Mini-Split Efficiency & Cost
Wondering how a mini split heat pump really stacks up in cold weather? This free calculator compares mini splits vs propane vs natural gas heating efficiency across outdoor temperatures, showing where each system wins on cost and performance. Enter your electric rate, fuel price, and desired indoor temperature to see real-time results for operating costs, COP (efficiency), and the break-even point where backup heat makes sense. A practical tool for DIY installers and homeowners to plan, budget, and maximize savings before committing to a system.
Energy & Temperature Efficiency Advisor
House / Load
Sources to Compare
Mini‑split (Electric)
Propane
Natural Gas
Results (at current outdoor temp)
Charts
FAQ and Calculator Information
This calculator is provided as an informational tool for DIY mini-split installers and homeowners exploring heat pump options. Actual performance will vary depending on equipment model, installation quality, insulation, and climate conditions. Use the results as a planning guide to estimate potential savings and efficiency, then confirm details with manufacturer specifications or a licensed HVAC professional. By comparing COP, fuel costs, and break-even temperatures, you can make a more confident decision before investing in a new heating system.
1. How accurate is this mini-split efficiency calculator?
This calculator gives you a close estimate of real-world performance by combining fuel costs, COP (Coefficient of Performance), and outdoor temperature. Actual results may vary depending on your home’s insulation, installation quality, and the exact model of mini-split you choose.
2. What is COP and why does it matter?
COP, or Coefficient of Performance, measures how efficiently a heat pump converts electricity into heat. A COP of 3 means you get three units of heat for every unit of electricity used. Higher COP values mean better efficiency and lower heating costs.
3. Can I use this tool to size my mini-split?
No… This calculator is meant for comparing efficiency and costs, not equipment sizing. For sizing, you’ll need to calculate your home’s heating load in BTUs, often based on square footage, insulation, and climate zone.
4. Does this calculator work for cold climates?
Yes. The tool includes presets for standard and cold-climate mini-splits, showing how efficiency changes as the outdoor temperature drops. This is especially useful for DIY installers in northern regions.
5. Should I still consult an HVAC professional?
If you’re planning a full installation, yes. This calculator is designed as a planning tool for DIY installers and homeowners to understand costs and performance, but final sizing and safety checks are best confirmed with a professional.