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Fuel
Configuration
Heat Exchanger
Identifier
Flue
Feature
Capacity
Capacity
Capacity
Blower Type
Clg Airflow Cap.
Clg Airflow Cap.
Burner
Oil Furnace Model Nomenclature Example Model Numbers
O
H
C
F
A
0
7
2
D
V
4
R
O = Oil
O
H = Highboy D = Downflow
H
C = Heat Exchanger Identifier
C
F = Front
F
R = Rear
A = Single Stage
A
Heating Capacity MBTUH (000's) with factory installed nozzle
0
7
2
D = Direct Drive
D
Clg. Airflow: Example = 48MBTUH = 4 tons @ 400cfm/ton
4
8
Clg. Airflow Variable Speed (ECM) V4 = 4tons
V
4
R = Riello
R