ComfortCostGuide

State cost guide

Connecticut: HVAC Replacement Cost Calculator

Replacing an HVAC system in Connecticut typically runs $7,500 to $13,000 installed for a matched central AC and gas furnace, while a standalone heat pump lands between $6,000 and $12,000. Costs here sit above the national middle because Connecticut's HVAC labor index is 1.14, with installers earning an average of $35.38 an hour. Connecticut falls in climate zone 5, so equipment has to handle both real winter heating loads and humid summers, which pushes homeowners toward larger, better-matched systems.

Worked example

Take a 2,100-square-foot colonial in central Connecticut with existing ductwork, a 20-year-old gas furnace, and an outdoor AC unit that finally quit. Replacing both at once as a matched system is the common path, and with two pieces of equipment, a full day or more of crew time at Connecticut's labor rates, and a zone 5 heating load that calls for a properly sized furnace, this job would land in the upper half of the $7,500 to $13,000 range — roughly $10,500 to $12,000. Swapping only the AC condenser and coil and leaving the furnace in place would instead fall in the $4,000 to $7,500 band, though mismatched equipment ages ​less gracefully.

Frequently asked questions

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

A gas furnace replacement in Connecticut runs $3,500 to $7,000 installed. Simple like-for-like swaps in an accessible basement sit near the low end, while high-efficiency models, new venting, or tight crawlspace work push toward $7,000.

Are heat pumps a realistic option in Connecticut's climate?

Connecticut is in climate zone 5, which means genuinely cold winters, so heat pumps here need to be cold-climate rated and correctly sized for the heating load rather than just the cooling load. Installed costs run $6,000 to $12,000, and many Connecticut homeowners keep an existing gas furnace as backup heat rather than going all-electric in one step.

Why is HVAC installation more expensive in Connecticut than in other states?

Connecticut's labor index is 1.14, meaning installation labor costs about 14% more than the national baseline, with HVAC technicians averaging $35.38 per hour. Since labor is a large share of any replacement, that difference shows up across every system type, from a $3,500 mini split to a $13,000 AC-and-furnace pairing.

What does a ductless mini split cost in Connecticut?

Ductless mini splits in Connecticut range from $3,500 to $10,000 installed. A single indoor head serving one room or an addition sits at the bottom of that range, while a multi-zone system covering several rooms in a home without ductwork approaches $10,000.

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