HVAC Installation in Idaho Falls, ID
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A new system here has to handle ten months of heat, most of it cold
Winter nights in Bonneville County average 15°F from December through February, and homes need the furnace running from September through June. That is ten months of the year the heating system carries the load, with only a short stretch where it can rest. Summer afternoons average 77°F, mild enough that cooling is a light job by comparison, but a new system still has to handle both.
56% of homes here heat with gas, so a furnace swap is the common job. Whatever gets installed has to be sized for nights well below freezing, not just the mild afternoons. Bonneville County has recorded 157 winter storms and 118 damaging wind events over the past ten years, and in Idaho, 11% of households went at least 24 hours without power in 2024. A furnace that comes back on by itself once power returns matters here.
- 10 months
- September through June, your system heats
- 15°F
- the average winter night it heats against
- 77°F
- the average summer afternoon it cools against
Idaho requires HVAC contractors to hold a state license.
The license is issued to the contractor, not to the job, so the same license that qualifies someone to install a furnace in one house covers the next one. It comes from the state's HVAC Board, which tests and keeps a record of who holds it. That is what stands behind the person working on your system in Bonneville County.
For an installation, the license is what makes the contractor accountable for the work. Alongside it, replacing a furnace, air conditioner or heat pump usually needs a permit from the local building office, with an inspection once the job is done. That inspection is a separate check on the installation itself, apart from who holds the license to do it.
Sources: Idaho Legislature · Idaho Division of Occupational and Professional Licenses
- When should I replace my HVAC system?
- Replace it when repairs start happening every year, or when the repair bill starts to catch up with what a new system costs. An old furnace working through a winter that averages 15°F doesn't leave much room for a breakdown. If your system is limping through each heating season and you're calling for service more than once a year, that's your answer. A contractor can look at the age and condition of your furnace and tell you whether it's worth repairing again or time to replace it.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, it usually makes sense to do them together. A furnace and air conditioner installed years apart often don't match well, and a mismatched system can run less efficiently than two units built to work as a pair. That said, homes here don't need cooling at all, so the air conditioner sees far less use than the furnace does over the year. A contractor can look at the age and condition of both and tell you whether replacing just the furnace makes more sense for your house.
- What happens during an HVAC installation?
- A contractor removes the old equipment, sets the new furnace and outdoor unit, and connects them to the existing ductwork, gas line, and electrical circuit. They check the ducts for leaks or damage since the new equipment depends on them to move air through the house. Once everything is connected, they test the system, check the airflow, and make sure it's firing or cooling the way it should before they leave. In most places here, this work needs a permit from the local building office, and the job gets inspected once it's done.