How to obtain the breakdown between the Energy Transfer for two separate heating coils modeled?

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Add an Output:Variable for each coil:

Output:Variable,
  Example Coil Name 1, !- Key Value
  Heating Coil Heating Rate, !- Variable Name
  Timestep;                  !- Reporting Frequency

Output:Variable,
  Example Coil Name 2, !- Key Value
  Heating Coil Heating Rate, !- Variable Name
  Timestep;                  !- Reporting Frequency

Or use the variable name 'Heating Coil Heating Energy' instead. Valid reporting frequencies are 'Detailed', 'Timestep', 'Hourly', 'Monthly', 'Annual', or 'RunPeriod'.