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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"10 out of 10!"This company fixed a refrigerant leak that was left by a larger company in the area. They did it at a reasonable rate, they were friendly, knowledgeable, and perform the work in a timely manner. 10 out of 10 recommend.- Michael B.
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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.
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"They're my top choice for any heating and cooling needs!"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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"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 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. -
"Highly recommended, five stars!"It was amazing to watch OneStop Heating's team in action. Heat pumps are not small investments so it makes all the difference to know you've got a quality installation and the company will back its work with a sound maintenance program.- Ann M.
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"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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"The job was extremely well done!"Adam and Gram came in today to install a new furnace. The job was extremely well done and completed in half a day. I couldn't be happier with their service and the quality of materials they used.- Chris M.