ComfortCostGuide

State cost guide

Idaho: HVAC Replacement Cost Calculator

Replacing an HVAC system in Idaho typically runs $3,500 to $7,000 for a gas furnace alone, $4,000 to $7,500 for central air conditioning, and $7,500 to $13,000 when both are swapped out at the same time. Heat pumps fall between $6,000 and $12,000 installed, while a ductless mini split ranges from $3,500 to $10,000 depending on how many zones you need. Idaho's labor index sits at 0.93, about 7% below the national baseline, with HVAC technicians earning an average of $28.85 per hour.

Worked example

Take a 1,900-square-foot two-story home in Idaho with an original gas furnace and an air conditioner both pushing 20 years old. Because the ductwork and electrical are already in place and the homeowner is replacing both units in one visit, this job lands near the middle of the $7,500 to $13,000 combined range, around $10,000 for a mid-efficiency furnace and matched AC condenser. Choosing a higher-efficiency variable-speed pairing, or adding duct repairs and a new line set, pushes the same project toward the $13,000 end.

Frequently asked questions

How much does it cost to replace a furnace in Idaho?

A gas furnace replacement in Idaho generally costs $3,500 to $7,000 installed. The low end covers a straightforward swap of a single-stage unit in an accessible basement or utility closet, while the high end reflects higher-efficiency two-stage or modulating furnaces, larger heating capacity, or venting changes.

Is a heat pump a good choice for Idaho's climate?

Idaho sits in climate zone 5, so winters are cold enough that a heat pump usually needs backup heat or a dual-fuel setup with a gas furnace to stay comfortable on the coldest days. Heat pump installs run $6,000 to $12,000 in Idaho, and pairing one with an existing furnace is a common way to control that cost.

Why is HVAC installation cheaper in Idaho than the national average?

Idaho's labor index is 0.93, meaning installation labor runs roughly 7% below the national baseline, with technicians averaging $28.85 an hour. Equipment prices are set nationally, so the savings show up mostly in the labor portion of a bid rather than in the cost of the furnace or condenser itself.

Should I replace my AC and furnace at the same time?

If both units are near the end of their life, doing them together at $7,500 to $13,000 is usually cheaper than two separate jobs, since the crew shares one trip, one set of permits, and one round of setup. It also guarantees the blower and coil are properly matched, which protects the efficiency rating you paid for.

What does a ductless mini split cost in Idaho?

Ductless mini splits in Idaho run $3,500 to $10,000. A single-zone system heating and cooling one room or an addition sits near the bottom of that range, while a multi-zone system with three or four indoor heads serving most of a house approaches the top.

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