Document jgNZry5wpdY5Lzj08r39a6dN2

Air Conditioning Lee Engineering Company Union National Bank Bldg., Youngstown, Ohio LEE DIRECT WARM AIR HEATING -The Lee System of warm air heating generally costs less to install than steam or hot water; utilizes fuel with a high degree of efficiency; distributes the heat exactly where needed; responds promptly without lag; requires little or no maintenance; and needs no licensed attendant. Heaters for use with the Lee System are made in the four types illustrated and described briefly below. BRICK-SET TUBULAR HEATER For use with central heating system in connection with duct distribution. Single heater capacities from 2,800,000 Btu per hour to 8,000,000 Btu per hour. Two heaters, installed as a battery serving as one unit, provide capacities over 10,000,000 Btu per hour. STEEL ENCASED TUBULAR HEATER For use with central heating systems in connection with duct distribution over a capacity range of from 2,000,000 Btu per hour to 6,000,000 Btu per hour. Heater may be installed in heated area without en closure, requires no foundation, and may be moved from one location to another by taking unit apart and reassembling. TUBULAR UNIT HEATER For use either as a central system in connection with duct distribution or with adjustable outlet nozzles as a unit heater. Capacity range from 2,000,000 Btu to 6,000,000 Btu per hour. In sizes up to 4,000,000 Btu heater is shipped as a completely assembled unit with all but mechanical equipment, refractory lining and controls in place. Heaters require no foundation and are equipped with crane hooks so that they may be moved from one location to another. SHELL UNIT HEATER For use with or without distributing duct system. Heaters have capacity range of from 400,000 Btu to 2,000,000 Btu per hour. Available for either stoker or hand firing. All units are shipped completely as sembled, wired and ready for operation. Stoker-fired units are shipped assembled with all parts in place ex cept mechanical equipment, refractory lining and con trols. Available in both hand and stoker fired models. Brick Set Tubular Healer Steel Encased Tubular Heater Tubular Unit Heater Shell Unit Heater For further information write for Catalog HV-44. 870 MVfe Air Conditioning National Heater Co. 401 Essex Bldg., Minneapolis 2, Minn. quipcr'eni: Mutuums STEEL S-P-A-C-E HEATERS OIL-GAS--STOKER HAND FIRED UNITS As shown in diagram these heaters are built as a complete unit consisting of heater,' casing, firing equipment, multi ple blower assembly, motor, drive induced draft blower and controls. NATIONAL HEATERS are con structed of welded copper bearing hot rolled one quarter inch boiler plate steel instead of the usual lighter ten guage plate. This provides positive assurance of life-long gas and smoke tight operation with ample provision for absorbing all strains resulting from expansion and contraction. The body of the heat generator is long and narrow in design, allowing complete fuel consumption with prop erly spaced radiating fins to facilitate / maximum heat transmission from this primary heating surface. Casings are sturdy with insulated double metal walls to reduce wasteful radiation to a minimum. Panel type construction with rigid angle iron frames and structural iron reinforcement at both top and bottom assures a strong durable installation. Casings are designed for quick and con venient assembly. ENGINEERING RATING CHART heater KJMBER B.T.U. OUTPUT CAPACITY s.P. C.F.M. MAX. 300 350 500 350 600 650 TOO 750 640.000 660.000 1.215.000 2.000.000 2^00,000 3.000000 3.300.000 4,000.000 6.200 M.OOO I6J50 32.000 43/)00 32.000 36.000 60,000 CRATE AREA SQ.FT. 5Q.FT. HEATING SURFACE VOLUME CU.FT. INSIDE HEATER BLOWER MAXIMUM BLOWER MOTOR H.P. MAX. RAM. APPROXIMATE TUBES WEIGHT NO. D1A. LESS STOKER 6.3 6.0 12.0 14.7 16.0 20.0 ' 24.0 26.00 320 430 600 644 I42h 1665 1610 1935 73 100 130 175 - 315 373 430 450 16-TWIN 3 I6*TWIN 5 2rTWIN 2I"TR1PLE' 7.5 to 27-TRIPLE 13 3CTTRIPLE 20 30TTRlPt_E 23 30*`TRIPLe 30 iTSO 1730 1750 1730 1730 1750 1750 1730 2 2 10 12 16 16 16 20 6" 6" 44* 4~ 4" 4" 4* 6.6 SO 14,4 20 15.660 16.610 20,650 24.090 26.340 26,470 871