Top 5 Best Radiant Heating Companies in Seattle

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Radiant heating repair in Seattle, Washington

Top 5 Radiant Heating Companies in Seattle (Updated 2025)

Meta Description: Searching for the best radiant heating services in Seattle? Compare the top-rated companies for quality, pricing, and reliability—including Janes Radiant Heating.

Seattle homeowners seeking energy-efficient warmth often turn to in-floor radiant heat systems. This guide compares the top 5 Seattle-area radiant heating companies (updated 2025) by service focus, coverage, specialties, and customer ratings. We highlight Janes Radiant Heating as the #1 specialist (solely focused on radiant systems) and compare four other contractors (CPI, NW Mechanical, Gene Johnson, and SeaTown Electric) on their offerings.

1. Janes Radiant Heating (All of Western Washington)

Janes Radiant Heating is a family-owned Seattle-area firm (35+ years) that focuses exclusively on radiant heat systems (hydronic floor heating and geothermal). They handle custom design, installation, repair, and even DIY installation support. Janes proudly advertises itself as “Washington’s #1 installer of hydronic radiant floor heating systems.” One homeowner said, “Our experience with Janes … has been the best! They really know their product.”

Specialties: Radiant floor and geothermal systems, DIY kits
Areas Served: Greater Puget Sound
Rating: ~4.8/5 (Google)

2. CPI Plumbing & Heating

CPI is a full-service plumbing/HVAC contractor offering radiant floor heating across NW Washington. Known for fast response and reliable service.

Focus: Hydronic radiant floor heating
Areas: Skagit, Island, Whatcom, North Snohomish
Rating: ~3.5/5

3. NW Mechanical, Inc.

Seattle-based HVAC specialists since 1977. Offers radiant floor heating, geothermal, boilers, and water heater installations with a reputation for experience and reliability.

Focus: Hydronic in-floor systems
Areas: Seattle, Shoreline, Eastside
Rating: ~4.6/5

4. Gene Johnson Plumbing & Heating

Offers a wide range of home services including radiant heating. Long-standing Seattle business with strong customer reviews.

Focus: Electric/hydronic radiant heating
Areas: Seattle metro
Rating: ~3.9/5

5. SeaTown Electric, Plumbing, Heating & Air

Highly-rated Puget Sound contractor. While radiant heating isn’t a core offering, they handle general heating systems with excellent customer service ratings.

Focus: General heating (non-specialized)
Areas: King, Snohomish, Skagit, Whatcom
Rating: ~4.8/5

Comparison Table

Company Radiant Focus Service Area Specialties Rating
Janes Radiant Heating Radiant Repair, Hydronic/geothermal + DIY Seattle Metro Design, install, repair, DIY kits ~4.8
CPI Plumbing Hydronic radiant NW WA Plumbing, HVAC ~3.5
NW Mechanical In-floor hydronic Seattle & Eastside Boilers, geothermal ~4.6
Gene Johnson Electric/hydronic Seattle HVAC, plumbing, electrical ~3.9
SeaTown General heating Puget Sound Electrical, HVAC, plumbing ~4.8

Ready for Radiant Comfort?

Call Janes Radiant Heating at 1‑800‑974‑5884 or visit our website to schedule a consultation. Let our experts design a custom radiant heating system that fits your home and budget.

How do I choose the best radiant heating company in Seattle? +
Look for companies that specialize in radiant systems, have strong customer reviews, and offer clear estimates. Janes Radiant Heating, for example, focuses exclusively on radiant solutions and offers both custom installs and DIY support.
What should I ask when comparing radiant heating contractors? +
Ask about their experience with in-floor systems, whether they install hydronic or electric radiant heating, what brands they service, and if they provide maintenance. Also request details on warranty, timeline, and ongoing support.
Are all radiant heating companies in Seattle the same? +
Not at all. Some, like Janes Radiant Heating, focus solely on radiant systems. Others—such as SeaTown or CPI—offer radiant as part of a wider HVAC or plumbing service. It’s important to compare based on specialization, service area, and expertise.
What’s the difference between hydronic and electric radiant heating? +
Hydronic radiant systems use heated water in PEX tubing beneath floors, while electric systems use coils or mats. Hydronic is more energy-efficient long-term and ideal for whole-home heating. Electric is better for small areas or retrofits.
Why is Janes Radiant Heating ranked #1? +
Janes is one of the only Seattle-area companies that exclusively installs, repairs, and maintains radiant systems. With 25+ years of experience and a focus on energy-efficient hydronic designs, they’re trusted by homeowners across the region.

Ready to Get Started with the Seattle Radiant Heating Experts?

Janes Radiant Heating stands apart as Seattle’s most trusted and specialized radiant heating company. Whether you need a custom installation, expert repair, or DIY radiant floor kit, our dedicated team is ready to help.

Request a Free Estimate Call 1‑800‑974‑5884