Estimate heat pump power use, energy costs, efficiency, temperature effects, auxiliary heating, fan loads, and annual consumption with flexible units and comparisons for homes.
This table compares the same thermal load at several COP values.
| COP | Input Power | Monthly kWh | Monthly Cost | Annual Cost |
|---|
Electrical input power = Thermal capacity ÷ COP
Daily energy = Total running power × operating hours × duty cycle
Monthly cost = Monthly electricity × electricity rate
Effective COP = Thermal energy delivered ÷ total electrical energy
Heat pumps move thermal energy instead of creating heat directly. This approach often reduces electricity use during normal operating conditions. The calculator estimates electrical demand from rated thermal capacity. It divides thermal output by the selected efficiency value. COP gives the clearest direct relationship for this calculation. EER, SEER, and HSPF can also provide estimates. Those ratings are converted into approximate COP values first.
Actual consumption changes with weather, building load, and equipment design. Outdoor temperature can strongly influence heating performance during cold conditions. Cooling efficiency can also fall during very hot weather. The optional temperature adjustment provides a simple planning estimate. Manufacturer performance tables remain better for detailed engineering analysis. Indoor temperature is included to show the temperature lift. Larger temperature lifts usually require more compressor work.
Runtime matters as much as the equipment efficiency rating. A heat pump rarely operates at full output continuously. The duty cycle represents its average fraction of active runtime. Fan and pump loads add electricity during active operation. Electric resistance backup heat can increase demand very quickly. Standby power adds a smaller load during inactive hours. Including these loads creates a more realistic energy estimate.
Electricity cost equals energy consumption multiplied by the utility rate. Monthly values use your selected operating days. Annual values also use the selected operating months. The COP comparison table shows efficiency effects clearly. Higher COP values reduce compressor electricity for equal thermal output. This comparison can support replacement and operating cost decisions. Utility tariffs may contain taxes, tiers, or demand charges. Add those separately when precise billing estimates are required.
Seasonal monitoring improves future consumption estimates. Use realistic inputs and compare several operating scenarios carefully. Reliable estimates help users plan efficient heat pump operation.
| Thermal Capacity | COP | Input Power | Runtime | Daily Energy |
|---|---|---|---|---|
| 6 kW | 2.5 | 2.40 kW | 8 h at 70% | 13.44 kWh |
| 6 kW | 3.0 | 2.00 kW | 8 h at 70% | 11.20 kWh |
| 6 kW | 3.5 | 1.71 kW | 8 h at 70% | 9.60 kWh |
| 6 kW | 4.0 | 1.50 kW | 8 h at 70% | 8.40 kWh |
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.