![]() ![]() G43UF / SPECIFICA TIONS Gas Heating Performance ModelNo. ![]() OPTIONS Air Filter and Rack Kit for Side Return Air Applications (Not for use with RAB Return Air Base) W ashable or vacuum cleanable polyurethane frame type filter and external side return air rack available for field installation. G43UF / FEA TURES FIL TER (NOT FURNISHED) Filter and provisions for external mounting must be field provided. Designed for normal expansion and contraction. Main 3-pass clamshell type heat exchanger constructed of heavy−gauge, aluminized steel. G43UF / FEA TURES HEA TING SYSTEM Lennox Duralok Plus ® Heat Exchanger Assembly Lennox developed heat exchanger assembly consists of primary heat exchanger and secondary condenser coil assembly. G43UF / FEA TURES CONTENTS Blower Data Pages 13−15. 210394 August 2005 Supersedes December 2004 AFUE − up to 92.1% Input − 44,000 to 132,000 Btuh Nominal Add−on Cooling − 2 to 5 T ons MODEL NUMBER IDENTIFICA TION G 43 24 −B − 045 Unit T ype G = Gas Furnace Series 43 = 90% Minimum AFUE Nominal. ![]() G A S F U R N A C E S G43UF MERIT ® SERIES Up−Flow E N G I N E E R I N G D A T A Bulletin No. ![]()
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