HVAC Installation in Havre, MT
A new system here will heat from September through June and cool from July through August every year. Tell us about the house, and a licensed contractor who covers Hill County will get in touch.
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A new system here has ten months of heat and two of cooling to get through
Winter nights in Hill County average 8°F from December through February. Whatever you install has to bring a cold house up to temperature on those nights, over and over, from September through June. That is ten months of heat a year, and only two months, July and August, when the system runs the other way and cools instead.
Most homes here heat with gas, and a furnace sized wrong for those 8°F nights will run long and hard trying to keep up. On the cooling side, summer afternoons average a mild 80°F, so the air conditioner isn't fighting extreme heat, but it still needs to be matched to the house to run efficiently on the days it's needed. Hill County has also seen 17 winter storms and 98 damaging wind events over the past ten years, and power can go out with them. A new system should be installed with that in mind.
- 10 months
- September through June, your system heats
- 2 months
- July through August, it cools
- 8°F
- the average winter night it heats against
- 80°F
- the average summer afternoon it cools against

NOAA nClimDiv, 1991–2020 normals
Montana requires HVAC contractors to hold a state license.
The license is tied to the contractor, not the job. It covers this installation the same as any other work that contractor does. Montana carves out an exception for small jobs. Work under $2,500 does not require a licensed contractor. A full heating and cooling system installation runs well past that line, so the contractor doing it needs to hold that state license.
A license does not replace a permit. Most cities and counties in Montana require a permit from the local building office to replace a furnace, air conditioner or heat pump, along with an inspection once the work is finished. That inspection is what checks the installation itself, the gas connections, the wiring, the refrigerant lines, after the contractor's license already tells you who was allowed to do the work.
Source: Montana Legislature
- When should I replace my HVAC system?
- Start looking at replacement once your furnace or air conditioner needs a repair that costs a large share of what a new one would, or when it can no longer keep the house comfortable. Age matters more here than in mild climates, since your furnace runs from September through June and takes a beating over that stretch. If it struggles to keep up on the cold nights this place gets, that is a sign of wear, not just a bad night. A contractor can tell you whether a repair still makes sense or whether the unit has reached the point where replacement is the better move.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, yes, it usually makes sense to do them together. A furnace and air conditioner installed at the same time are matched to work as one system, and pairing an old unit with a new one can mean the new one never runs at its rated efficiency. That said, your air conditioner here only runs through July and August, so if it is newer and working fine, there is no reason to replace it just because the furnace needs to go. A contractor can look at the age and condition of both and tell you what fits your situation.
- What happens during an HVAC installation?
- A contractor removes the old furnace and air conditioner, sets the new equipment in place, and connects it to your ducts, gas line or electrical circuit, and refrigerant lines. They check the ductwork for leaks or sizing problems, since a new system moving air through bad ducts will not perform the way it should. Once everything is connected, they test the system, set the controls, and make sure it is running correctly before leaving. This work needs a permit from the local building office and an inspection once it is done, and a licensed contractor handles that as part of the job.

