ACI Northwest has served the Spokane area for decades, bringing the same crews and standards we’re known for across the Inland Northwest to homes throughout the city. Spokane has some of the region’s oldest and most characterful housing: early-1900s Craftsman bungalows, historic South Hill and Browne’s Addition homes, mid-century neighborhoods, and newer construction on the edges. Each era comes with its own heating and cooling challenges, and we know how to work on all of them.
We handle the whole home: heating, air conditioning, indoor air quality, water heaters, electrical, generators, and commercial systems.
Why Spokane Homeowners Choose ACI Northwest
Local since 1992. Three decades serving Kootenai County from a Coeur d’Alene base — not a franchise routing calls from out of the area.
Rated 4.8 stars across 500+ Google reviews. A track record built one Coeur d’Alene job at a time.
Factory-trained, NATE-certified technicians. As a Lennox Premier Dealer, Mitsubishi Electric Diamond Contractor, and dealer for Daikin and Trane, our crews are trained to size, install, and commission systems the way the manufacturer intended — so you get the efficiency and lifespan you paid for.
One team for the whole home. Heating, cooling, water heating, electrical, and generators under one roof means fewer contractors to coordinate and one number to call.
Honest recommendations. We’ll tell you when a repair makes more sense than a replacement — and back every job with a 100% satisfaction guarantee.
Our Services
Our Services in Spokane
Heating & Boilers. Spokane winters are long and cold, and a large share of the city’s older homes were built around boiler and hydronic heat: radiators, baseboard, and radiant systems that are still going strong when they’re properly maintained. We service, repair, and replace boiler heat systems, and we also handle heating repair, installation, and replacement, furnaces, heat pumps, air handlers, and ductless systems. Whether you want to keep a decades-old boiler running efficiently, convert to a modern system, or add heat to a finished attic or basement, we’ll walk you through the right path for an older home. Ask about high-efficiency options and financing.
Air Conditioning. Summers turn hot and dry, well into the 90s, and many older Spokane homes were never built for central air. Ductless mini-splits solve that beautifully, adding efficient cooling and heating without tearing into a historic home. We also install, replace, repair, and maintain central air and heat pump systems. Ductless is our go-to retrofit for homes without existing ductwork.
Indoor Air Quality. Late-summer wildfire smoke is a recurring reality, and older homes often have air-sealing and ventilation quirks that make filtration especially worthwhile. We install whole-home filtration, purifiers, humidifiers, and energy recovery ventilators.
Electrical & Generators. Panel upgrades and wiring, and whole-home standby generators, often paired with electrical updates in older homes.
Built for Spokane
Spokane is the Inland Northwest’s urban hub, and its housing stock is older and more varied than the surrounding suburbs: Craftsman bungalows, historic estates on the South Hill, brick homes in Browne’s Addition, mid-century neighborhoods, and newer builds farther out. Older homes bring boiler and radiator heat, tighter mechanical spaces, original ductwork (or none at all), and retrofit challenges that reward a contractor who’s actually worked on them. Layer in a demanding four-season climate (cold, snowy winters, hot dry summers, and a late-summer smoke season) and the right approach depends heavily on the age and construction of the specific home. That’s exactly the kind of work we do.
Spokane & Surrounding Service Areas
We serve communities across Eastern Washington and North Idaho, including Spokane Valley, Post Falls, Coeur d’Alene, and Hayden.
Spokane HVAC FAQs
Do you service and repair boilers?
Yes. Boiler and hydronic heat is common in Spokane’s older homes, and we service, repair, and replace these systems, including radiators, baseboard, and radiant floor heat.
My historic home doesn’t have central AC. What are my options?
Ductless mini-splits are ideal for older homes without ductwork, adding efficient cooling and heating without a major remodel.
Can you help update heating in an older home?
Yes. We handle retrofits and conversions in historic and mid-century homes, and we’ll recommend the approach that fits the house.
Do you help with wildfire smoke and indoor air quality?
Yes. Whole-home filtration and purification make a real difference during smoke season, especially in older homes.
