Mini split or ducted heat pump: which fits your house?

How do ductless and central ducted systems differ?

Both use the same heat pump cycle. The difference is how heat reaches the rooms. In a ductless mini split system, each indoor unit sits in the room it serves, and one outdoor unit supplies heating and cooling and has its own controls, so rooms can run at different temperatures. A ducted system uses one air handler, often in the basement or a closet, with supply and return ducts feeding every room from a single thermostat.

Because the mini split needs only a small hole for refrigerant lines, installation is quicker and less disruptive. A ducted installation can reuse a furnace’s ductwork, which saves work but only if the ducts are in good condition.

When does a ductless mini split make sense?

• No existing ductwork. Homes heated by baseboards, radiators or in-floor loops would need new ducts for a ducted system, a costly and intrusive job.
• Additions and problem rooms. A sunroom, converted garage or cold bedroom can get its own head without touching the rest of the house.
• Different temperature preferences. Separate zones let people set their own rooms and heat only the spaces in use.
• Leaky or undersized ducts. A ductless system skips the ducts and avoids the heat losses that leaky ductwork causes.

For layout and capacity questions, see sizing a mini split and choosing zones, and for the basics read ductless heat pumps explained.

When does a central ducted system make sense?

A ducted system fits when sound ducts already serve the house, such as a forced-air home replacing a furnace and air conditioner. It spreads heat evenly, hides the equipment, supports whole-house filtration and humidity control, and leaves walls free of indoor units. Many people also prefer one thermostat and no heads on the walls. Our guide to using a ducted heat pump with existing ducts explains what to check first.

Ducts must be sized for the airflow a heat pump needs, which can differ from a furnace, and they should be sealed and insulated where they pass through cold spaces. If you are not sure about your ducts, ask the installer to test them as part of the quote.

How do comfort, noise, cost and appearance compare?

Comfort differs in the way heat arrives. Mini splits give warm air from a high wall and can feel direct close by, while ducted air is spread through many vents and can feel more even. Ductless indoor units are quiet but visible, and the cooling system works in summer as well. Ducted systems hide the equipment but can carry fan noise and duct sound if poorly designed.

On price, there is no universal winner. A single-zone mini split can cost less than a ducted system, but heating a large house with many heads can match or exceed it, and costs vary by region and house. The drivers are laid out in the heat pump cost guide, and installing in older homes covers retrofits where duct work is the main variable.

Can you combine both, and what about winter?

Yes. A common pattern is a ducted unit for the main floors and a mini split for an addition or a basement suite. Both types are available in cold climate versions, and the sizing and backup questions are the same: see cold climate heat pumps and dual-fuel systems if you keep a furnace for the coldest days.

At Drake Landing, homes carried heat through a small air handler and ducts fed by a low-temperature district loop (see the air handler page). The takeaway is that distribution matters as much as the heat source: well-planned ducts or well-placed heads decide how comfortable the house feels.

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