Geothermal Heating and Cooling Service

Geothermal heat pumps use the stable temperature of the earth below the frost line to heat and cool your home or building. No combustion, no outdoor unit exposed to Michigan winters, and operating costs that consistently beat every other heating and cooling system on the market. It's not new technology; it's proven technology that more homeowners are finally taking seriously.

Therma-Tech designs and installs ground-source geothermal heat pump systems for residential and commercial properties across Southeast Michigan. If you're building new, planning a major renovation, or sitting on enough land to make geothermal work, it's worth a real conversation.

Licensed in

Michigan

Fully

Insured

Energy Star

Certified

Amana Authorized Dealer

Bosch Authorized Dealer

10 Year Labor

Warranty

Frequently Asked Questions

  • It depends on your property, the loop configuration, the size of the building, and the distribution system. Residential installations typically cost significantly more than a conventional furnace and AC replacement — but a 30 percent federal tax credit applies to the full installation cost, which meaningfully reduces the net number. We'll give you a real estimate after seeing your property, not a ballpark that ends up being nowhere close.

  • The ground loop is typically warranted for 50 years and in practice lasts much longer — there's nothing mechanical in the ground, just pipe and fluid. The indoor heat pump unit has a lifespan of 20 to 25 years on average, which is longer than a conventional furnace or air conditioner. You're essentially installing the last heating and cooling system your building will need for the foreseeable future.

  • Very well. This is actually one of the most common misconceptions about geothermal. The system doesn't pull heat from the outdoor air — it pulls from the earth below the frost line, where the temperature is stable year-round regardless of what's happening above ground. A geothermal system performs just as efficiently on a Michigan day that hits negative 10 as it does in October.

  • A residential geothermal installation typically takes three to five days for the ground loop work and one to two days for the indoor equipment. Commercial installations and larger properties take longer. We'll give you a realistic project timeline as part of the estimate process.

  • In many cases, yes. If your home has forced air ductwork, a geothermal heat pump can connect to that distribution system. Homes with hydronic baseboard or radiant systems can also work well with geothermal. The main consideration is whether the existing distribution system is sized appropriately for the lower supply temperatures that geothermal typically operates at. We'll assess the existing system as part of the site evaluation.

  • We're based in Milan and cover Southeast Michigan from the Ohio state line north through Monroe, Adrian, Jackson, Ann Arbor, Ypsilanti, the Detroit Metro area, and up to Flint. A travel fee applies beyond 20 miles from our base. Not sure if you're in range? Call or text and we'll tell you straight.

  • "Furnace went out on a Wednesday night in January. Called at 8pm half expecting to get a voicemail. He picked up, was there within two hours, and had it running before 11. Didn't charge me a penny extra for the time. That's rare."

    — Kevin in Monroe

  • "Had a new dual fuel system put in last fall. He walked me through exactly what I was getting and why, didn't oversell me, and the install was clean. Heating bills are down noticeably compared to last year."

    — Brenda in Tecumseh

  • "Our walk-in went down on a Friday before a busy weekend. He came out same day, diagnosed it fast, and had us back up before dinner service. Knows commercial equipment cold. Won't use anyone else."

    — Tony in Saline

  • "I'm picky about who I let in my house. He was on time, explained what was wrong without talking down to me, fixed it, and cleaned up after himself. Straightforward guy. Exactly what you want."

    — Sandra in Ann Arbor

Ready to Get It Fixed?One Call Covers It All.

Call, text (734) 276-8825, or fill out the form. We cover Southeast Michigan from the Ohio line to Flint, show up in a 2-hour window, and never charge extra for after-hours calls.