The following diagram illustrates how to solve for watts, ohms, volts, or amps using Ohm's Law. Click to enlarge.
Fill in any two values to determine the other two:
°F = (9/5) × °C + 32
°C = (°F - 32) × (5/9)
Enter a value and select units to convert between
Calculate the electrical power, flow rate or temperature requirement as follows:
SCFM = airflow in standard cubic feet per minute
ΔT = temperature rise in F° from the inlet to the exhaust
Watts = SCFM x ΔT/3
Fill in two values to determine the third.
Three Phase Unit
Line Current = Wattage / (Voltage * √3)
Utilized when control voltage differs from line voltage. Primary over current protection. Class 1 units must have primary side protection by fusing. Class 2 units have internal protection and do not require additional fusing unless specified
UL standards and NEC code required for heaters drawing more than 48 AMPS. Accessory fusing is available on heaters drawing less than 48 AMPS when requested
Available unfused door interlocking disconnect switch (max. 384 AMPS). Not available on bottom mount heaters.