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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 120 208 220 230 240 277 440 460 480 120 1.00 3.00 3.36 3.67 4.00 5.33 13.44 14.69 16.00 208 .33 1.00 1.12 1.22 1.33 1.77 4.47 4.89 5.32 220 .30 .89 1.00 1.09 1.19 1.58 4.00 4.37 4.76 230 .27 .82 .91 1.00 1.09 1.45 3.66 4.00 4.36 240 .25 .75 .84 .92 1.00 1.33 3.36 3.67 4.00 277 .19 .56 .63 .69 .75 1.00 2.52 2.76 3.00 440 .07 .22 .25 .27 .30 .40 1.00 1.09 1.19 460 .07 .20 .23 .25 .27 .36 .91 1.00 1.09 480 .06 .19 .21 .23 .25 .33 .84 .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

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