Residential and Commercial Water Heater Service.

Water heater technology has changed a lot in the last decade. Tankless and on-demand systems have gotten more reliable, more efficient, and more practical for a wider range of homes and businesses. If your tank water heater is aging out, it's worth understanding your options before defaulting to a straight replacement.

Therma-Tech installs and services the full range of water heating equipment, traditional tank heaters, tankless on-demand systems, and commercial water heaters for businesses and multi-unit properties. We'll tell you what makes sense for your situation and install it right.

Licensed in

Michigan

Fully

Insured

Energy Star

Certified

Amana Authorized

Dealer

Bosch Authorized

Dealer

Frequently Asked Questions

  • Most residential tank water heater replacements take two to three hours from start to finish. Tankless installs take longer — typically a half day to a full day depending on whether gas line work is needed. We'll give you a realistic time estimate before we start.

  • or a tank unit, size is based on household size and peak demand — typically a 40-gallon unit for one to three people and a 50-gallon unit for three to five. For tankless, sizing is based on flow rate and temperature rise needed simultaneously. We'll assess your situation and recommend the right size — not the biggest unit we can sell you.

  • For the right home, yes. The operating cost savings over a 15 to 20 year lifespan often offset the higher installation cost, especially with rising gas prices. The bigger factors are whether your gas line can support the demand and whether you're planning to stay in the home long enough to see the payback. We'll help you run the numbers honestly.

  • Yes. Gas line upgrades are part of what we do. If your existing gas line can't support a tankless water heater's demand, we'll run a new line as part of the installation. No need for a second contractor.

  • Yes. We hold five Michigan mechanical licenses under State License #7119108 and carry $6 million in liability insurance. That's not standard for a company our size, we doubled our coverage to meet the requirements of major property managers we work with. You're covered.

  • We're based in Tecumseh 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.