest detail, as submitted by the Frost Research Laboratory, showing grate areas, ratings, boiler performances and efficiencies. .Ask nearest office for these charts. SIZES. CAPACITIES, DIMENSIONS, ETC. -1 1 -J ... V I I____ L- z- _________________________ _________________ Note.--Id ordering 26-in. boilers state whether you wish same fitted up with right hand or left hand end to the chimney, lengtEhqiunicplmudeenst.S--mEoakcehBsotexa. m boiler is equipped with a full set steam trimmings, a pressure regulator and a complete set of firing and cleaning tods. Instruction books for erecting and operating accompany each boiler. Each water boiler is equipped with a.thermometer, a water temperature regulator and a complete set of firing and cleaning tools. Instruction books for erectinWg haennd odpomereastitnicghaocct owmaptearnsyuepapclhybtaoinlekr.is to be heated by beating boiler add to actual load 2 sq. ft. for each gallon of tank capacity on a steam job, ami 3 sq. ft. for each gallon on a hot water job. 595