In December 2025, we completed the final stage of certification required by Mitsubishi Electric to move into the Elite Diamond category.
This is the very category that, according to NETR Inc, is held by fewer than 5% of Mitsubishi contractors in the United States, approximately 150 companies out of 3,000 Diamond Contractors nationwide. In Washington State, only a small number of companies hold this designation.
This article is not about how great we are. This article is about what Elite Diamond means in practical terms, how we reached it over eight years of work, and why this status directly impacts the home of every one of our clients in Western Washington. If you are choosing a contractor for a heat pump or AC installation and want to understand what to look for, this is for you.
How We Achieved the Elite Diamond Status in Eight Years. No Shortcuts
Product Air was founded in 2018, and today our team includes dozens of licensed technicians, offices in Marysville, Issaquah, and Seattle (the Seattle office opened in April 2026), our own warehouses stocked in advance with equipment, and more than 5,000 residential clients in our portfolio.
Mitsubishi certification has three levels. The lowest is Standard, granted to contractors who have installed several systems and completed basic training. Diamond is the next level, earned over years of work, continued education, and consistent installation quality. Elite Diamond is the highest tier, and Mitsubishi awards it only to companies that, year after year, demonstrate installation volume, quality, and operational discipline.
We received Diamond status several years ago. Since then, each year we worked toward the performance indicators required for Elite, increasing the number of registered systems, maintaining strict response-time requirements, completing advanced service coursework for every technician, undergoing additional training specifically for cold-climate heat pump systems (Hyper-Heat / H2i), and having Mitsubishi monitor our customer satisfaction through its reporting systems. This does not happen in a single season. In our case, it was a six-year path: from our first Mitsubishi installation in 2019 to Elite Diamond status at the end of 2025.
In 2025 alone, we completed more than 150 Mitsubishi system installations across Western Washington. From traditional air-source heat pump systems in Marysville to full ducted Hyper-Heat retrofits in Bellevue and Mercer Island, from ductless mini-split configurations in Shoreline to multi-zone MXZ systems in Kirkland. This is the level of volume that Mitsubishi sees, and it is part of why we moved into the Elite category.
What Elite Diamond Means in Practice for a Homeowner
When I explain our new status to clients, I usually begin with what it does not mean. It does not mean we suddenly became better than we were yesterday. The team is the same, the technicians are the same, and our approach to work is the same. Mitsubishi did not gift us this status. We earned it through years of accumulated performance. What changed is that we now have access to several specific advantages that were previously unavailable or available at a lower level.
First, a 12-year parts and compressor warranty. This is exclusive to Diamond-tier installations. If your neighbor installs the same Mitsubishi heat pump through a Standard-level contractor, their warranty is the manufacturer’s standard 10 years. Our clients receive 12 years, during which Mitsubishi will replace the compressor if it fails for reasons unrelated to misuse. On a system costing $18,000–$22,000, those additional two years represent real value.
Second, priority allocation of equipment and replacement parts. This is critical in a market where HVAC supply chains remain unstable. Last year, there was a nationwide shortage of compressors for cold-climate systems in the United States. Mitsubishi allocated available inventory first to Elite contractors. That means if your system requires a replacement component, we will receive it faster than if you were working with a lower-tier contractor.
Third, direct access to Mitsubishi engineers. If an installation presents non-standard conditions, for example, a 1958 home with a unique ductwork configuration that does not fit typical layouts, our service manager contacts Mitsubishi engineering directly, not through general support channels. This reduces resolution time from days to hours.
Fourth, continuous performance monitoring by the manufacturer. Mitsubishi tracks our Net Promoter Score (NPS), our response time to customer inquiries (the requirement is 15 minutes), the results of annual audits, and the quality of installation registrations. If we fail to maintain standards, we can be downgraded. This is a working agreement that requires us to maintain performance every day.
When you see an HVAC company advertise “Mitsubishi Diamond Contractor,” you now have the framework to ask which level: Standard, Diamond, or Elite Diamond. The difference between them is real.
Why Mitsubishi, But Not Only Mitsubishi
Several times per week, I am asked why we focus so heavily on Mitsubishi and whether we are simply trying to sell the most expensive option. I answer directly.
Mitsubishi is our top choice for two reasons. The first is Hyper-Heat (H2i) technology. Most standard heat pumps lose efficiency below freezing and switch to auxiliary heating that consumes significantly more electricity. Mitsubishi systems maintain full heating performance down to -13°F. In Seattle’s climate, where winter temperatures rarely fall below 20°F, this provides a reserve margin that is rarely needed, but during the three to five nights per year when temperatures reach 18°F or lower, that difference becomes noticeable on electric bills.
The second reason is the ecosystem. We work through Gensco, the largest HVAC distributor in Washington State and Mitsubishi’s authorized distributor on the West Coast. This relationship means parts are available on our shelves today, not in two weeks. Engineering support is local, understands our climate, and operates in our time zone.
But we do not install only Mitsubishi systems. Approximately 60% of our installations are Mitsubishi, and the remaining 40% are distributed among several brands, each strong in its own niche. Trane is our primary recommendation when a client wants a classic single-stage or multi-stage system, a well-established American brand founded in 1885, with strong warranties and a broad service network. In our pricing structure, we offer three Trane lines: RunTru for entry-level projects, Resolute Quest for mid-range installations, and Priority multi-stage for AC systems. Coleman is a strong alternative in the mid-range category, particularly for furnace replacements in older Seattle homes, offering reliable gas furnaces with solid heat output and a 10-year factory warranty covering key components. Midea is relatively new to the U.S. market but occupies an important place in our pricing structure; its EVOX G3 inverter-driven heat pump system offers one of the best price-to-efficiency ratios available. For clients who want inverter technology but are not ready to pay Mitsubishi premium pricing, it is an ideal option, with a 10-year compressor warranty and U.S.-level support.
When you request an estimate from Product Air, our technician does not automatically recommend Mitsubishi. First, we listen to your priorities such as budget, expected system lifespan, winter performance expectations, noise considerations, and long-term plans for the home, and then prepare three to four estimate options across different brands. Often, clients choose Mitsubishi because we explain clearly what they are paying for. But no one is pressured into it.
What We Actually Do in Western Washington
In 2025, the Product Air team completed projects in 34 communities across Western Washington: from Marysville in the north and Stanwood on the coast to Mercer Island and Bellevue on the Eastside, from Shoreline and Edmonds in north Seattle to Issaquah and Sammamish in the eastern hills. Each location has its own characteristics.
In Seattle proper, much of the housing stock dates from the 1920s to the 1950s, access is narrow, SDCI permit requirements are strict, and electrical upgrades are common. Installing a heat pump in a Wallingford craftsman bungalow often requires upgrading the electrical panel from 100 amps to 200 amps, because the existing panel cannot support a new compressor along with an EV charger and induction range installed at the same time.
In Eastside cities such as Bellevue, Kirkland, Sammamish, Redmond, Mercer Island, homes built between the 1990s and 2020s often range from 2,800 to 4,500 square feet, with complex ductwork that frequently requires zoning systems. Mitsubishi MXZ multi-zone configurations are common in this geography, and many of our premium installations occur there.
In Snohomish County, Marysville, Mukilteo, Stanwood, Mountlake Terrace, Lake Stevens, the housing stock is mixed, from 1970s split-level homes to new construction. Marysville is our home base; we know the local permit offices and inspectors, and many clients come to us by referral.
One example from real work: last winter, a client in Shoreline was preparing to sell a 1972 home with a 60% efficiency gas furnace and a 100-amp electrical panel serving a single heating zone. The client’s goal was to install a heat pump before listing the home, because an Energy Smart audit from Energize Shoreline can add 5–7% to a home’s value when it includes a modern HVAC system. We conducted the estimate on Tuesday, approved a Mitsubishi Hyper-Heat configuration with two zones on Wednesday, filed mechanical and electrical permits on Thursday, began work on Monday, and completed installation on Wednesday. Permits were signed, documentation added to the home’s file, and the property was listed the following week with verified Energy Star certification. The home sold $35,000 above asking price, supported by strong marketing around energy efficiency. This is what structured execution looks like.
What Is Included in Our Work: Items You Will Not Always See in Other Estimates
Every Product Air installation includes several elements that contractors often either price separately or omit entirely. Permits and inspections are included in the price. In Seattle, a heat pump installation requires two to three permits from SDCI: mechanical, refrigeration, and electrical, each costing between $149 and $500. Lower-tier contractors sometimes add permit fees later as a surprise line item, or do not file permits at all, leaving homeowners exposed during resale, insurance claims, or rebate processing. In our estimates, permits are always included, always filed by us, and clients do not need to get involved and stress did they fill it out correctly.
All rebates are applied directly in the estimate. Western Washington has more than a dozen rebate programs: Seattle City Light, PSE, Snohomish PUD, Energy Smart Eastside, Energize Shoreline, and PSE’s program for the city of Duvall (up to $8,000 for residents in ZIP codes 98014 and 98019), among others. During the estimate, our technician identifies applicable programs for your address and deducts the rebate amount immediately. Our back office then handles documentation and submission.
Our installation warranty is 10 years, unconditional. Many HVAC companies advertise “10-year warranty,” but require annual paid maintenance contracts to keep it valid; miss one service visit and the warranty is void. Our 10-year labor warranty is unconditional. No mandatory service contracts, no fine print. If something goes wrong due to our installation within 10 years, we correct it at no charge. This labor warranty is separate from the manufacturer’s warranty, which covers equipment for 10 or 12 years depending on the brand.
Our emergency response time is four hours. If your Product Air installation fails on a winter Sunday evening, our technician will be at your home within four hours. This is an operational standard supported by our dispatch system and on-call rotation.
2025 Numbers
- 150+ Mitsubishi installations in Western Washington
- 34 communities served
- 5,000+ residential clients in our portfolio
- 8 years in operation since founding in 2018
- 3 offices: Marysville, Issaquah, Seattle
- Elite Diamond status achieved December 2025
- 12-year parts and compressor warranty on Mitsubishi installations
- 4-hour guaranteed emergency response
- 10-year unconditional labor warranty
What Elite Diamond Means for the Market
In Western Washington today, hundreds of HVAC companies operate at different scales: from individual licensed technicians to corporate networks such as Beacon, Hunt’s, and BelRed. Among them, Mitsubishi certifies approximately 30–40 contractors in King and Snohomish counties. Of those, roughly 12–15 hold Diamond-level certification. We are one of 3–4 who hold Elite Diamond. This is a framework that should help a homeowner make a more informed decision when choosing a contractor.
When you receive three estimates for a heat pump installation from different companies, the price difference can reach $5,000–$8,000. Part of that difference is justified: premium-tier equipment, higher-quality components, longer warranties. Part of it is not. It may simply reflect marketing or inefficient operational structure. Elite Diamond status is one objective parameter by which you can compare estimates. If the lowest-priced company is a Standard-level Mitsubishi contractor or not Mitsubishi-certified at all, you understand that savings are coming from something specific: most likely warranty coverage, tooling and training, or proper permit handling.
We are publishing this article not to convince you to choose Product Air. We are publishing it so that you know which questions to ask any HVAC contractor you contact: What level of Mitsubishi certification do you hold? What exactly is the warranty on parts, on labor, and is there fine print? Are permits included in the estimate, or will they appear as a separate line item later? Are rebates applied directly in the estimate, or will the homeowner receive them afterward? What is your expected emergency response time?
If a contractor answers these questions confidently and specifically, that is a good contractor. If the answers drift into generalities, it is worth taking a second look.
Serge Nikolin Co-Founder Product Air Heating, Cooling and Electric Marysville · Issaquah · Seattle · Western Washington
Tel: (425) 344-3738