ACI Northwest has served Post Falls since 1992, working out of our office just up the road on Government Way. Post Falls has changed enormously in that time, growing from a river town into one of the fastest-growing cities in Idaho, and we’ve kept pace, handling everything from brand-new subdivisions to the established homes along the Spokane River. Whatever your home needs, you’re calling a local team, not a franchise dispatched from out of the area.
We cover the whole home: heating, air conditioning, indoor air quality, water heaters, electrical, generators, and commercial systems. We handle installation, replacement, repair, and maintenance.
Why Post Falls Homeowners Choose ACI Northwest
Local since 1992, with three decades serving Kootenai County. Rated 4.8 stars across 500+ Google reviews. Our NATE-certified, factory-trained technicians are a Lennox Premier Dealer, Mitsubishi Electric Diamond Contractor, and dealer for Daikin and Trane, so systems get sized and installed to deliver the efficiency you paid for. One team for the whole home, honest repair-or-replace advice, and a 100% satisfaction guarantee.
Our Services
Our Services in Post Falls
Heating. Post Falls winters run long and cold, with stretches below freezing and steady snow, so your heating system does real work for months at a time. We handle furnace repair, installation, and replacement, plus heat pumps, boilers, air handlers, and ductless systems. Many established homes near the river and older downtown rely on boiler and hydronic heat (radiators, baseboard, or radiant floor), and our technicians service, repair, and replace those systems too, whether you’re keeping an older unit efficient or planning an upgrade. Building or replacing? Ask about high-efficiency furnace and heat pump options.
Air Conditioning. Summers here turn hot and dry, regularly into the upper 80s and 90s. We install, replace, repair, and maintain central air, ductless mini-splits, and heat pump systems, sized to keep the whole house even. Plan ahead rather than wait for a heat-wave breakdown.
Indoor Air Quality. Late-summer wildfire smoke is a recurring reality across the region. We install whole-home air filtration, air purifiers, humidifiers, dehumidifiers, energy recovery ventilators, and UV systems to keep indoor air clean when the outdoor air isn’t.
Electrical & Generators. From panel upgrades and wiring to whole-home standby generators, our licensed electricians keep your home safe and powered through winter storms.
Built for Post Falls
Post Falls sits on the Spokane River at the western edge of Kootenai County, right up against the Washington state line, and its growth has created two very different kinds of HVAC work. On one side, the new subdivisions going up across town call for new-construction systems and high-efficiency upgrades done right the first time. On the other, the established homes near the historic downtown and the river often run aging equipment that’s overdue for replacement. We work across both, matching the system to the age of the home and the way it’s built. On top of that, the four-season climate puts real demand on heating and cooling here: cold, snowy winters, hot dry summers, and a late-summer smoke season that makes filtration matter.
Post Falls & Surrounding Service Areas
We’re based nearby and serve communities across Kootenai County and into Eastern Washington, including Coeur d’Alene, Dalton Gardens, Rathdrum, Hayden, and Spokane Valley.
Post Falls HVAC FAQs
Do you offer emergency HVAC service in Post Falls?
Yes. When your heat or AC fails, call us and we’ll get a technician out as quickly as possible.
We’re building a new home in Post Falls. Can you handle new-construction HVAC?
Yes. We size and install complete new-construction systems, including high-efficiency and zoned setups, and we’ll make sure it’s done right the first time.
How much does a new furnace or AC cost?
It depends on your home’s size, the system, and your ductwork. We provide free, no-pressure quotes, plus promotions and financing.
How often should I service my system?
A heating tune-up in the fall and a cooling tune-up in the spring is the cheapest way to avoid a breakdown in demanding weather.
