Document 91E2pNagkNg190pY4DeNRvVm3

Boilers, Heating Systems Radiators, Convectors THE NATIONAL RADIATOR COMPANY MODERN DESIGN HEATING EQUIPMENT Johnstown Pennsylvania BALTIMOaE.. Boston........... Chicago......... New York. . Branch Offices 2100 St. Paul Street ........620 Newbury Street . 400 West Madison Street ........ 60 East 42nd Street Philadelphia........................401 North Broad Street Pittsburgh....................................... 125 First Avenue Richmond..................................... 12 South Third Street WASHINGTON........................... 4034 Georgia Avenue, N .W. NATIONAL HEAT EXTRACTOR CAST IRON BOILERS. The distinguished family of National Heat Extractors was designed with full appreciation of the requirements of automatic heating. National Heat Extractors are provided with many features to insure high operating efficiency and maximum fuel economy. These include extended heating surface, multiple-flue section con struction, effectively insulated jacket and doors, and heat conserver baffles. Convertible from hand to automatic firing after installation and readily adaptable to any desired fuel or method of firing. Wide range of both storage and tankless domestic water heaters available NATIONAL OIL HEATING UNITS, cast iron or steel, provide complete "one package" equipment designed for maximum effi ciency and top performance with this fuel. Complete automatic controls, prefabricated combustion chamber of proper proportions, quiet burner for rear firing and attractive all-enclosing jacket. NATIONAL GAS BOILERS are modern, compact and designed exclusively for gas firing. Cast iron sections for long life and dependability. Tapered flues, long zigzag fire travel and heavy insulation insure efficiency and economy. "00" Series Oil Heating'Unit "800" and "400" Series "500" iSeries HEAT EXTRACTOR BOILERS Boiler Series 100 200 300 400 500 Net I-B-R Ratings, Sq Ft Steam v Water 170 to 410 350 to 880 700 to 2300 2500 to 6000 4000 to 10300 270 to 660 560 to 1410 1120 to 3680 4000 to 9600 6400 to 16480 OIL HEATING UNITS Type of Unit Net Ratings, Sq Ft Steam Water 100 Series Cast Iron......... 200 Series Cast Iron...................... Residential Steel. 230 to 410 400 to 880 275 to 700 370 to 660 640 to 1410 440 to 1120 GAS BOILERS Gas Boiler Boiler Series Net Ratings, Sq Ft A.GA. Approved Steam Water 20 and 22 30 40 109 to 390 353 to 983 445 to 1920 174 to 624 565 to 1570 711 to 3070 1254 The National Radiator Company Boilers, Heating Systems Raffia*TM. Kf-tS" Steel Boiler te'-gy-sy steel Boiler NATIONAL STEEL BOILERS meet all the requirements of the SBI Testing and Rating Code and the ASME Boiler Construction Code. All are inspected and approved by a representative of the Hartford Steam Boiler Inspection and Insurance Company. The 18 in. and 23 in. Series Residential Steel Boilers are designed for smaller homes. The 26 in., 29 in., and 39 in. Series Resi denti al Steel Boilers are de signed specifically for RESIDENTIAL STEEL BOILERS large homes, apart SBI Net Ratings, Sq Ft ments, and commer Boiler Series cial installations. Can Steam Water be furnished unjack eted, or with raodernly styled heavily insu 18* and 23'............. 26', 29', and 39'... 275 to 700 700 to 3000 440 to 1120 1120 .to 4800 lated jacket. NATIONAL COMMERCIAL STEEL BOILERS are designed to supply the heating needs of larger buildings. Their firebox proportions conform with the recommendations of the Stoker Manufacturers' Association. Hand fired boilers may be con verted to stoker, oil, or gas firing at any time after installation. COMMERCIAL STEEL BOILERS Boiler Type SBI Net Ratings, Sq Ft Steam Water Automatically 3000 to 35000 2500 to 29170 4800 to 56000 4000 to 46670 Aero Convector Convector Enclosure NATIONAL AERO CONVEC TORS are of compact cast iron design with fins cast integral with tubes. Adaptable to any type of heating system and can be used with direct radiation. NATIONAL ART RADIATORS blend inconspicuously with most decorative schemes. Compact proportions require minimum floor space. A wide variety of sizes and ratings can be furnished. NATIONAL CONVECTOR ENCLOSURES are made in several -different types applic able to modern structural or decorative requirements. They were designed to develop maxi mum output of the convector. NATIONAL UNIT HEATERS are designed for quiet, economical operation witn steam or hot water. Available in both Hori zontal and Vertical delivery types in a number of sizes. 1255 Unit Heater Horizontal Delivery