The Most Efficient Home Energy System on Earth.
Geothermal systems tap the earth's constant underground temperature to heat and cool your home at 400–600% efficiency. It's the gold standard in home energy performance, and ComEd rebates up to $6,000 help bring the cost down.
Get My Free Estimate400–600%
System Efficiency
$6,000
ComEd Rebate Available
25+ yr
System Lifespan
50+ yr
Ground Loop Warranty
Why It Works
At 400–600% efficiency, geothermal delivers more heating and cooling energy per dollar than any other system available.
Illinois homeowners can claim up to $6,000 in ComEd geothermal rebates. That is the single largest equipment rebate ComEd offers.
Geothermal is the premium energy upgrade. Buyers in the Illinois market recognize and pay a premium for geothermal-equipped homes.
With no outdoor equipment exposed to weather and a buried ground loop, geothermal systems require minimal maintenance over their long lifespan.
The SPM Approach
Geothermal replaces every BTU of gas or electricity your HVAC currently consumes with earth-sourced energy at 400–600% efficiency. For larger Illinois homes with high heating loads, it's often the single highest-ROI energy upgrade, especially when done before sizing solar so the system is matched to your dramatically lower remaining energy need.
See the Full Energy Plan BuilderThe Process
We evaluate your property size, soil type, and existing system to determine the optimal loop configuration: horizontal, vertical, or pond/lake.
Our engineers design a geothermal system sized precisely to your home's heating and cooling load for maximum efficiency.
Our drilling or excavation crew installs the ground loop. Work is typically completed in 1–3 days depending on loop type.
The indoor heat pump unit is connected to the loop and your home's duct system, then commissioned and tested before handoff.
FAQ
Geothermal systems achieve efficiencies of 400–600%, meaning they deliver 4–6 units of heating or cooling energy for every 1 unit of electricity consumed. This is significantly more efficient than even the best air-source heat pumps (which run 200–400%), and far more efficient than any gas furnace.
The 30% residential energy tax credit (Section 25D) expired December 31, 2025 under the One Big Beautiful Bill Act. Illinois homeowners can still access the ComEd geothermal rebate of up to $6,000, the Illinois 20-year property tax exemption, and Illinois Shines SREC income if paired with solar. Commercial geothermal projects may also qualify for the Section 48E commercial ITC, but construction must begin by July 4, 2026.
It depends on your property. Horizontal loops require trenching across your yard (usually 4–6 feet deep). Vertical loops use smaller bore holes and need much less surface area, making them a better fit for smaller lots. SPM evaluates your property and recommends the right loop configuration.
The indoor heat pump unit typically lasts 25+ years. The ground loop is warranted for 50 years but can last 100+ years, since it's buried and protected from weather, UV, and mechanical stress.
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