Electric Heater Formulas

Conversion
1 KW = 3413 BTU


Load Requirement
KW =   CFM x Temp. Rise
3160


Line Current (1 Phase)
Amps =   KW x 1000
Volts


Line Current (3 Phase)
Amps =   KW x 1000
Volts x 1.73


Applied vs. Rated KW Factors
Rated
Voltage		 Applied Voltage
208 230 240 460 480 575 600
240 0.75 0.92 1.00 N/A N/A N/A N/A
480 N/A N/A N/A 0.92 1.00 N/A N/A
600 N/A N/A N/A N/A N/A 0.92 1.00
1. Locate Heater Rated Voltage.
2. Locate Actual Applied Voltage.
3. Multiply Heater Rated KW by Factor Shown to Obtain Actual KW Capacity