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American Blower Corporation General Offices: Detroit Works: Detroit, Michigan--Bond Hill, Cincinnati. Ohio Branch Offices in Principal Cities of United States and Canad HEATING AND VENTILATING EQUIPME "SIROCCO" UNIT HEATER Built with all the requirements of-the ideal industrial heating system-in mind--high efficiency, light weight heating element, compactness; .dependability, even dis tribution of heat, economy of installation and operation, accessibilityof parts, ease of control. For a given .size and tip speed the Sirocco Unit Heater delivers more heated air.than any unit of which we know. Fourteen standard sizes. Capacities: 290 to 3200 sq. ft. E. D. R. VENTURAFIN UNIT HEATERS For use in modern industrial buildings, stores, garages, etc., and designed to keep the heat in working areas where it is heeded. Venturafin Units are adaptable to High, Medium or Low Pressure Steam Applications--lor floor, wall or ceiling installation. Venturafin Units are easy to install "reconomical to operate and maintain. Six. standard sizes,. Capacities: 140 to 675 sq. ft. E. D. R. Complete. Catalogs and Data Supplied on Request Healers, Unit The Dixie Blower Company 1351 West 37th P|ace, Chicago, III. Manufacturers of Dixie Unit Heaters Dixie Unit Heater fe n.Kie Unit Heater is adapted to ,,#The (for wwhhiicchh aa unit. heater can ^gtai^>jyuusseeddr'., 1<:iinncciuluud*iinEg, _the h---eatinwg of ware"Smses, factories, offices, theatres, garages, Smirches, auditoriums, and many special ^plicauims for which a heater of high inhality is required. Sr-VThe Dixie Unit Heater is so constructed -wi-fhat it can be either suspended from the ^Psleatn line or from an overhead. support. t'Mfhe direction of the air is regulated by the ^adjustable shutters, at any angle from a Si' horizontal direction straight down to the is guaranteed to be leak-proof. A further outstanding feature of this design is the ease with which a tube can be replaced in case of damage. It is only necessary to unscrew the coupling and lift out the tube. The hole in the header can be plugged. with a M in. pipe plug and the unit put back into operation. The Unit need not be Unit Heaters are constructed and K^tested t0 operate continuously on any steam pressure up to 150 lb. Dixie cores l-S~{ ;Have been tested at several times this .^'pressure and found to be satisfactory. Cross Section of Compression Coupling ^S-.This is made possible by the use of the Used in the Dixie. Unit Heater "J highest grade material throughout and by 5i- the patented compression coupling, which fi'->;eiiminates the jxissibilities of all leaks out of service more than a few minutes, an incalculable advantage where service fc'-;Sbetween the tubes and the headers. Each h-a:-', tube is inserted in its proper place and the r/,;-;coupling tightened up by hand. Each core ' ./Jis a job`in itself. jtrf The tubes of which the Dixie core is con'.i strutted are made of heavy weight ilg in. if, seamless copper tubing upon which a spiral copper fin is securely fastened. is required. In a test to determine the holding strength of this compression coupling, 11,000 lb. (2)4 tons) pul! was exerted trying to pull the headers apart. Although the tubes were stretched nearly one-half inch the compression couplings held per fectly and the unit remained intact. .* ^Compression Coupling Ratings at 5 lb. Steam Pressure d; An outstanding feature of ' the Dixie Unit Heater is the Ky. ..patented compression couplings Kdmployed between the tubes 'jvSC.and the headers. These couplings insure a connection which Air Air Entering Leaving Heater Heater F. 0 F. B.t.u. Hour Con Equiv. densate Sq. FtLbs. Direct per Hour Rad. Cu. Ft. Air per Minute Ship- wPSt Lbs. 40 No. 50 60 65 70 130 465240 484 1920 6400 136 436500 454 1816 6400 141 410680 428 1712 6400 143 401000 416 1664 6400 144 367020 404 1616 6400 550 550 550 550 550 40 No. 50 800 60 65 70 130 232620 136 218250 141 205340 143 200500 144 193510 242 227 214 208 202 960 3200 230 908 3200 230 856 3200 230 832 3200 ;230 808 3200 230 40 No. 50 500 60 65 70 130 146880 135 138240 143 128880 145 124800 147 121160 155 146 136 134 129 612 576 537' 520 509 1300 . 1300 1300 1300 1300 170 : 170 170 170 170 40 No. 50 200 60 65 70 134 - 50880 138 45120 142 40320 143 38400 144 34520 53 47 42 40 37 212 920 188 . 920 168 "920 160 920 148 920 120 120 120 120 120 . Hear View Dixie Unit Heater uiAie unit, uoticr ------ V on Model A are 25 per cent less than Model B. Three-speod alternating- current motors operate at 500, 850 and 1150 r.p.m. 673