Specifications - Lennox G21Q3-40 Unit Information

SPECIFICATIONS (units equipped with conventional multi speed blower motor)
Model No.
Input Btuh
Output Btuh
*A.F.U.E.
California Seasonal Efficiency
Temperature rise range (°F)
High static certified by A.G.A. (in wg.)
Gas Piping Size
I.P.S. (in.)
Vent/Intake air pipe size connection (in.)
Condensate drain connection (in.) SDR11
Blower wheel nominal diameter x width (in.)
Blower motor hp
Number and size of filters (in.)
Tons of cooling that can be added
Electrical characteristics
**LPG kit (optional)
External Filter Mounting
Kit (optional)
•Filter is not furnished with kit. Filter kit utilizes existing filter supplied with G21 unit.
*Annual Fuel Utilization Efficiency based on D.O.E. test procedures and according to F.T.C. labeling regulations.
Isolated combustion system rating for non weatherized furnaces.
**LPG kit must be ordered extra for field changeover.
SPECIFICATIONS (units equipped with conventional multi speed blower motor)
Model No.
Input Btuh
Output Btuh
*A.F.U.E.
California Seasonal Efficiency
Temperature rise range (°F)
High static certified by A.G.A. (in wg.)
Gas Piping Size
I.P.S. (in.)
Vent/Intake air pipe size connection (in.)
Condensate drain connection (in.) SDR11
Blower wheel nominal diameter x width (in.)
Blower motor hp
Number and size of filters (in.)
Tons of cooling that can be added
Electrical characteristics
**LPG kit (optional)
External Filter Mounting
Kit (optional)
•Filter is not furnished with kit. Filter kit utilizes existing filter supplied with G21 unit.
*Annual Fuel Utilization Efficiency based on D.O.E. test procedures and according to F.T.C. labeling regulations.
Isolated combustion system rating for non weatherized furnaces.
**LPG kit must be ordered extra for field changeover.
G21Q3 40
Natural
**LPG
(1) 16 x 25 x 1
LB 65810A
Part No. LB 81871CA
•Filter size (in.)
(1) 16 x 25 x 1
G21Q3 80
80,000
73,000
93.9%
90.1%
45
.50
Natural 1/2
**LPG 1/2
2
1/2
10 x 8
1/3
(1) 16 x 25 x 1
2
LB 65810B
Part No. LB 81871CA
•Filter size (in.)
(1) 16 x 25 x 1
40,000
38,000
96.2%
90.7%
35 65
.50
1/2
1/2
2
1/2
10 x 8
1/3
(1) 16 x 25 x 1
1 1/2 3
120 volts 60 hertz 1 phase (less than 12 amps) All models
LB 81871CA
(1) 16 x 25 x 1
G21Q4 80
80,000
73,000
93.9%
88.9%
75 40 70
.50
1/2
1/2
2
1/2
11 x 9
1/2
(1) 16 x 25 x 1 (1) 20 x 25 x 1
3 2 1/2 4
120 volts 60 hertz 1 phase (less than 12 amps) All models
LB 65810B LB 65810B
LB 81871CA LB 81871CB
(1) 16 x 25 x 1 (1) 20 x 25 x 1
Page 4
G21Q3 60
60,000
55,000
94.1%
89.9%
40 70
.50
1/2
1/2
2
1/2
10 x 8
1/3
1 1/2 3
LB 65810B
G21Q5 80 G21Q3 100
80,000 100,000
74,000 93,000
93.2% 94.9%
88.3% 90.8%
35 65 55 85
.50 .50
1/2 1/2
1/2 1/2
2 2
1/2 1/2
12 x 12 10 x 8
3/4 1/2
(1) 20 x 25 x 1
4 or 5 2 3
LB 65810C
LB 81871CB
(1) 20 x 25 x 1
G21Q4 60
60,000
55,000
94.1%
88.8%
35 65
.50
1/2
1/2
2
1/2
11 x 9
1/2
(1) 16 x 25 x 1
2 1/2 4
LB 65810B
LB 81871CA
(1) 16 x 25 x 1
G21Q4/5 100
100,000
95,000
94.5%
89.6%
40 70
.50
1/2
1/2
2
1/2
12 x 12
3/4
(1) 20 x 25 x 1
3 1/2 5
LB 65810C
LB 81871CB
(1) 20 x 25 x 1