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Seattle Boiler & Radiant Heating Specialists

We provide expert boiler installation, radiant floor heating, and air-to-water heat pump systems tailored for Seattle homes. Our hydronic solutions deliver lasting comfort, energy efficiency, and reliable performance in the city’s damp climate.


Precision Heating for Seattle's Diverse Architecture

Seattle’s housing stock is a rich tapestry of styles, each with its own character and heating challenges. A one-size-fits-all approach doesn’t work here. We bring a specialist’s eye to every project, whether it’s a classic Craftsman in Ballard or a sleek, contemporary home in Madison Park. Our deep knowledge of hydronic systems allows us to design solutions that respect your home’s design while delivering superior comfort and efficiency.

Historic Home Retrofits

Modern radiant systems for older homes without compromising character.

New Custom Construction

High-performance boilers and heat pumps integrated into new builds.

Seattle Climate Solutions

Systems designed to eliminate cold spots and damp winter chill.

Code & Electrification

Expertise in energy codes and electrification for full compliance.

Your Seattle Source for Luxury Hydronic Heating

We provide a focused suite of services dedicated to the art and science of hydronic heating. Our expertise ensures your system is installed correctly, serviced meticulously, and performs flawlessly for years to come.

Radiant Heating Installation & Service

For homes in Magnolia or West Seattle, a radiant heating system offers the ultimate in comfort. We not only install these luxurious systems but also provide expert service. Using advanced tools like thermal imaging cameras, we can diagnose “dead spots” in existing floors and fine-tune system performance to ensure every room is perfectly and evenly heated.

Boiler Installation & Annual Service

A high-efficiency boiler is the heart of a powerful hydronic system. We install industry-leading brands and, unlike many generalists, provide critical annual servicing. This includes a full combustion analysis and heat exchanger cleaning-essential maintenance in Seattle’s damp climate to prevent corrosion, maximize efficiency, and extend the life of your investment.

Air-to-Water Heat Pump Systems

As Seattle moves toward a greener future, air-to-water heat pumps represent the pinnacle of efficient, electric-powered home heating. Ideal for new construction and major renovations, these systems provide both heating and hot water. We specialize in the design and installation of these advanced systems from brands like Stiebel Eltron, SpacePak, and Viessmann.

The Specialist Seattle Builders and Homeowners Trust

Choosing a specialist means choosing uncompromising quality. With a background as a manufacturer’s representative and industry instructor, our founder brings unmatched expertise to every project. We don’t just install equipment—we engineer complete hydronic heating solutions built for performance and longevity.

Hydronic Expertise

Exclusive focus on boilers, radiant heat, and air-to-water heat pumps.

Code Compliance

Experienced in Seattle permitting and energy codes.

Precision Tools

Advanced analyzers and thermal cameras for accurate diagnostics.

Ongoing Care

Annual service plans that protect efficiency and extend system life.

Hear From Our Valued Clients

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Kevin Hamilton profile picture
Kevin Hamilton
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Outstanding experience from quote to completion. David installed all the equipment for our radiant floor heat and hot water in our garage. From thoroughly explaining his quote, to an absolutely beautiful install (who knew mechanical could be a work of art) we were very pleased with the result. Highly recommend.
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Matthew Frank profile picture
Matthew Frank
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100% recommend I had David out to do a check-up on our Navient tankless water heater and it was a great experience. He was friendly, professional, and super informative. He not only serviced it, but he also explained what he was looking for, why, and what each result meant. When you're looking for someone to work on water system in your house, this is the kind of service you want.
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Nicholas Noren profile picture
Nicholas Noren
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Solid experience all around working with North Sound Boilers & Radiant. We purchased a home 18 month ago and have had boiler issues off and on. I had another highly reputable heating company out twice to try and sort out the issues but they weren’t able to get to the root of the problem. I contacted North Sound on a Sunday evening during one of our cold spells this winter because our boulder went down and my family and I didn’t have heat. David came over that evening. Amazing service! He got us back up and running and after some trial and error David was able to pin point my problem and come up with a solution. All along communicating very well and being a honest guy. I would absolutely recommend giving them a call for your heating needs.
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George Saul profile picture
George Saul
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Our 12-year old Triangle Tube boiler died recently and we contacted David at North Sound. Within 7 days he sent us an estimate and came to our Whidbey Island home to do the work. The work took about 7 hours on day1 and 5 hours on day2. He used an IBC boiler and pretty much replaced ~90% of the old boiler stem (pumps, tanks, lines, etc.) Dave seems to have the competence you would need with such a relatively complex system. Definitely not amateur hour with your gas/propane line, ignition and high temperatures and your water line all converging into this system. Potential for a down wind disaster. I did not shop around as we had used David for prior maintenance and his reviews are excellent. It definitely is not inexpensive - more than my used car cost. David came prepared with all the tools and parts he needed. No breaks. On time, cleaned as he goes. We will definitely use him again if needed. See pics.
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Jim Davis profile picture
Jim Davis
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Our boiler stopped working meaning we had no heat or hot water. David came out the next day and diagnosed the problem. Ours is an old boiler and the part was not available locally. He ordered the part through expedited overnight delivery and installed it Saturday morning. I recommend North Sound Boilers without hesitation. David is a skilled technician but more importantly a man of integrity.
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Dave Rucker profile picture
Dave Rucker
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Very good.
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Elizabeth McCullough profile picture
Elizabeth McCullough
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Prompt, great service and communication with David.
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Stephen Wescott profile picture
Stephen Wescott
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We highly recommend NorthSound Boilers and Radiant. David is knowledgeable, practical and personable. He was able to solve our heating/hot water problem quickly, for a very reasonable price. Thank you again for great service.

Your Project, From Lake Union to Puget Sound

We’ve refined our process to be as clean and efficient as the systems we install. From the initial plan review to the final walkthrough, we manage every detail to ensure a professional and transparent experience for our Seattle clients.

Step 1: Initial Consultation & Analysis

For new builds in Broadmoor or Windermere, we begin by reviewing architectural plans. For service calls in Wallingford, we start with an on-site diagnostic to precisely identify the issue.

Step 2: System Design & Planning

We create a detailed system design tailored to your home’s specific needs, ensuring it meets or exceeds Seattle’s rigorous energy codes. We handle all necessary documentation for SDCI permit applications.

Step 3: Meticulous Installation

Our team executes the installation with precision and care, using premium components from industry-leading brands. We coordinate with local Seattle suppliers to ensure timely access to the best equipment.

Step 4: Final Commissioning & Walkthrough

Once the installation is complete, we commission the system, performing a final combustion analysis on boilers and balancing radiant loops. We then provide a thorough walkthrough, ensuring you are comfortable operating your new luxury heating system.

Results You Can See and Feel

Our commitment to quality is evident in every project we complete. We believe in showing, not just telling.

Proudly Serving Neighborhoods Across Seattle

Our team is on the road daily, serving homeowners and builders throughout the city. We are intimately familiar with the unique homes and construction requirements in communities all across Seattle.

Queen Anne | Capitol Hill | Magnolia | Laurelhurst | Madison Park | West | Seattle & Alki | Windermere | Broadmoor | Ballard | Fremont | Wallingford | Green Lake | Ravenna | View Ridge

Get a Quote for Your Seattle Heating Project

Ready to experience the superior comfort and efficiency of a professionally designed hydronic heating system? As Seattle’s premier boiler and radiant heat specialists, we are here to bring our expertise to your project. Contact us today to discuss your new construction or service needs.