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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

"We had an install from Greenwood in our new home and it is amazing! The staff was so kind and cleaned everything up, and the AC and heat works great. This is a company I would highly recommend!"
Signature Install
Greenwood Plumbing
Greenwood Fleet
Greenwood University
Response time11 hrs
Response rate100%
19 neighbors recently requested a quote
Avatar for Air Masters Inc
Air Masters Inc
4.6(
181
)
Geothermal Heating or Cooling System - Install

Serving Seattle, WA and surrounding areas

Approved

In business since 1986

Free estimates

Emergency services offered

"Completely removed old heating system and installed new heat pump system in 2 days. Customer rep followed up with an installation verification and provided system details. All work was professional quality and technicians were very courteous and professional."
Installation of Ductless Heat Pump AC System
Gas Furnace Installation
Another Happy Air Masters Heating and Cooling Client with their new Lennox Heat Pump System
Another Happy Air Masters Heating and Cooling Client with their new Lennox Heat Pump System
Furnace System Installation.  Call Air Masters Heating & Cooling for your next HVAC upgrade or replacement.

+46

Response time2 days
Response rate100%
4 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

"I had three estimates at our house for our conversion from a gas forced-air furnace to a heat pump/gas furnace installation.  I was most impressed by Evergreen's rep. Scott, as he was very helpful in explaining the technology and was the only one of the three to do a J load calculation on our home.  I also felt after the estimates were all given that Evergreen's was the best buy in terms of the product features vs. overall cost.   As I researched our installation I realized that my mother's all-electric home would be better served by a heat pump as well.  Again, Scott did the best job of all three estimators there as well.  

After the down payment of 50% of the cost the installation was set up within two weeks for both locations.  The work was done on time and efficiently.  My mother's job was done in a few hours, mine took a couple of days.  I'm happy to say that both units are performing perfectly, through both the colder weather of March and the warmer than usual days we've had in April.  

There were a couple of things that should be mentioned, not major issues but worth noting.  

The installation of our heat/pump and furnace did not meet City Code on the initial inspection as the condensation pump was placed on the floor.   City code required it to be 18 inches off the floor due to a potential for an explosion should there be a gas leak.  The correction was done within a few days, but I did have to schedule a city inspector on two different days.   The city inspector remarked that the installer 'should have known better'.  

On my mom's split heat pump the indoor blower unit began making a loud clanking noise one month into use.  Evergreen was quick to come out, mom called on Sunday morning and was able to have a crew come out the next day.  Apparently the installers had missed a mounting clip on the external cover of the indoor unit and over time the casing sagged enough that the rotating fans began to hit the inside of the case.  

Several weeks after our work was done I was called by the financial office asking me to pay the remaining 50% balance.  I pointed out that it had been paid on the day the work was done, but apparently the payment was not correctly registered as having been paid by their accounting office.  Fortunately I was able to point to my credit card statement indicating that the balance had been paid in full.  

Overall Evergreen did a professional job from start to finish and I have no hesitation in recommending them.  Given their expertise and experience I have no doubt that my equipment will continue to be well serviced going forward.  "
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+9

Response time5 hrs
Response rate100%
2 neighbors recently requested a quote
Avatar for Day & Nite Plumbing & Heating, Inc.
Day & Nite Plumbing & Heating, Inc.
4.3(
225
)
Geothermal Heating or Cooling System - Install

Serving Seattle, WA and surrounding areas

Approved

In business since 1954

Emergency services offered

Warranties offered

"I purchased a new Navien NPE-240A2 Tankless Water Heater and had it installed. I'm loving the new water heater. It replaces an old Noritz tankless that died just before this installation. The on-site estimate was what sold me. Ken went through all the details and answered a lot of questions from me. Zachary came out with Austin and performed the installation just like I discussed with Ken. Zachary kept me in the loop throughout the installation to ensure I was in agreement with how it was going. Zachary always had my interest at heart and ensured no corners were cut. The installation is much cleaner, and more correct than the previous tankless company did. Zachary even listened to my concern about the astectics of the exterior exhaust and quickly found an easier and cleaner looking way to address my concern. He also removed an old recirculation pump and replaced a new main house shutoff valve. The entire area was treated respectfully and left cleaner than they found it."
Outdoor Ductless Unit
Indoor Ductless Unit
Outdoor Ductless lineset and Unit
Pump System
1 neighbors recently requested a quote
Recommended by82%of homeowners
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
23 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
3 neighbors recently requested a quote
Recommended by96%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

"In June of this year I contracted with a large company to install a new heat pump at our residence.  While overall I felt they did a fairly decent job there were at least three instances of inconsistent service, attention to detail and disappointment.  The most disappointing aspect of that company's performance was when it came time to "test" my existing insulation and duct work.  I believed there bid to correct my existing ducts and insulation was outrageous.  That said, I was in between a rock and a hard place.  I had just installed a $12K heat pump and I feared any efficiencies I may have gained could be lost due to my existing ducts and insulation.
I contacted 5 companies to provide me with bids, in addition to the upsell price I was previously provided by the company I had install the heat pump.  All five companies are listed on Angie's List.  They all provided fairly consistent bids.  They all helped educate me on what I may need to resolve my existing duct and insulation issues.
Daniel was the final contractor I spoke with.  He showed up early afternoon, looking a bit haggard, as if he had just emerged from a crawlspace - he had.  I was somewhat tentative at first, but I knew I had found the right man for the job the minute he began outlying in detail everything he saw, what he would recommend, how he would address my specific issues and what it would cost.  He was upfront from the get go, wanting to work with my budget and my timetable.  
Daniel and his team showed up three days later and worked 12 hours on a Saturday in 85 degree heat, completely insulating the crawlspace of a 2,000 sf home.  He was back the next day to finish up, working another 7 hours, again in 85 degree heat.  He pointed out certain issues he found along the way, specifically some holes that needed patching with mesh and sealing all gaps in my flooring from the crawlspace.  He sealed all the ducts, adding screws where necessary.  He even sealed the holes drilled by the company who installed the heat pump (one example of their service inconsistency).
Daniel is an extremely hard worker.  I have the utmost respect for his abilities and would recommend him to anyone looking to have any type of crawlspace / insulation work done.  Sure, shop around, talk to the various companies on Angies List, get educated and then do what I did, call Daniel last, negotiate a price and get the job done right.


"
hard workers
after
after
Recommended by100%of homeowners
Avatar for Home Comfort Alliance
Home Comfort Alliance
4.7(
341
)
Geothermal Heating or Cooling System - Install

Serving Seattle, WA and surrounding areas

In business since 1977

Free estimates

Emergency services offered

"Excellent experience with this company & the purchase & install of a new ductless heat/ac system for our entire house & necessary electrical work. Passed the electrical change inspection with flying colors by state L & I inspector. Arrived promptly and finished same day with great attention to detail, explainations & clean up."
Additional Photos
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+1

Response time1 day
Response rate100%
Recommended by91%of homeowners
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