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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"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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"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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"Completely satisfied with his knowledge and customer service!"He pointed out some conditions that function best with regular inspection and recommended their maintenance program.- Missy A.
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"They were on time, nice, kind, honest, did their job efficiently and well."Adam and his installers arrived the next morning, on time! The crew did a great job and were done sooner than I'd expected. They not only installed my new Trane furnace, but they also made the whole area look better and cleaner.- Carrie S.
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"They went the extra mile - no customer could ask for more!"
My new HVAC system works perfectly, and their teamwork was a pleasure to behold, even in hot July weather. The best communication and customer service anyone could hope for. They all really are five stars!
- Joy A. -
"Wonderful service from Onestop!"They serviced my furnace and AC, and they were on time and super friendly. I would highly recommend Onestop all my family and friends.- Joshua F.
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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.