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

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.

Find out more

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.

Find out more

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.

Find out more

Our Customers Say

“The A/C is AMAZING! It’s 30 degrees cooler inside on low fan.”

Grant, Troy Creek, MT

“Our Congregation has saved over $11,000 heating our church since Formula Fabrication installed Mitsubishi Ductless Heat Pumps in January 2011.” (As of 2012)

Ron, St John's Lutheran Church, Libby, MT

“Anyone thinking fire wood is cheaper has never used a Mitsubishi Ductless Heat Pump.”

Wade, Libby, MT

Formula Fabrication
31936 US Highway 2, Libby, Montana
[email protected]
Office Hours:
Monday - Friday, 8:00am to 5:30pm
Most Saturdays, 8:00am to 2:00pm