
Mitsubishi
Mitsubishi
Comfort in Every Climate, Mitsubishi Makes It Possible.
Mitsubishi HVAC systems offer cutting-edge solutions for your heating, cooling, and electric needs. With a focus on energy efficiency, Mitsubishi products ensure optimal comfort and savings. Their innovative HVAC solutions, designed for both residential and commercial spaces, embody reliability and performance, making Mitsubishi a trusted choice for all.


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City Multi® Modular Systems for Every BuildingChoose from air- and water-source heat pumps or simultaneous heat/cool systems, featuring a variety of indoor units. Along with ventilation solutions, multiple control options round out a complete system to meet your building’s needs. Models available from 6 tons to 36 tons.
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M-Series Personalized Comfort for Any HomeMini- and multi-split systems are perfect for room remodels or whole-home projects. Models are available from 9,000 to 60,000 BTU/H.
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Controls Put Comfort in Your HandsOur advanced controls, smart home integrations and innovative technologies make Mitsubishi Electric the clear choice for upgrading your residential project’s HVAC.
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Smart Multi Long-Term PerformanceMulti-zone VRF systems perfect for light commercial or residential applications. Models available from 3 tons to 5 tons.

Built on Trust. Powered by Expertise.
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From emergencies to routine calls, our team is always ready, day or night, to restore your comfort quickly.
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We offer flexible financing and value-packed memberships to keep your home running smoothly all year.
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Your home is in safe hands with fully certified technicians and reliable, code-compliant service.
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Serving Snohomish and King County with trusted, community-focused HVAC and electrical expertise.

Hear From Our Happy Customers
At ONESTOP, your satisfaction is our priority! See for yourself what our customers have to say about working with us.
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OneStop is a top-notch company! They installed our new heat pump in no time, and we couldn't have been more pleased with the quality and professionalism. Very polite, professional, and proficient!- Amanda O.
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I recently hired Onestop for a furnace repair, and I couldn't be happier with the service they provided. From the moment I contacted them to the completion of the repair, Onestop demonstrated professionalism and expertise that exceeded my expectations.- Ashley N.
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They went above and beyond our expectations, and I not only look forward to working with them in the future, but I feel confident and safe knowing they genuinely have our best interests in mind when doing their job. You can tell they strive for excellence- Craig M.
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I used them for maintenance on my furnace and AC. They explained things well, were polite & professional. It was scheduled quickly and the price was good.- Jon E.
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The team at OneStop really cares about their work and doing a great job for their clients. Highly recommend!- Lauriana L.
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He pointed out some conditions that function best with regular inspection and recommended their maintenance program.- Missy A.
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I have to say thank you to Adam for coming out and getting us all fixed up and running again. He is very professional and very knowledgeable, and got the job done quickly. I will definitely be using him from here on out. Great guy for sure!!- Tony N.
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The techs arrived on time, were courteous and respectful of my home, and quickly diagnosed and fixed the issue with my HVAC system. They took the time to explain the problem to me in a way that I could understand and offered solutions to prevent issues.- Travis R.