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Best boiler installation pros near Seattle, WA

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Top-Rated Boiler installation pros in Seattle - Updated Nov 2026

Avatar for Day & Nite Plumbing & Heating, Inc.
Day & Nite Plumbing & Heating, Inc.
4.3(
225
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

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
2 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for Air Masters Inc
Air Masters Inc
4.6(
181
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

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%
7 neighbors recently requested a quote
Avatar for Cummings, Inc.
Cummings, Inc.
4.3(
282
)
Gas Boiler or Radiator Heating System - InstallElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install - For Business+2 more

Serving Seattle, WA and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Received 4 quotes. Cummings was the least expensive that I used to bargain two others to. They matched but had install dates of 30 days. Cummings had their electricians and HVAC guys here in 8 days. Installation done in 4 hours. All had good customer service & tech skills."
Coleman Furnace
Heat Pump Replacement
Heat Pump Install
Change out a Coleman Furnace
Boiler system

+1

Response time9 hrs
Response rate97%
232 neighbors recently requested a quote
Avatar for Airpros Energy
Airpros Energy
4.7(
89
)
Boiler or Radiator Heating System - Install or Replace

Serving Seattle, WA and surrounding areas

Approved

In business since 1994

Free estimates

Emergency services offered

"Mark and his guys helped us install a new AC last summer. They arrived on time and did a great job! So when I was looking for someone to do the maintenance of our furnace, I called them. Todd went above and beyond my expectations. He finished the job and even helped fix my hinge. Both Mark and Todd strike me as very genuine people. And I would definitely hire them again!"
Comfort Built for the PNW
2 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Evergreen Home Heating & Energy
Evergreen Home Heating & Energy
4.4(
106
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

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 THE JANES COMPANY, INC.
THE JANES COMPANY, INC.
5.0(
6
)
Gas Boiler or Radiator Heating System - InstallOil Boiler or Radiator Heating System - InstallElectric Boiler or Radiator Heating System - Install+2 more

Serving Seattle, WA and surrounding areas

Approved

In business since 1990

Free estimates

Warranties offered

"Jane's replaced my 20-year old Munchkin boiler with a super efficient, modern Rinnai. Everyone was a joy to deal with. Service was excellent. Darian, who scheduled and arranged the replacement, and Greg and Oscar (who did the work) were fantastic. Excellent service, especially since I live on Lopez Island, which is not easy to get to. Competent, good-natured, hard-working, nice folks."
Boiler installation
Bellingham Boiler Upgrade
23 neighbors recently requested a quote
Avatar for All Pro Plumbing Northwest, LLC
All Pro Plumbing Northwest, LLC
4.5(
576
)
Gas Boiler or Radiator Heating System - Install

Serving Seattle, WA and surrounding areas

Approved

Super Service Award Winner

In business since 1994

Emergency services offered

Warranties offered

"Miguel is my new plumber from now on- he was very patient in explaining what I needed to know about the job on hand. He was very polite and made sure I was comfortable with the choice I made. He also gave me proposals for a future project (possibly changing my water heater because itâ s 11 years old now , no issues-not leaking but I want to be proactive and to increase the property value as well). I will gladly recommend him to anybody who needs a new plumber. Heâ s just down right AWESOME!"
Our Team
119 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for Lifetime Heating and Air Conditioning
Lifetime Heating and Air Conditioning
4.5(
8
)
Gas Boiler or Radiator Heating System - Install

Serving Seattle, WA and surrounding areas

Approved (Corporate)

In business since 2016

Free estimates

Emergency services offered

"I’m very pleased with the work they did. They were knowledgeable, professional, and responsive. I would definitely recommend them for all heating and cooling needs. They also service and install hot waters heaters, which we didn’t need, but I would recommend them for that as well."
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+54

8 neighbors recently requested a quote
Recommended by87%of homeowners
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Install Boiler FAQs, answered by experts

Installing a boiler requires training, a specific skill set, and extensive experience. Boiler installation can be extremely dangerous, as it involves working with water lines, gas lines, and electricity. For this reason, it’s strongly recommended that you hire a professional to install your boiler. Some states even consider it illegal to work on a boiler without the proper licensing.

The best way to compare HVAC quotes is getting a few detailed quotes from local companies with good reputations. Then, go over the quotes line by line. Protect yourself by insisting on in-person estimates that include equipment manufacturer names, model numbers, SEER ratings, amounts and numbers of materials, details of warranties on equipment and labor, and other specifics. 

Knowing the exact equipment and materials is the only way that you can fairly compare quotes. Quotes that are much lower than others can be a sign that the company isn’t providing the best quality service or materials.

All modern boilers are condensing boilers because they’re the most efficient type. Instead of extra heat leaving through the flue, these boilers trap the heat and use it to heat the house. Whether you choose a combi boiler, system boiler, or regular boiler, you can opt to get a condensing system. If you have an old boiler that’s not a condensing boiler, it’s a good idea to get an upgrade.

Always consult your manual for specific pressure numbers. Many expansion tanks come pre-pressurized at a specific PSI range, anywhere from 12 to 40 PSI, designed for a range of home boilers. You should not have to pressurize an expansion tank yourself, only the boiler system. If your system has a tank that needs to be manually pressurized, this is generally a job for professionals and their tools.

If you want to have hot water in your home and part of your plumbing system, you'll need a hot water heater. An alternative may be to heat water as you use it, such as by boiling what you need on the stove. But that's much less efficient and takes considerably longer than hooking up a water heater. Another option is to rely on appliances, such as a dishwasher or washing machine, that heat the water themselves.

The Seattle, WA homeowners’ guide to boiler installation services

From average costs to expert advice, get all the answers you need to get your job done.