ACI Northwest is proud to be a Lennox Premier Dealer — one of the highest designations a heating and cooling contractor can earn from Lennox. Whether you’re replacing an aging furnace, upgrading to a high-efficiency air conditioner, or exploring a heat pump for year-round comfort, our team is trained and ready to help you find the right Lennox system for your home or business.
Why Lennox?
For more than 130 years, Lennox has built a reputation as one of the most innovative and reliable names in home comfort. Their systems are engineered for performance, efficiency, and longevity — qualities that matter especially here in North Idaho, where winters are demanding and summers can surprise you.
Industry-Leading Efficiency
Lennox air conditioners and heat pumps reach up to 28 SEER, and their top-tier gas furnaces deliver up to 98.7% AFUE efficiency — meaning nearly every dollar you spend on fuel goes directly toward heating your home.
Quiet, Precise Operation
Lennox’s variable-speed technology modulates capacity continuously rather than cycling on and off, maintaining consistent temperatures throughout your home and running quieter than conventional systems.
Smart Home Ready
Lennox systems pair seamlessly with the iComfort® S40 smart thermostat, giving you remote control, AI-driven scheduling, and real-time system diagnostics from your phone.
Strong Warranty Coverage
Dave Lennox Signature® Collection products come with 10-year coverage on components and compressor, and 20-year coverage on the heat exchanger — some of the most comprehensive warranties in the industry.
Our Current Promotions
Lennox Product Lines We Carry
Dave Lennox Signature® Collection
The flagship line. Top-of-the-line efficiency, quietest operation, and the most advanced features available. Ideal for homeowners who want the best long-term investment in comfort and energy savings.
Elite® Series
A strong mid-range option that balances performance with value. Reliable, efficient, and built to handle the seasonal demands of the Inland Northwest.
Merit® Series
An affordable entry point into the Lennox family. Dependable performance with the quality and build standards Lennox is known for, at a more accessible price.
What We Install & Service
- Gas furnaces
- Central air conditioners
- Heat pumps (single fuel and dual fuel)
- Ductless mini-split systems
- Air handlers
- Indoor air quality accessories (air purifiers, humidifiers, dehumidifiers)
- iComfort® smart thermostats
What It Means to Be a Lennox Premier Dealer
Not every HVAC contractor earns the Lennox Premier Dealer designation. To achieve and maintain Premier status, dealers must complete Lennox’s factory training program — a rigorous curriculum covering system design, installation best practices, service, and customer communication. Premier Dealers are also held to ongoing customer satisfaction standards, which means our commitment to quality isn’t just something we say — it’s something Lennox holds us accountable for.
When you choose ACI Northwest, you’re not just getting a Lennox system. You’re getting a team that knows how to properly size, install, and commission it so you get the performance and efficiency ratings the system was designed to deliver. Ask about our maintenance plans to protect your investment year after year.
Serving Coeur d’Alene, North Idaho & Eastern Washington
ACI Northwest has been serving homes and businesses in the Coeur d’Alene area since 1992. Our service area covers communities throughout Kootenai County and Eastern Washington, including Spokane. We understand the climate here — the cold snaps, the wildfire smoke seasons, the humid summers — and we use that knowledge to recommend systems that perform year after year in real Inland Northwest conditions.
Current Lennox Offers
ACI Northwest regularly offers Lennox rebates and financing options on qualifying equipment. Check our current promotions page — including rebates up to $1,800 on select models and financing options up to 60 months with no interest on qualifying systems.
Offers subject to change. Contact us for current availability.
