Skip to main content
Compare HVAC Pro
Browse AreasHow It WorksFAQ
  • Browse Areas
  • How It Works
  • FAQ

Compare HVAC Pro

Local market research for homeowners. We help you evaluate licensed providers, understand pricing, and request quotes without pressure. Sponsored and featured listings are clearly labeled.

Popular Markets

  • HVAC near me
  • Washington state
  • Oregon state
  • Seattle, WA
  • Portland, OR
  • Spokane, WA
  • Tacoma, WA
  • Salem, OR

Research

  • How it works
  • Service categories
  • Financing
  • Cost calculator
  • State of HVAC 2026
  • FAQ

Guides

  • How to Read an HVAC Quote
  • Heat Pump vs Furnace
  • The 2025 Federal HVAC Tax Credits
  • HVAC Financing 101
  • Seasonal HVAC Maintenance Checklist
  • HVAC Not Cooling? 7 Things to Check Before Calling
  • Sizing an HVAC System Correctly
  • How to Spot HVAC Scams
AboutEditorial PolicyContributorsMethodologyContactCorrectionsPrivacy PolicyTerms of ServiceSMS TermsCookie PolicyAffiliate DisclosureDo Not Sell My Info
© 2026 Compare HVAC Pro. All rights reserved.comparehvacpro.com

We use cookies for analytics to understand how the site is used. No ads. No data sold. Details.

  1. Home
  2. Janesville, WI
  3. Don-Martin Heating, Cooling & Geothermal Inc.

Don-Martin Heating, Cooling & Geothermal Inc.

Don-Martin Heating, Cooling & Geothermal Inc. is a HVAC provider serving Janesville, WI. Rated 5.0★ with 26 Google reviews. See services, review signals, and request a quote.

5.0★ (26 reviews)HVACJanesville, WI
On this page▾
  1. 1.Company overview
  2. 2.Photos
  3. 3.What customers say
  4. 4.Key highlights
  5. 5.Explore nearby research
  6. 6.Frequently asked questions

Company overview

  • TradeHVAC
  • Service areaJanesville, WI
  • Google rating5.0★ (26 reviews)
  • Phone(608) 758-9882
  • AddressJanesville, WI 53545, USA

Photos

  • Don-Martin Heating, Cooling & Geothermal Inc. photo 1

Photos from Don-Martin Heating, Cooling & Geothermal Inc.

What customers say

★★★★★

“My A/C unit kept freezing up on the inside and would stop working. I called up Don Martin and scheduled a time for a technician to come service the unit. Clay was able to diagnose the issue and had it…”

— Josh E, a year ago
★★★★★

“Clay was very responsive and very helpful with estimate and timeframe of installation. He got my family all setup with a new furnace and central air unit. Thanks to Sam and Cliff for setting it up. Th…”

— Ryan Wescott, 3 years ago
★★★★★

“Spoke with Clay, he was very helpful in getting me in touch with folks that could help with my mechanical problem and questions. I was out of his area of Service, by about 80 miles. But Clay took th…”

— Paul Perschon, 4 years ago
★★★★★

“Called Don-Martin Heating, Cooling & Geothermal in the morning and they were able to have a technician come out the same afternoon to look at my a/c unit. Sam, the technician was very professional an…”

— Nicholas Bruhnke, 8 years ago
★★★★★

“Great company! Had no heat, called and got me in as soon as possible. Got here earlier than appointment time! Found the problem quick. (Even put up with our animal thinking his tool box was a playg…”

— damon hintzman, 7 years ago

Key highlights

Strengths

  • Highly rated (5.0★ average)

Things to ask

  • Confirm availability for your area and timeline
  • Ask about warranty terms on parts and labor
  • Request a written estimate before work begins
  • Ask about payment plans or financing

Explore nearby research

  • Janesville, WI HVAC pros
  • Best HVAC in Janesville
  • HVAC cost in Janesville
  • Best HVAC in Milwaukee, WI
  • Best HVAC in Madison, WI
  • Best HVAC in Green Bay, WI
  • Best HVAC in Kenosha, WI

Frequently Asked Questions

  • What services does Don-Martin Heating, Cooling & Geothermal Inc. offer?

    Don-Martin Heating, Cooling & Geothermal Inc. provides: HVAC diagnosis, repairs, and full system installs. They serve residential and commercial customers in Janesville, WI.

  • What is Don-Martin Heating, Cooling & Geothermal Inc.'s rating?

    Don-Martin Heating, Cooling & Geothermal Inc. has a 5.0 out of 5 star rating based on 26 Google reviews.

  • Is this company licensed in Wisconsin?

    All listed providers have a verified Wisconsin contractor license at time of publication. You can verify on the Wisconsin Department of Safety and Professional Services (DSPS) — Dwelling Contractor certification (plus municipal HVAC licensing) lookup at https://licensesearch.wi.gov/.

  • Does Don-Martin Heating, Cooling & Geothermal Inc. offer emergency service?

    Contact them directly to ask about emergency availability and after-hours service.

  • How do I request a quote?

    Use the CTA below to submit your ZIP. You can message this company alongside two or three other local pros for easy comparison.

✓ Licensing verified 2026-04-23. Reviews refreshed 2026-04-23.

Licensing data: Wisconsin Department of Safety and Professional Services (DSPS) — Dwelling Contractor certification (plus municipal HVAC licensing) · Company data: verified business records + Google Business profile

See our editorial standards · Report inaccurate info about Don-Martin Heating, Cooling & Geothermal Inc.

Request a quote from Don-Martin Heating, Cooling & Geothermal Inc.

Enter your ZIP and we will line up a free estimate alongside other top local pros.

Compare HVAC Pros

Own or manage this business? Claim this listing to earn a verified-owner badge.