Heat Pump Electrical Load Calculator
Use this heat pump load workflow for early panel-load screening when nameplate MCA and auxiliary heat kW are already known.
- Heat pump equipment load
- VA
- Auxiliary heat load
- VA
- Total heat pump load
- VA
- Panel load current
- A
Calculation details
- Phase multiplier
- x
- Calculation basis
- Selection boundary
Recent results
Formulas
- Heat pump equipment VA = heat pump MCA x voltage x phase multiplier
- Auxiliary heat VA = auxiliary heat kW x 1000
- Total heat pump load VA = heat pump equipment VA + auxiliary heat VA
- Panel load current = total heat pump load VA / (phase multiplier x voltage)
Use this calculator
Estimate heat pump equipment VA, auxiliary heat VA, total load VA, and panel load current from entered MCA, auxiliary heat, voltage, and phase.
Read the result
Review the calculated values with their displayed units and assumptions. The result is a planning aid for the stated inputs, not a final equipment or installation decision.
Check before final work
This heat pump electrical load estimate uses entered nameplate and auxiliary-heat values. It does not select conductors, breakers, demand methods, equipment settings, or prove code compliance.
FAQs
Does this size the heat pump circuit?
No. It estimates panel-load contribution from entered values. Circuit sizing and nameplate interpretation require equipment and code review.
Should auxiliary heat be added?
Enter the auxiliary heat load you want included in this screening case. Final treatment depends on the project load calculation.
What if the unit is three-phase?
Choose balanced three-phase and use the voltage and nameplate basis that match the equipment.