Lennox G43UF User Manual

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. 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 Tons
MODEL NUMBER IDENTIFICATION
G 43 24−B− 045
Unit Type
G = Gas Furnace
Series
43 = 90% Minimum AFUE
Nominal Add−On Cooling Capacity
24 = 2 tons (7.0 kW)
36 = 3 tons (10.5 kW)
48 = 4 tons (14.10 kW)
60 = 5 tons (17.5 kW)
1
Cabinet Width
B = 17−1/2 in. (445 mm)
C = 21 in. (533 mm)
D = 24−1/2 in. (622 mm)
Nominal Gas Heat Input
045 = 44,000 Btuh (12.9 kW)
070 = 66,000 Btuh (19.3 kW)
090 = 88,000 Btuh (25.8 kW)
110 = 110,000 Btuh (32.2 kW)
135 = 132,000 Btuh (38.7 kW)
1
Indoor coils with the same letter designation
will physically match the furnace.
UF
Configuration
UF = Up−Flow

Lennox G43UF Specifications

General

Heating Stages	Single-stage
Blower Motor	PSC
Ignition System	Hot Surface Ignition
Gas Valve	Single-stage
Cabinet Width	17.5 inches
Fuel Type	Natural Gas or Propane
Cabinet Type	Upflow/Horizontal
Ignition Type	Hot Surface Ignition
Heating Capacity	44, 000-132, 000 BTUH
Warranty	5-Year Limited Warranty on covered components