Document bBmX14Le6yko3b9mGKwQvymJy

Heating Systems National - U. S. Radiator ______________ CORPORATION______________ HEATING AND AIR CONDITIONING DIVISION General Offices: Johnstown, Pa. ' Cast Iron and Steel Boilers Baseboard Convectors Radiators Fintube Unit Heaters Furnaces Oil and Gas Burners Air Conditioning 'v Accessories Nationwide distribution through Branches, Wholesalers, Plumbing and Heating Contractors _ NATIONAL-U.S. ALL-FUELS BOILERS (CAST IRON) Designed especially to meet the special requirements of automatic firing . . . rugged cast iron construction. Provided with many features to insure high operat ing efficiency and maximum fuel econ omy. Convertible to any fuel or method of firing. Wide range of both storage and tankless water heaters available. 4 *27" Series . .. for medium to large size residential installations available m six sizes: Net Steam Ratings from 350 to 880 sq ft, and Net Water Ratings from Mf7" Series 560 to 1560 sq ft. "37** Series . . . for large residential and small commercial installations . . . available in nine sizes: Net Steam Rat ings from 700 to 2300 sq ft, and Net Water Ratings from 1120 to 3835 sq ft. "47" Series . . . for commercial, indus 87" Series trial and institutional installations . . . available in ten sizes: Net Steam Rat ings from 2500 to 7600 sq ft, and Net Water Ratings from 4000 to 12,160 sq ft. NATIONAL-U. S. OIL HEATING BOILERS AND UNITS 47" Series (CAST IRON) Developed specifically for oil firing . . the Oil Heating Units comprise a cast iron boiler, dependable oil burner, precast combustion chamber and high qual ity controls. Oil Heating Boilers are de signed for top performance with any oil burner. A wide range of both storage and tankless water heaters is available with "10" Series all Units and Boilers. "10" Series ... an economical wet base Boiler and Unit for installation in small and medium size residences . . . available in five sizes: Net Steam Rat ings from 230 to 500 sq ft, and Net Water Ratings from 430 to 910 sq ft. "12W" Series . .,. priced low and styled right for installation in the small to medium size home . . . wet base de sign . . . available in four sizes: Net Water Ratings from 430 to 855 sq ft. "12" Series ... a popular wet base ' Series {with Flush Jacket) Boiler and Unit for the small to medium size home. Available in four sizes: Net Steam Ratings from 230 to 470 sq ft, and 18" Series (with Enclosing Jacket) Net Water Ratings from 430 to 855 sq ft. 354 National-U. S. Radiator Corporation Heating Systems Boilers, Oil A Gas "46" Series "20" Series ... a larger wet base Oil Heating Boiler for residential installa tions . . . available in four sizes: Net Steam Ratings from 340 to 780 sq ft, and Net Water Ratings from 625 to 1390 sq ft. "25B" Series ... a high capacity Oil Heating Boiler . . . wet base construc tion for residential, commercial and in dustrial installations . . . available in six sizes: Net Steam Ratings from 760 to 2260 sq ft, and Net Water Ratings from 1355 to 3775 sq ft. "27," "37" and "47" Series . . . Boil ers and Units for medium to large size buildings . . . available in twenty-three sizes: Net Steam Ratings from 400 to 6400 sq ft and Net Water Ratings from 730 to 10,240 sq ft. "46" Series . . . Boiler and Unit of special design for small to medium size residential installations . . . available in four sizes: Net Steam Ratings from 310 to 700 sq ft, and Net Water Ratings from 570 to 1255 sq ft. "8SB" Series NATIONAL-U.S. GAS BOILERS National-U. S. Gas Boilers are mod- ernly styled, compact and designed ex clusively for gas firing. Cast iron sections "*r." "sr" ani "47" Sene, for long life, effective gas travel, de pendable controls and many other fea ture-advantages contribute to efficient and economical operation . . . .A.G.A approved for all gases. _ "11B" Series ... a factory-assembled packaged boiler, economically priced . .. for small to medium size homes . . . available in seven sizes: Net Water Rat ings from 185 to 725 sq ft. "16B" Series . . . dependable, efficient gas heating for residential and commercial installations . .. can be equipped with water heater . . . avail able in twelve sizes: Net Steam Ratings from 295 to 2090 sq ft, and Net Water Ratings from 545 to 3510 sq ft. "1$B" Series "22," "33" and "44" Series . . . taper ing zig-zag flue passages extract maxi mum heat-save fuel ... to meet require ments of residences to small commercial structures . . . available in twenty-one sizes: Net Steam Ratings from 110 to 1920 sq ft, and Net Water Ratings from 205 to 3245 sq ft. "66" Series . . . gas heating comfort for hotels, hospitals, and schools . . . available in twenty sizes: Net Steam Ratings from 1770 to 14,250 sq ft, and Net Water Ratings from 3005 to 22,800 sq ft. "55" Series 355