Furnace
Furnaces
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Evolution™ 98 Variable-Speed Modulating Gas Furnace987M
AFUE EFFICIENCY: Up to 98.3%
GAS VALVE TYPE: Modulating
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Evolution™ 96 Variable-Speed Gas Furnace
986T
AFUE EFFICIENCY: Up to 96.7%
GAS VALVE TYPE: Two-Stage
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Evolution™ 80 Variable-Speed Gas Furnace
880TA
AFUE EFFICIENCY: 80%
GAS VALVE TYPE: Two-Stage
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Evolution™ 80 Variable-Speed Ultra-Low Nox Gas Furnace
830CA
AFUE EFFICIENCY: 80%
GAS VALVE TYPE: Single-Stage
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Evolution™ 95 Ultra-Low Nox Gas Furnace
935CA
AFUE EFFICIENCY: Up to 95%
GAS VALVE TYPE: Single-Stage
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Preferred Series OVL Oil Furnace
OVL
AFUE RATING: Up to 87.5%
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Preferred Series OVM Oil Furnace
OVM
AFUE RATING: Up to 86.4%
Built on Trust. Powered by Expertise.
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Fast, Reliable Service 24/7From emergencies to routine calls, our team is always ready, day or night, to restore your comfort quickly.
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Financing & Membership PlansWe offer flexible financing and value-packed memberships to keep your home running smoothly all year.
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Licensed, Bonded & InsuredYour home is in safe hands with fully certified technicians and reliable, code-compliant service.
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Locally Owned & OperatedServing 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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"Very professional and very knowledgeable!"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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"They have earned my trust and loyalty!"I was impressed by their professionalism, politeness, and knowledge to my inquiries, with efficiency they evaluated any issues in detail and problem-solved with skill, which assures me the job would be done right the first time.- Barbara L.
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"I couldn't be happier with the experience!"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.
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"Excellent service from ONESTOP!"They serviced my AC and furnace and were professional, friendly, and clearly knew what they were doing. No pressure, just honest and reliable service. I’m really happy with how everything turned out and will definitely be using them in the future.- Matt H.
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"12/10 recommend them for all of your HVAC needs!"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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"Everything worked out really well!"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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"My house has never been more comfortable!"Adam was phenomenal. He was not pushy and provided me with all my options. He even explained everything to me in great detail. He really helped me make an educated decision. He educated me on SEER ratings and the different types of furnaces that exist.- Bob C.
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"I can't say enough good things about the technician that came and performed the work!"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.