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Residential Heating & Air Conditioning

A.T. Klemens Residential department offers top quality equipment with design and installation by trained professionals. Complete coordination of your job from start to finish results in a clean, neat installation in the shortest possible time.


• Free consultations and estimates

• Same day installation available

• Forced-air systems

• Hot water / Steam systems

• Radiant floor heat systems

• Humidifiers and Electronic air cleaners

• Garage, Space, and Wall heaters

• Central Vacuum Systems

• Financing available

• Service and repair

• Authorized Carrier and Mitsubishi dealer

Commercial Heating, Ventilating and Air Conditioning

A.T. Klemens' commercial HVAC department is currently providing services in several Northwest states. Our crews are available for any type of job, large or small at competitive rates.

• Plan and spec or design build

• New construction and retrofits

• Warm air systems

• Steam and hot water systems

• Commercial / industrial ventilation


• Authorized Carrier and Mitsubishi dealer

814 12th Street North
Great Falls, Montana

406.452.9541