Troubleshooting guide
I.O.M. • ELECTRIC DUCT HEATER
5
Environmental Technologies, Inc. •©June, 2001 • Electric Duct Heater IOM
MINIMUM AIR VELOCITIES
0
200
400
600
800
1000
1200
1400
1600
0 2 4 6 8 10 12 14 16 18 20 22 24
KW/SQ FT.
VELOCITY (FPM)
ENTERING AIR (Deg. F)
80
60
40
25
10
0
OPEN COIL CONSTRUCTION
100
200
300
400
500
600
700
800
900
1000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
KW/SQ FT.
15.5 Maximum Kw/Sq. Ft.
FPM
304.8
274.2
243.6
213.0
182.4
152.4
121.8
91.2
60.6
30.0
M/MIN.
HORIZONTAL AIRFLOW
VERTICAL AIRFLOW
F
INNED TUBULAR CONSTRUCTION
VELOCITY
INLET AIR TEMPERATURE
77°F, 25°C