Central AC vs Heat Pump vs Mini-Split: 2025 Cost Comparison

TL;DR: Central AC alone runs $4,500-$8,500 installed and only cools. A heat pump costs $6,000-$14,000 but heats and cools, often cutting winter energy bills 30-50% versus electric resistance or oil heat, per Department of Energy estimates. Ductless mini-splits run $3,000-$5,000 per zone and win when you're heating or cooling only part of a house, like an addition or a converted garage.

_Last reviewed: July 2026 · 8 min read_

Your furnace or AC just died, or it's limping toward its 15th year, and now three contractors are pitching three different systems at three very different prices. The math isn't hard once you separate upfront cost from what you'll actually pay to run the thing for the next decade.

Okoniq Property Hub keeps a maintenance log for whichever system you choose, so warranty dates, filter changes, and service calls don't disappear into a drawer full of receipts.

What does central AC cost to install and run?

A new central air conditioner runs $4,500 to $8,500 installed for a typical 1,800-2,500 square foot home, depending on tonnage and SEER rating. That price assumes existing ductwork is in decent shape. If ducts need sealing or replacing, add $1,500 to $4,000.

Central AC only cools. You still need a separate furnace, boiler, or baseboard system for heat, which means two pieces of equipment to maintain, two sets of filters, and two failure points. Annual maintenance for AC alone runs $100-$200 for a tune-up, and a poorly draining unit can cause real damage fast, so check the AC condensate drain line every spring before the humidity hits.

Running costs land around $400-$600 a year for cooling in most of the continental US, more in the Sun Belt where units run six to eight months straight.

What does a heat pump cost, and how is it different?

A heat pump costs $6,000 to $14,000 installed, and it does both jobs, heating and cooling from one outdoor unit. Modern cold-climate heat pumps stay efficient down to 5°F and below, which has ended the old myth that heat pumps only work in mild climates.

The efficiency gain shows up in the electric bill. The DOE estimates heat pumps can cut heating energy use 30-50% compared to electric resistance heat or oil furnaces, since they move heat rather than generate it. Compare that against a home still running old baseboard heaters, where every watt of electricity converts to heat at a 1-to-1 ratio versus a heat pump's 2.5-to-3.5-to-1 ratio.

Heat pumps also qualify for federal tax credits up to $2,000 under the current Inflation Reduction Act rules, and many states add rebates on top, sometimes $500-$3,000 more depending on income and utility.

What does a ductless mini-split cost, and when does it make sense?

A single-zone mini-split costs $3,000 to $5,000 installed, and multi-zone systems run $1,500-$2,500 per additional indoor head. No ductwork is required, which is the entire appeal.

Mini-splits make the most sense in three situations: a home with no existing ducts, an addition or converted space (garage, sunroom, basement) that the main system doesn't reach well, or a multi-unit rental where you want to bill tenants separately for their own zone's energy use. Landlords running duplexes often install one mini-split per unit specifically to end disputes over shared thermostat costs.

| | Central AC + Furnace | Heat Pump | Mini-Split | |---|---|---|---| | Upfront cost | $4,500-$8,500 (cooling only) | $6,000-$14,000 | $3,000-$5,000/zone | | Heats and cools | No (two systems needed) | Yes | Yes | | Ductwork required | Yes | Usually yes | No | | Best for | Whole-house, existing ducts | Whole-house, new construction or duct replacement | Additions, no-duct homes, multi-unit rentals |

Which system wins on total cost over 15 years?

The heat pump usually wins on 15-year total cost if your current heat source is electric resistance, propane, or oil, because the energy savings compound every winter. Run the math on a home spending $2,000 a year on oil heat: a 40% cut saves $800 a year, or $12,000 over 15 years, which more than closes the gap against a $6,000 furnace-and-AC combo.

Central AC plus a gas furnace stays competitive where natural gas is cheap, since gas furnaces are already efficient and gas prices per BTU often beat electricity. If your ducts are solid and gas is under $1.20 per therm in your area, replacing like-for-like is often the lower-cost path.

Before committing to any option, check your attic. Poor insulation or unbalanced attic ventilation can waste 20-30% of whatever your HVAC system produces, and an attic insulation upgrade sometimes pays back faster and cheaper than upgrading the equipment itself.

What about long-term maintenance costs for each system?

Mini-splits and heat pumps need filter cleaning every one to three months, more often than a standard furnace filter change, since dust builds up on the indoor head's coil. Budget $150-$300 a year for professional service on any of the three systems, and expect a compressor or outdoor unit to last 12-18 years with regular upkeep.

FAQ

Is a heat pump worth it if I already have a working furnace?

Usually not immediately. Replacing a functioning furnace early rarely pays back fast enough to justify it, but when the furnace is near end of life (15+ years) a heat pump is worth pricing against a like-for-like replacement.

Do mini-splits work in cold climates like Minnesota or Maine?

Yes, cold-climate mini-splits rated for -13°F to -15°F are common now and many owners in the Northeast use them as primary heat with a backup source for the coldest nights.

How much electricity does a heat pump add to my bill?

It depends on your climate and home size, but a typical 2,000 square foot home might see winter electric bills rise $80-$150 a month while whatever fuel bill it replaced (oil, propane) drops to near zero.

Can I mix systems, like a heat pump for most of the house and a mini-split for one room?

Yes, this is common in additions and finished basements where extending ductwork isn't practical, and it avoids oversizing the main system to cover a small extra space.

What SEER rating should I look for in 2025?

Federal minimums now require 14-15 SEER depending on region; look for 16-18 SEER for a meaningful efficiency jump without paying for high-end 20+ SEER units unless energy costs in your area are especially high.

This is educational information, not financial or engineering advice. Get quotes from at least two licensed HVAC contractors and confirm current tax credit and rebate eligibility with a tax professional before you buy.