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

Avatar for Greenwood Heating and Home Services
Greenwood Heating and Home Services
4.6(
425
)
Geothermal Heating or Cooling System - Install

Serving Seattle, WA and surrounding areas

Approved

In business since 1921

Emergency services offered

Warranties offered

"Worked with Greenwood Heating and Air on a furnace replacement and only have excellent things to say about the company and team. Customer service, pricing, timeliness, thoroughness, and friendliness were top notch. Contacted them initially for an inspection of our 28-year old furnace. The technician Frej was prompt, thorough, and courteous, explaining in detail the issues we might face with this still working but old units. Based on the findings we reached out for a quote on a system replacement. Lori took diligent care in listening to our concerns and hopes for a new system, recommending systems that might work for our household. She was always available for follow-up questions, providing answers that really helped us decide on getting a new system (Trane XC80 furnace with air scrubber) via Greenwood H+A. Prices were fair, on par with expectations and quotes from other businesses. On the day of the install, the team at Greenwood H+A, including Jake, Jordan, and Jason were very flexible, coordinating with the roofing company we had hired to take down our chimney and replace with a vent, to get the project moving on time. They were all very communicative, which we appreciated, and gave us regular updates on the progress. They finished what seemed like a big job within the day, despite the install occurring in our cramped crawl space. Our house is now toasty warm again with a great new furnace and all the bells and whistles. Would definitely recommend them for similar job, including for custom requirements as was our case with the roof. Thanks!"
Signature Install
Greenwood Plumbing
Greenwood Fleet
Greenwood University
Response time11 hrs
Response rate100%
18 neighbors recently requested a quote
Avatar for Evergreen Home Heating & Energy
Evergreen Home Heating & Energy
4.4(
106
)
Geothermal Heating or Cooling System - Install

Serving Seattle, WA and surrounding areas

Approved

In business since 1975

Free estimates

Emergency services offered

"Evergreen installed a new hybrid heat pump system in my house. After researching the options, Evergreen was not only the most reasonable price, but they also scoped out a hybrid system where they would install new duct work and a single air exchanger in the attic and a minisplit in the basement. Scott, the sales person, did not try to upsell me on number of zones (others tried to get me to get 2 units in the basement) and after 2 months with the system, the single unit in the basement is heating the whole basement to our needs. All this was done at a price still considerably lower than the "standard" system price being offered by one of the bigger, similarly named companies. Evergreen was also the only company to propose a hybrid system where they would install a single exchanger in the attic and run new ceiling ducts to the rooms. This was appealing because we don't need to have the cassettes in each room and we didn't need to line the outside of the house with conduit for the cassettes (also the bathroom gets heat, too). Scott was great to work with, answered all my questions, and did his best to size the system correctly. Installation was smooth. There was a small hiccup where the installer accidentally broke a basement window, but Evergreen squared it away. Don and his team were great and the inspections passed. After install support has been great. Denise has been responsive to my questions. Overall, the experience was great with Evergreen and I highly recommend them."
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+9

Response time5 hrs
Response rate100%
2 neighbors recently requested a quote
Avatar for THE JANES COMPANY, INC.
THE JANES COMPANY, INC.
5.0(
6
)
Geothermal Heating or Cooling System - Install

Serving Seattle, WA and surrounding areas

Approved

In business since 1990

Free estimates

Warranties offered

Janes Radiant Heating is family-owned and specializes in high-efficiency radiant heating systems across Western Washington. We provide emergency boiler repair services for households throughout the Puget Sound area, the Islands, and the Peninsula. With over 35 years of experience and 20,000 installations under our belt, you can trust that our radiant heating experts will work hard to get your system up and running again. \n\nWe are the state's first and largest major installer of radiant floor heat systems. Whether you need an installation in a new or remodeled home, or an upgrade to an existing system in your current home, we bring unmatched knowledge, craftsmanship, and commitment to every project.\n\nOur showroom and warehouses are located in Mukilteo, WA, and our team of factory-trained, specialized technicians is stationed throughout our service area, with the most common parts on their trucks. Our friendly service team is here, ready to take care of you!

Boiler installation
Bellingham Boiler Upgrade
22 neighbors recently requested a quote
Avatar for Blue Flame Heating and Air Conditioning
Blue Flame Heating and Air Conditioning
4.6(
840
)
Geothermal Heating or Cooling System - Install

Serving Seattle, WA and surrounding areas

In business since 1994

Free estimates

Emergency services offered

"The installation did not go well at all. The installers were here all day and they tracked mud through our garage. They also did a sloppy job of installing the lines on the wall in the laundry room. The system didn't work so they called a technician to come check. The tech, Tobias, complained that we woke him up. He was very grumpy and we could hear him having angry conversations on his cell phone. He determined that the installers installed the air system upside down! The system worked backwards - heat came out through the intake vents and drew air from the heat vents! He complained to us that this had happened before. The installers returned a day or two later and were here all day fixing their mistakes. They joked with us that we should get an awesome service contract. Then the system required fine tuning and another tech (Chris, a very nice guy) was here multiple times tinkering with the system. When we called our sales rep, we were told he doesn't work there anymore. We requested to talk with the business owner, and were promised a phone call, which never came. On top of all that, the heat pump is SO LOUD and I wish our rep had explained to us how noisy it would be. At the end of the day, I sometimes wish I would have spent the additional few thousand dollars and hired Greenwood Heating and Air. Blue Flame had the best quote and the friendliest sales rep. But the installation was a sh!tshow and I cringe every time that heat pump turns on which I can hear from inside my house."
High-efficiency natural gas furnace installation
Recommended by91%of homeowners
Avatar for AAA Heating & Air Conditioning
AAA Heating & Air Conditioning
4.8(
237
)
Geothermal Heating or Cooling System - Install

Serving Seattle, WA and surrounding areas

In business since 1989

Free estimates

Emergency services offered

"I have used AAA Heating and Cooling for many years. Colby has come out to my house on a number of occasions. He is always on time, friendly and professional. He is informative but doesn't try to sell me things I don't need."
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Our Service Center
Response time1 day
4 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for CARDINAL HEATING & AIR CONDITIONING
CARDINAL HEATING & AIR CONDITIONING
4.7(
54
)
Geothermal Heating or Cooling System - Install

Serving Seattle, WA and surrounding areas

In business since 1991

Free estimates

Emergency services offered

"The work was flawless. Estimator arrived on time, was knowledgeable, performed heat loss calculation to ensure new unit was sized properly, prepared estimates for 3 different options. Work was scheduled and completed within days of signing the estimate. Technicians called to give me status on their arrival, worked fast and efficiently, were professional and clean. Great communications. They found a clever way to install the venting without damaging ceiling in adjacent room. The surrounding area was spotless after they left.



Couldn't ask for a better experience. Highly recommended.
"
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+13

Recommended by86%of homeowners
Avatar for SOS Crawl Space Insulation
SOS Crawl Space Insulation
4.8(
77
)
Geothermal Heating or Cooling System - Install

Serving Seattle, WA and surrounding areas

In business since 2011

Emergency services offered

"They worked hard and did the attic in two visits and the crawl in two more.  They were courteous, honest, and very hard working.  Their work looks good and we have noticed an improvement in due to the insulation they put in for us.  They were far cheaper than other outfits that bid on our job, but I felt as if they did a very professional job.  Overall I would happily recommend them to you for an affordable, quality job.
Two points that were less than perfect: (1) The sealant they used on the roof was not of a matching color so it is not attractive.  Daniel said our color was not available.  (2)  When they did the work in the crawl they did not warn us about the dust or seal our floor vents so a lot of dust blew up into the house before we thought to cover the vents ourselves.   Other than that, a good job that was well worth the price!
"
hard workers
after
after
Recommended by100%of homeowners
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