Heating & Cooling in Columbia Falls
Your neighbors. Your shop. Upfront pricing. Honest as a Montana handshake.
Western Sky Heating & Cooling is based at 3580 MT-40 in Columbia Falls. This is home base for Flathead residential service and replacement — furnaces, boilers and hydronic heat, heat pumps, indoor air quality, and ductwork built in our own shop.
If you knew this location as Denning Sheet Metal, you’re in the right place under new ownership. A lot of Flathead folks already know the Denning name — and that service needed a reset in recent years. That’s the job in front of us: honest scheduling, prices in writing, work done right. Call 406-296-3336 or use the form. More on the shop story is on About.
Services from this hub
Furnace repair · Furnace installation · AC repair/install · Heat pumps · Boiler / hydronic · Indoor air quality · Custom ductwork. Hydronic system-type detail lives on hydronic heating. Diagnostic fees and membership pricing stay on their own pages when those figures are unlocked. Plumbing and tankless are not promoted on this hub.
Every job starts the same way. We show up, diagnose the problem, and walk you through your options with published pricing. You decide what happens next.
Built for Flathead Valley conditions
Columbia Falls homes run their heating systems from October through April. First freeze usually hits by mid-October, and canyon winds can make it feel much colder, especially in older homes near the downtown core or along the highway corridor.
Natural gas is the primary heating source here, supplied by NorthWestern Energy. Flathead Electric Cooperative handles the electric side. Homes in Glacier Hills, the Meadow Lake area, and Cedar Creek each have their own heating profiles depending on age, insulation, and exposure. Our team sizes and recommends systems for your specific home, not a national average.
Summers are getting warmer, too. July and August highs regularly reach the upper 80s and low 90s, and more Flathead Valley homeowners are adding air conditioning for the first time. If you're considering AC or replacing an older system, we'll help you choose the right fit.
Nearby towns (nested under Columbia Falls)
Hungry Horse, Whitefish, Columbia Heights, Evergreen, Kalispell — each nested under /columbia-falls/{town}. No flat-root town URLs.
Western Sky is a participating contractor in Comfort Ready Home, a program of the Bonneville Power Administration and Northwest utilities. Ask us what your utility offers before you replace a system.
What you can count on
Frequently asked questions
Straight answers for Flathead homeowners — phones, service area, and what we do (and don’t) advertise.
What phone number should I save for Western Sky in Columbia Falls / the Flathead?
406-296-3336 — that’s our published Columbia Falls / Flathead residential number. Call that number or use the form on this site.
Do you serve Columbia Falls, Whitefish, and Kalispell?
Yes. We’re based at our Columbia Falls shop on Highway 40 and schedule the corridor — Columbia Falls, Whitefish, and Kalispell — as capacity allows. Hungry Horse may be available as an optional nested corridor stop; confirm your address when you call 406-296-3336 or send the form.
Is there a different number for Bozeman?
Yes. Bozeman and the Gallatin Valley publish their own number on Bozeman pages. Don’t use the Columbia Falls number as the Bozeman NAP, or vice versa. This page is Flathead residential service — save 406-296-3336.
What about the old Denning number 892-0111?
Legacy 406-892-0111 may still forward into our Columbia Falls line, but it is not a number to save or publish. Save 406-296-3336.
Are you the old Denning Sheet Metal?
Same Columbia Falls shop on Highway 40 (3580 MT-40), new ownership as Western Sky Heating & Cooling (formerly Denning Sheet Metal). A lot of Flathead folks already know the Denning name — and that recent years of service needed a reset. That’s what we’re here for. Call 406-296-3336 or use the form.
Did you merge Denning’s Google reviews into Western Sky?
No. We keep the verified Western Sky listing and mark Denning permanently closed — not merged. Heritage carries through honest naming and citations, not by importing old ratings.
What’s the shop address and website?
3580 MT Hwy 40 W / 3580 MT-40, Columbia Falls, MT 59912 · westernskyhvac.com · Call 406-296-3336.
What heating and cooling work do you do from this hub?
Residential service and replacement from Columbia Falls: furnaces, air conditioning, cold-climate heat pumps, boiler and hydronic heat, indoor air quality, and ductwork built in our own shop. We’re a Lennox dealer for Columbia Falls residential. Call 406-296-3336 or use the form to schedule.
Do you offer maintenance memberships?
Yes — seasonal tune-ups and member preferences as defined on the plan page. Exact monthly pricing publishes when our price book is locked; until then, call 406-296-3336 or use the form and we’ll explain today’s options honestly.
Does Western Sky do plumbing or install water heaters?
Yes. We install and service water heaters. General plumbing is a different conversation — if you’re not sure whether a job is water-heater work we do or something that needs a licensed plumber, call 406-296-3336 and we’ll tell you straight.
Why aren’t the Whitefish and Kalispell URLs at the root?
Our site nests corridor towns under the Columbia Falls engine — for example /columbia-falls/whitefish/... and /columbia-falls/kalispell/.... That’s intentional architecture, not a mistake.
How do I book service?
Call 406-296-3336 or use the form on this page. We’ll get you on the schedule and explain next steps.
Custom metal, made in-house
Sheet metal fabrication and shop work out of the Columbia Falls location.
Ready to schedule?
Call the Western Sky Heating and Cooling team or send us a message.