The efficiency math
Electric baseboard heaters are 100% efficient — every watt becomes heat. Mini split heat pumps with HSPF 10 deliver about 290% efficiency over a heating season. That means 1 kWh of electricity moves about 3 kWh of heat into your house.
Side-by-side cost
For a 2,000 sq ft cold-climate home using 60,000,000 BTU/year:
- Electric baseboard: 17,580 kWh × $0.17 = $2,989/yr
- Mini split (HSPF 10): 6,000 kWh × $0.17 = $1,020/yr
- Yearly savings:$1,969
At a $5,000 installed cost, the simple payback is about 2.5 years — before any rebates.
When baseboard still makes sense
- Rarely-heated spaces (workshop, sunroom, guest cabin).
- As emergency backup heat for the mini split during -20°F snaps.
- Tiny additions where the install cost can't be justified.
Stack the rebates
Stack state rebates ($500-$2,000 in many states), utility rebates ($300-$1,500), and DOE Home Energy Rebates in states with open programs — combined incentives can reach several thousand dollars. The federal 25C tax credit ended December 31, 2025.
Try the calculator
Mini Split Savings Calculator
Estimate savings from switching to a high-HSPF mini split heat pump.
DIY safety & liability notice
This guide is for general information only. Any work you do on your home is at your own risk. Energy Savings Toolkit is not responsible for improper installation, property damage, or injury. Follow product instructions and local codes, and hire a licensed professional for electrical, gas, HVAC, roofing, or structural work. See our Disclaimer.