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Service & Repair
When your heating or cooling system is not doing its job, start with a practical assessment of the problem and your options.
RESIDENTIAL HVAC
From troubleshooting to a full system plan, JSI Mechanical helps Sanders County homeowners make the next right move.

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When your heating or cooling system is not doing its job, start with a practical assessment of the problem and your options.
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When replacement is the right move, choose a system with the needs of your home and Montana seasons in mind.
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Ductless mini splits give targeted heating and cooling where traditional ductwork is not the best fit.
Mini split options →04

Build your home’s comfort system into the plan, with residential HVAC installation for new construction.
New construction HVAC →FREE ESTIMATES