Geothermal (COP 4.2) vs. Air-Source Heat Pump in Illinois (2026)

15-to-25 Year Equipment Lifespan & Utility Payback at 16.4¢/kWh (ComEd / Ameren Illinois)

Head-to-Head Lifespan & Operating Cost Comparison (2,000 Sq Ft in Illinois)

Option A: Geothermal Ground-Source (25-Yr Unit / 50-Yr Loop)Install: $18,500 | Lifespan: 25 Yrs
Option A Annual & Monthly Utility Bill:$626/yr ($52/mo)
Option A 15-Year Total Cost (Install + 15 Yrs Bills):$27,890
Option B: Air-Source Heat Pump (15-Yr Lifespan)Install: $6,800 | Lifespan: 15 Yrs
Option B Annual & Monthly Utility Bill:$847/yr ($71/mo)
Option B 15-Year Total Cost (Install + 15 Yrs Bills):$19,505
Illinois Tariff & Break-Even Threshold:16.4¢/kWh Elec | $1.25/therm Gas (Break-Even: 14.4¢/kWh)
15-Year Net Lifespan Verdict in Illinois:Air-Source Heat Pump saves $8,385 over 15 years
Interactive Geothermal (COP 4.2) vs. Air-Source Heat Pump Graph in Illinois →
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DIY Pre-Charged Ductless Mini-Split Kits

Avoid $3,500+ in ductwork labor. Calculate exact multi-zone mini-split BTU capacity for your 2,000 sq ft Illinois home.

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Illinois Solar + Heat Pump Net-Zero Calculator

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