Top 5 Residential HVAC Contractors in Seattle 2026 (Ratings & Reviews)

Compare the top 5 residential HVAC contractors in Seattle for 2026 with ratings, reviews, services, and insights to help you choose the right provider.

Finding a reliable HVAC contractor in Seattle takes more than a Google search and a phone call. The region has dozens of options, review scores that don't always tell the full story, and homeowners who've learned the hard way that the lowest bid rarely stays that way.

This list compiles verified ratings and key facts across five of the most consistently recommended residential HVAC contractors serving Seattle and greater King and Snohomish counties in 2026, sourced from Google, Angi, the BBB, and independent reporting on top companies that provide AC installation in Seattle.

Highlights

• Product Air Heating, Cooling & Electric ranks #1 — 4.9-star aggregate rating across 760+ verified reviews, Mitsubishi Diamond Elite Certified, dual HVAC and electrical capability, serving King, Snohomish, Skagit, and Island counties.

• Evergreen State Heat & AC (est. 1968) holds a 4.9 Google rating with a 3-year parts and labor warranty, one of the longest in the Seattle market.

• BelRed Heating & Cooling leads in review volume (2,941 Google reviews, 4.8 stars); NATE Certified but now corporate-owned under Apex Service Partners.

• Brennan Heating & Air Conditioning is a Costco-affiliated Lennox installer, locally owned since 2003, with 1,834 Google reviews.

• Black Lion serves the Seattle Eastside with Mitsubishi certification and 0% financing options.

• All five contractors hold BBB A+ ratings and Washington State HVAC licenses.

#1 Product Air Heating, Cooling & Electric

Rating: 4.8 / 5 — 294 reviews (Angi) | 4.9 / 5 — 760+ Google reviews 

In business since: 2018 | Recognition: Angi Approved, Super Service Award Winner

Product Air is a family-owned HVAC and electrical contractor with offices in Marysville and Seattle. What separates them from most companies on this list is dual-trade capability: the same crew handles both HVAC and electrical work on a single job, eliminating the scheduling gaps and accountability problems that come with subcontracting electrical to a third party.

They hold Mitsubishi Diamond Elite Contractor status, the manufacturer's highest certification tier, held by fewer than 5% of contractors nationwide, which qualifies their customers for a 12-year manufacturer warranty rather than the standard 10. All permits are handled in-house, rebates are applied directly to the invoice before the customer signs, and service coverage spans King, Snohomish, Skagit, and Island counties.

For homeowners who need help outside normal business hours, Product Air heat pump emergency services in Seattle, WA covers urgent repair situations across the greater Seattle area.

Their pricing model stands out as well: full installation ranges by equipment tier are published publicly, and estimates are delivered with three to four written options so homeowners compare actual configurations rather than a single take-it-or-leave-it number.

Best for: Homeowners who want one contractor to handle HVAC and electrical on a single visit, or those prioritizing Mitsubishi systems with extended warranty coverage.

#2 Evergreen State Heat & AC (also Evergreen Eastside Heat & AC)

Rating: 4.9 / 5 — 419 Google reviews | BBB: A+ (1 complaint in 3 years)

Founded: 1968 | Locally owned since: 1998

Evergreen State is one of the oldest HVAC contractors still operating in the Seattle area. They operate under two entities (Evergreen State Heat & AC and Evergreen Eastside Heat & AC), covering King County and Snohomish County, with particular depth on the Eastside. They've been under consistent local ownership since 1998, which is a meaningful distinction in a market where several legacy contractors have been acquired by private equity.

They are authorized dealers for Trane and Mitsubishi, hold both construction and electrical licenses, and employ union-trained personnel. Their standout warranty term is a three-year parts and labor guarantee on all system replacements paired with an active maintenance program, one of the longer labor warranty commitments available in this market.

Google reviews consistently highlight responsive communication and technicians who take time to explain what was found and what was done.

Best for: Homeowners in King or Snohomish County who prioritize long-term warranty coverage and want a contractor with deep regional tenure and local ownership.

#3 BelRed Heating & Cooling

Rating: 4.8 / 5 — 2,941 Google reviews | BBB: A+ (6 complaints since 2021)

Founded: 1986 | Current ownership: Apex Service Partners (acquired 2022)

BelRed carries the highest Google review volume of any contractor on this list, nearly 3,000 reviews at a 4.8 average, which reflects nearly four decades in the market. They are NATE Certified, have received Home Advisor's "Best of" designation five consecutive years, and hold authorized dealer status for Rheem, Trane, and Mitsubishi.

New equipment installations carry a five-year warranty on heat exchangers and compressors, and their Gold Standard maintenance plan ($360 per year) is among the more comprehensive annual service programs in the Seattle market. The 2022 acquisition by Apex Service Partners, a private equity-backed HVAC roll-up, is worth noting for homeowners who prioritize local independent ownership. BelRed is now part of a larger national group, and some customers note that the service experience reflects that scale.

Best for: Homeowners who want a high-volume, broadly experienced contractor with multi-brand coverage and are comfortable with a corporate-owned service structure.

#4 Brennan Heating & Air Conditioning

Rating: 4.6 / 5 — 1,834 Google reviews | BBB: A+ (40 complaints in 3 years)

Founded: 1987 | Current ownership: Locally owned by Darrin Erdahl since 2003

Brennan has been in the Seattle market since 1987 and has operated under consistent local ownership since 2003, serving Seattle and Lynnwood with Lennox and Carrier equipment. They are one of the primary Costco-affiliated HVAC installation partners in the region, which standardizes both pricing and the one-year labor warranty required under Costco's program terms.

The review volume is substantial, and the 4.6 average is solid. The BBB complaint count, 40 in three years, is higher than others on this list, though the A+ rating is maintained. Homeowners researching Brennan should read recent reviews in detail rather than relying on the aggregate score alone, as complaint patterns can surface in the specifics that aggregate stars don't capture.

Best for: Homeowners pursuing Costco member discounts on Lennox equipment or those who value a long-tenured, locally-owned company with broad Seattle and Lynnwood service coverage.

#5 Black Lion Heating & Air Conditioning

Rating: Verified reviews across Google, Yelp, and HomeAdvisor

Certifications: Mitsubishi certified | Financing: 0% APR available

Black Lion serves greater Seattle with a particular concentration on the Eastside: Kirkland, Bellevue, and Redmond and has built a consistent reputation for structured, on-time installations with documented follow-up. They hold Mitsubishi certification, which qualifies them to install and register ductless and heat pump systems with manufacturer warranty backing.

Confirmed 0% financing is available, and reviews across platforms repeatedly note professional communication, clean project execution, and technicians who show up on schedule. For Eastside homeowners comparing options, Black Lion represents a focused, independently-operated alternative at a time when several regional competitors have moved under national ownership.

Best for: Eastside homeowners prioritizing Mitsubishi ductless systems, structured project management, and a contractor without a corporate rollup ownership structure.

Tips for Seattle Homeowners on How to Choose the Right Residential HVAC Provider

With multiple strong options in this market, the differentiator is rarely the brand of equipment. It's who installs it and what's covered after they leave. A few things worth verifying before signing:

Verify the license

Washington State requires a contractor license for residential HVAC work. The license number should be verifiable through the Washington State Department of Labor and Industries. Any contractor who can't provide one on request is a liability, not a contractor.

Understand what the warranty actually covers

Manufacturer warranties (10 or 12 years on parts) are separate from labor warranties. Ask specifically what the contractor's labor warranty covers, for how long, and what conditions void it. The difference between a one-year and a five-year labor term matters most at year three.

Ask how rebates are handled

Seattle homeowners have access to meaningful incentives from Seattle City Light, PSE, Snohomish PUD, and other programs. A contractor who calculates and applies rebates at the time of quote, reducing the number before you sign rather than leaving you to file separately, saves time and removes the risk of missing a program deadline.

Check that permits are included

Every Seattle HVAC installation requires at least two permits. If a quote excludes permit costs, or if the contractor suggests skipping them to save money, treat that as a disqualifying signal. Unpermitted work voids manufacturer warranties and creates disclosure obligations when the home sells.

Look beyond the star rating

Aggregate scores don't replace reading recent reviews. A high rating alongside a high BBB complaint volume can indicate a gap between the sales process and the service experience, a pattern worth identifying before committing to a job that may take two days and cost $15,000 or more.

Seattle's HVAC market has become meaningfully more transparent over the past few years. Contractors who publish pricing, certifications, and warranty terms openly tend to deliver more consistent outcomes. Homeowners who compare on those factors, not just the bottom line of the quote, consistently report better experiences on the other side of the installation.