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Oil Furnace Model Nomenclature Example Model Numbers
H = Highboy D = Downflow
6 = Heat Exchanger Size Identifier
Heating Capacity MBTUH (000's) with factory installed nozzle
Clg. Airflow: Example = 48MBTUH = 4 tons @ 400cfm/ton
Clg. Airflow Variable Speed (ECM) V5 = 5tons
B = Beckett, R = Riello, N = Beckett NX, C = Carlin
Model Number Digit
O = Oil
F = Front
R = Rear
A = Single Stage
X = 2-Stage
D = Direct Drive
1
2
3
O H
6
O H
6
O H
8
O H
8
O
H
6
ii
4
5
6
7
8
9 10 11 12
F
A
0
7
2 D
F
A
0
7
2 D V
F
A
1
1
9 D
F
A
1
1
9 D V
F
R
A
X
0
7
2
D
V
4
8 B
4 R
6
0 B
5 R
4
8
5
B
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