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MULTIPLICATION FACTORS
HEATER VOLTAGE
RATING
ACTUAL HEATER
VOLTAGE
MULTIPLICATION
FACTOR
240
200
0.69
208
0.75
220
0.84
230
0.92
240
1.00
480
415
0.75
440
0.84
460
0.92
480
1.00
Example: 20.0 kW (at 240 v) heater on 230 v
= 20.0 (0.92 multiplication factor)
= 18.4 kW capacity at 230 v
MINIMUM AIRFLOW (CFM) FOR SAFE ELECTRIC HEATER OPERATION
UNIT 50HS
018
024
030
036
042
048
060
HORIZONTAL DISCHARGE
700
800
1000
1300
1300
1600
1750
VERTICAL DISCHARGE
700
800
1000
1300
1300
1600
1750
21