The Ductless Advantage

A ductless heat pump is an easy-to-use, energy efficient heating and cooling system equipped with the most advanced technology available in the industry.
With a state of the art INVERTER driven compressor, ultimate comfort can be delivered to any room at the touch of a button.


Offering the Best


  • 12 Years on Mistubishi Compressor
  • 12 Years on Mitsubishi Parts
  • 1 Year Formula Fabrication Full Service Warranty

Coleman Heating & Cooling

Coleman engery-efficient heating and air conditioning systems are rugged and reliable, helping you to beat the high cost of energy while providing you with long lasting comfort you can count on for years to come.

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Trane Heating & Cooling

Take control of your home's indoor temperature with TRANE's energy efficient, air conditioners, heat pumps and furnaces. Get the best air possible for your home with America's Most Trustedâ„¢ HVAC Systems.

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Rinnai & Empire Propane Heaters

Rinnai and Empire direct vent, low-profile heaters provide a perfect solution that delivers warmth and comfort for your whole home or supplemental heating needs.

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Kuma Wood Stoves & Fireplace Inserts

Kuma stoves are EPA certified and proudly made 100% in the USA. Satisfaction guaranteed at prices you won't believe.

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Our Customers Say

“The Kumo Cloud is working great; I travel all the time & now I can conveniently monitor my homes temp from anywhere.”

Pete, Libby, MT

Our Mitsubishi heat pump work’s just like it did when Formula Fabrication installed it, haven’t even had to touch it.

Bill, Libby, MT

We just turned our ductless unit on this week and it cooled the house right down to comfortable!

Thalia, Libby, MT

Formula Fabrication
31936 US Highway 2, Libby, Montana
Office Hours:
Monday - Friday, 8:00am to 5:00pm