Which one costs less to install?
It depends entirely on whether you already have ductwork. If your house has good ducts, central air is almost always cheaper, often $5,500 to $12,500 installed, because the contractor just sets a condenser, a coil, and a line set. A single-zone mini split runs about $3,500 to $6,000, but a whole-house multi-zone system with four or five heads climbs to $12,000 to $14,500, which can beat central air once you factor in the equipment per room.
The math flips when there are no ducts. Adding ductwork to an older home can add $3,000 to $10,000 on top of the central AC equipment, and it eats closet and ceiling space. In that situation a ductless mini split is both cheaper and far less invasive. Run the load first with our BTU calculator so you are not paying for an oversized system either way.
Which keeps the house more comfortable?
Mini splits win on even comfort because each indoor head is its own zone with its own temperature. The bedroom can sit at 68 while the living room holds 72, and you are not paying to cool empty rooms. Central air runs the whole zone off one thermostat, so the room farthest from the air handler is usually the one that is too hot in summer and too cold in winter.
Central air has one comfort edge: better whole-house filtration and dehumidification through a single return and a real filter cabinet. Mini split heads use small washable filters and do less for dust and humidity across the whole home. If allergies or muggy summers are your main complaint, that is a point for central. If hot and cold rooms are the problem, the mini split fixes it.
Which is more efficient and does it heat too?
Mini splits are more efficient on paper and they also heat, which is the bigger deal. Premium ductless units hit 30+ SEER2 cooling, while most central AC sits at 14 to 18 SEER2, partly because central systems lose 20 to 30 percent of their conditioned air to duct leakage in attics and crawlspaces. A ductless head delivers air straight into the room with no duct losses.
The real separator is heating. A mini split is a heat pump, so it cools in summer and heats in winter from the same box, often replacing a furnace. Central AC only cools; you still need a furnace or a separate heat pump for winter. For how heat-pump heating stacks up against gas, read heat pump vs furnace.
Mini split (ductless) wins on
- +No ductwork needed, ideal for older homes, additions, and garages
- +Room-by-room temperature control with no hot or cold rooms
- +Heats and cools from one system, can replace a furnace
Central air wins on
- +Cheaper to install when good ductwork already exists
- +Hidden, with only vents showing instead of wall-mounted heads
- +Stronger whole-house filtration and dehumidification
The verdict
Pick central air if your house already has solid ductwork and you want the lowest install cost and hidden equipment. Pick a ductless mini split if you have no ducts, a problem room, an addition, or you want efficient heating and cooling in one system. For most no-duct or uneven-temperature homes, the mini split is the smarter buy in 2026.
Related: Best mini split systems, BTU calculator: size it right, Heat pump vs furnace.
Frequently asked questions
Is a mini split cheaper than central air?
Not always. A single-zone mini split (about $3,500 to $6,000) is cheaper than central air, but a whole-house multi-zone system can reach $12,000 to $14,500, which is similar to central. Central air is the cheaper choice when good ductwork already exists; the mini split wins when ducts have to be added.
Can a mini split cool an entire house?
Yes, with a multi-zone outdoor unit feeding several indoor heads, usually one per main room or open area. One head will not condition a whole house with closed doors, so plan a head for each space you want controlled. Size it with a load calculation, not by square footage alone.
Do mini splits heat as well as cool?
Yes. A mini split is a heat pump, so it both heats and cools from the same outdoor unit, and modern cold-climate models keep heating well below freezing. Central air only cools, so it still needs a furnace or separate heat pump for winter.
Is there a federal tax credit for a mini split or central air in 2026?
No. The federal 25C Energy Efficient Home Improvement Credit expired for systems placed in service after December 31, 2025. In 2026, look to state rebate programs and your utility's incentives instead; check your current state and utility incentives before you buy.
Which lasts longer, a mini split or central air?
A well-maintained mini split typically lasts 15 to 20 years, while central AC condensers usually last 12 to 17 years. Both depend heavily on filter changes, correct sizing, and an annual cleaning of the outdoor coil.