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.

CONTACT US

(208) 772-9571

Call Us Anytime or Request a Callback Below

Our Current Promotions

Free Second Opinions!

BEFORE YOU MAKE A BIG HVAC DECISION, CALL THE RED VAN YOU CAN TRUST.

Been told you need a major repair or a new system? Get a free second opinion from ACI Northwest before you make the investment.

We’ll take another look, explain what we find, and help you understand your options. Sometimes the right answer is replacement. Sometimes it’s a repair. Our job is to help you know the difference.

Free. No obligation. No pressure.
Just another set of experienced eyes.

No Expiration!

ACI IS CELEBRATING AMERICA’S 250TH!

Get a $250 ACI credit toward any qualifying invoice of $1,500 or more.

For 250 years, America has been built on hard work, trust, and community. We’re proud to celebrate by giving our customers a little something back.

The Red Van You Can Trust 1776 • 2026

Call ACI Northwest today to learn more.

No Expiration! Restrictions and exclusions may apply, must be presented before price given.

Comfort Now. Payments That Fit Your Budget.

FINANCING OPTIONS FROM 12 TO 120 MONTHS

From 12 Months Same as Cash to up to 120-month financing options, ACI Northwest can help make your new heating, cooling, or electrical project easier on your budget.

From 12 Months Same as Cash to up to 120-month financing options, ACI Northwest can help make your new heating, cooling, or electrical project easier on your budget.

Choose the payment option that works for you:

  • 12 Months Same as Cash
  • Flexible financing terms up to 120 months
  • Ultra-low monthly payment options
  • Get the comfort, efficiency, and reliability you need without putting off the project.

The Red Van You Can Trust

Quality work. Flexible options. ACI Northwest.

No Expiration! Subject to approved credit. Financing terms and promotional offers may vary.

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.

(208) 772-9571

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.

Ready to Explore Lennox Systems?

Whether you’re ready to buy or just starting to research, our team is happy to walk you through your options, answer questions, and provide a no-pressure quote.

ACI Northwest — Lennox Premier Dealer serving Coeur d’Alene, ID, Spokane, WA, and surrounding communities.