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Best boiler installation pros near Bothell, WA

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    Verified boiler installation services reviews

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

Avatar for Green City Heating and Air Conditioning
Green City Heating and Air Conditioning
4.7(
966
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Bothell, WA and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"It went very well. This is the third time that we have used Green City Heating & A/C. In the past two years they have installed a new gas furnace boiler, two gas fireplace inserts and now a new gas hot water heater. In each instance, Jeff and his crew have been very prompt about attending to our requests and providing us with an estimate. On the day that the work was to be done the work crew has always arrived on time and finished the job as scheduled. They have been very professional to deal with. We are very appreciative that they were able to work us into their schedule so quickly this last time as going without hot water is a bit of an inconvenience. Green City Heating is our first choice when it comes to our home's heating and water systems."
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+2

Response time2 hrs
Response rate100%
3 neighbors recently requested a quote
Avatar for Greenwood Heating and Home Services
Greenwood Heating and Home Services
4.6(
425
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Bothell, WA and surrounding areas

Approved

In business since 1921

Emergency services offered

Warranties offered

"Of the eight companies who bid, Greenwood did the best assessment of the somewhat quirky situation my old house presented. The estimator came just a few days before the big freeze in January, and they were able to schedule installation within two days. Once the installers were on site, there was some confusion re where various components would go, but a phone call to the company cleared that up within an hour. From then on the heat pump installation went smoothly and professionally, the electricians did a quick and effective job of hooking it up to the service, and the site was left clean. I did not understand at first how to operate the thermostat, given that the Mitsubishi owners manual was of limited help, and per my request a rep from the company came out a few days later to give me a tutorial about what the range of settings can do. From then on the system has operated flawlessly and lives up to its reputation."
Signature Install
Greenwood Plumbing
Greenwood Fleet
Greenwood University
Response time11 hrs
Response rate100%
19 neighbors recently requested a quote
Avatar for Airpros Energy
Airpros Energy
4.7(
89
)
Boiler or Radiator Heating System - Install or Replace

Serving Bothell, WA and surrounding areas

Approved

In business since 1994

Free estimates

Emergency services offered

"I'd been wanting to get of our old electric baseboard heaters for a long time, and replace it with something more efficient, and Mark helped my understand the differences between a ductless mini-split system and a ducted heatpump system. Even in our small house, the ducted system was the way to go. Mark and his installers were professional and efficient, and answered all my questions. When the thermostat was acting a little odd, he sent a technician over to calibrate it, free of charge. There was a small issue where I initially got the wrong specs for the electrical, and as a result I had the electrician install unnecessary circuits, but Marc reimbursed me for the cost."
Comfort Built for the PNW
2 neighbors recently requested a quote
Recommended by92%of homeowners
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 Bothell, 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 Bothell, WA and surrounding areas

Approved

Super Service Award Winner

In business since 1994

Emergency services offered

Warranties offered

"Noel replaced two water heaters and installed hot water line so I can wash car with warm water. :) Overall, I am very happy with the quality of his work. He is very patient and took time to do quality work. Before he start on the project he laid down paper on carpet to protect it and he cleaned up everything after he's done. His pricing isn't the cheapest...but I would say average. In line with what other plumbers charge to the same work. I would recommend All Pro Plumbing to anyone and would use them again if I have future plumbing work! Thanks!"
Our Team
117 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 Bothell, WA and surrounding areas

Approved (Corporate)

In business since 2016

Free estimates

Emergency services offered

"Darrick came out when no one else could and went through my Furnace and Air conditioner. The furnace was fine but found a potential problem with the air conditioner and went out of his way to get the part and fix it right away. I am now looking at having them install a new Thermostat for me. I Highly recommend them and would use them for all my needs."
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+54

8 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Overlake Heating & Air Conditioning
Overlake Heating & Air Conditioning
4.8(
335
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Bothell, WA and surrounding areas

In business since 1957

Free estimates

Emergency services offered

"

We are repeat customers and have worked with Overlake Heating & Air Conditioning for regular annual furnace inspections and a duct cleaning. We have been pleased every time and this time was no different.

I met with Rob on Monday (3/9). He was responsive and gave helpful information about the options available for air conditioner units and the process for getting one installed. He got us an installation appointment for the very next day.

The installers arrived at the promised time the next day and worked diligently for about 6.5 hours, into the early evening. They were positive, friendly, and patient about answering our questions. Their workmanship was high quality and they explained what would happen on day two of the installation. Before leaving they thoroughly cleaned the garage where they were working.

The second day of installation was today (3/13). An electrician (Linder Electric) and an Overlake service technician came out to finish the installation. We weren't here when they performed the work, but again the end results all looked clean, nice, and organized.

The Overlake scheduler and office staff are excellent about communicating updates. We appreciate the responsiveness, reliability, expertise, and professionalism of all of the Overlake staff and definitely recommend them.



"
Recommended by97%of homeowners
Avatar for COZY HEATING
COZY HEATING
4.8(
23
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Bothell, WA and surrounding areas

In business since 1979

Credit card accepted

"It turned out Cozy Heat is not a distributor of our furnace brand, however they did find out for us that it is still covered under warranty for parts, but not labor. We were quoted what the cost of labor would be for them to install. He attempted to contact the furnace brand people for more information and was transferred to a number that said they were not open at that time (imagine that - after 9:00 a.m. on a Monday morning). He asked his secretary to check into that and call us back. She did very promptly. We were told we might want to get a 2nd opinion to decide on an 11 year old furnace whether we want to have a new furnace installed or have just the heat exchanger replaced. At this time we are planning to meet with a different company for a 2nd opinion. But even while we are waiting to do that, we are leaning towards having Cozy Heat replace the whole furnace.
The indecision is that reading online customer reviews about the different furnace brands, I don't see a furnace that stands out with customers and quot;very satisfiedand quot; more than and quot;very unsatisfiedand quot;. Seems like the reviewed furnace brands people are consistently 45% very satisfied and 55% very unsatisfiedand quot;.
Not sure how this story will play out.
"
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Recommended by95%of homeowners
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Install Boiler FAQs, answered by experts

Yes, you can build a sunroom addition to your home despite living in a cold climate. Make sure to use high-quality insulation and windows and to supplement with sufficient heating from your HVAC system. The windows in the sunroom allow enough natural light into the room to help heat it most times without having to use the furnace. Even a small electric fireplace can heat the sunroom well enough.

If you go to turn it counterclockwise and it won’t turn anymore, it’s open. Like most other valves, you should be able to turn a radiator valve counterclockwise (to the left) to open it and clockwise (right) to close it. To close a radiator valve, turn it clockwise until you meet some resistance and can’t turn anymore, but do so carefully to avoid breaking the valve.

On average, you’ll need about two gallons of oil per day to heat your house when it’s 50 degrees Fahrenheit outside. Most oil tank capacity is about 275 gallons, and heating your house with two gallons of oil per day will last about four and a half months. This consumption will vary depending on the climate and average temperature in your location. For example, if the winters are longer and colder where you live, you’ll probably need to refill your oil tank at least once to get through the winter.

The absence of heating or hot water, unusual noises like banging or gurgling, and visible water leakage are key signs. Abnormal boiler pressure, flame irregularities (for gas boilers), or pilot light issues may also signal trouble. Frequent cycling, soot or staining, and unusual odors, particularly gas-like smells, should not be ignored. Modern boilers often display error codes or lockout mode upon detecting issues. Uneven heating across radiators and rising energy bills without increased usage can further point to problems. Prompt attention to these signs is essential to prevent further damage and ensure safety.

Boilers provide even heating, energy efficiency, and a quiet operation compared to forced air systems.

The Bothell, WA homeowners’ guide to boiler installation services

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