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Top-Rated Geothermal heating or cooling system installers in Harmony - Updated Nov 2026

D&K Mechanical
5.0(
1
)
Geothermal Heating or Cooling System - Install

Serving Harmony, CA and surrounding areas

Approved

In business since 2023

Credit card accepted

Offers commercial services

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Interior of Residential unit
Exterior of Residential Unit
Neat Wiring
Neat Wiring/Connection 2
Tidy Wiring and Pipe Design

+15

Response time11 hrs
Avatar for North Alabama Technical Services
North Alabama Technical Services
4.9(
124
)
Geothermal Heating or Cooling System - Install

Serving Harmony, CA and surrounding areas

In business since 2010

Emergency services offered

Credit card accepted

"Mr. Ferrell first connected his computer to my computer via internet and worked for quite a few hours trying to determine what exactly was wrong. The next day he continued working from his computer for several hours. He determined he would have to have my desktop tower to complete the repair. He and my son met in Huntsville to exchange the tower. He then cleaned up a lot of what was wrong and reloaded Windows 10. He deleted the D: drive which had way too much memory allotted to it. The tower was returned and I plugged it all back together and it is working better than it did when I first purchased it. I would use him again and I recommend him highly to anyone needing computer updating and/or repair. His work is warrantied and he is very personable, knowledgeable, and helpful."
2014 Super Service Award Winner!
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Recommended by97%of homeowners
John Dittenhoefer
5.0(
7
)
Geothermal Heating or Cooling System - Install

Serving Harmony, CA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"We needed a contractor to help us through an extensive remodel of our home, including: Installing an EVSE unit to charge our car; complete renewal & relocation our HVAC system; replumbing gas/water lines & installation of tankless water heater; and all aspects of a major kitchen remodel (removing walls, framing new walls, raising a dropped ceiling, lights, flooring, etc.). In all cases Dittenhoefer Construction (DC) came through with flying colors. In particular the HVAC: we had 4 companies review our situation and ONLY DC offered an approach that accomplished all objectives. We were delighted with the quality, timeliness & cost of what had seemed to be an impossible project. In fact, 1 company said it couldn't be done. But we've had 11 months of living in a home with quiet, efficient, economical HVAC to prove them wrong! Thank you, DC Team. We could go on & on about their skills. A strength that we especially appreciated is they made suggestions that, without exception, offered something we hadn't seen or thought about. Their expertise & knowledge can't be overstated. Lastly, the DC team treated us with respect, cleaned up after each day, & overall were a pleasure to have in the house. We look forward to our next project with them!"
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Recommended by100%of homeowners
Avatar for Air Care Heating & A/C
Air Care Heating & A/C
5.0(
4
)
Geothermal Heating or Cooling System - Install

Serving Harmony, CA and surrounding areas

In business since 2009

Free estimates

Credit card accepted

"Dave did an excellent job. I especially appreciated the fact that he came out and did the work himself rather than sending a crew. He did more than one follow up with me and his rates were extremely reasonable. I would highly recommend him to anybody that’s having issues and or would like installation of a heating and air system."
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+5

Recommended by100%of homeowners
Avatar for Mega Power Electric, Inc
Mega Power Electric, Inc
5.0(
191
)
Geothermal Heating or Cooling System - Install

Serving Harmony, CA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"Mega Power Electric is an excellent company to work with. Gary and his team are knowledgeable, honest, and will go out of their way to get the job done right. We installed panels and solar battery storage unit in our home and we're reaping the benefits of being clean and green."
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+32

Recommended by100%of homeowners
Paul W Bennett, Jr.
4.7(
33
)
Geothermal Heating or Cooling System - Install

Serving Harmony, CA and surrounding areas

In business since 2009

Free estimates

Credit card accepted

"Paul Bennett s company was quick to give its estimate whereas the other company took almost a week to respond. We encountered a problem with the water heater having to be removed to replace the furnace. Since it was old, I asked them to quote a replacement. They replaced both the furnace and the water heater to my tenants and my complete satisfaction. I would highly recommend this company. In fact my management company told me they have added them to their vendors list."
HVAC
HVAC
HVAC
HVAC
HVAC

+58

Response time1 day
Recommended by96%of homeowners
Avatar for Kenneth's Heating and Air
Kenneth's Heating and Air
4.0(
19
)
Geothermal Heating or Cooling System - Install

Serving Harmony, CA and surrounding areas

In business since 2012

Free estimates

Emergency services offered

"Another company worked on my heater twice and did not resolve the problem which was that the heat would not always come on as scheduled. Kenneth's identified the real cause of the problem and fixed it. He also noticed a conduit connection going into the roof was separated where rain could enter. He fixed that, too. Two other companies wanted to sign me up as a preferred customer (for a significant fee) for privileged service. I consider that to be unfair to customers not signed up but have an emergency need. Kenneth's did not try to sign me up to such a program. Kenneth's gave me prompt service and solved the problem at a reasonable price. Kenneth's is now my preferred go-to HVAC servicing company."
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+1

Recommended by81%of homeowners
RCC handyman
5.0(
7
)
Geothermal Heating or Cooling System - Install

Serving Harmony, CA and surrounding areas

Emergency services offered

"Phenomenally. Robert & his team installed new flooring, painted several bedrooms, installed ceramic tiling in my bathroom, a walk in shower, and bathtub. Also installed hardwood floor in kitchen & bedrooms. I’m beyond happy with the outcome of the work. If you’re needing work done around your home, definitely give him a call. Extremely polite, respectful & great communication as well."
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+13

Recommended by100%of homeowners
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