Central AC vs ductless mini split: which is right for your home?

There's no single best way to cool a house. There's the right way for your house, your heating system, and the rooms that actually overheat. The two options we install most are central AC and ductless mini splits. Here's how they really compare.

Central air conditioning

Central AC adds a cooling coil to your existing furnace and an outdoor condenser beside the house. Cool air moves through the same ducts and vents your heating already uses. If your home has a forced-air furnace, this is usually the cleanest path to cooling every room at once.

The strengths: the whole house is served from one system, nothing new appears on your walls, and it's typically the most cost-effective whole-home option when ducting already exists. The catch: it depends on that ducting. If your ducts are undersized or leaky, the system underperforms until they're fixed.

Ductless mini splits

A ductless system skips the ducts entirely. A slim indoor head mounts on the wall of the room it serves, connected to an outdoor unit by a small refrigerant line through the wall. One head cools one zone. A multi-zone system runs several heads off a single outdoor unit.

The strengths: no ductwork needed, very quiet, extremely efficient, and each zone has its own control, so the upstairs bedrooms can run cold at night while the main floor rests. The catch: heads are visible on the wall, and cooling a whole large home room by room can cost more than one central system.

Which house suits which?

• Forced-air furnace with decent ducts? Central AC is usually the winner.
• Baseboard or hot-water heat with no ducts at all? Ductless, no contest. This is most of Vancouver's character housing stock.
• Whole house is fine except one or two hot rooms? A single ductless head in the problem room beats cooling the entire house.
• Condo or townhouse? Almost always ductless, subject to strata approval on the outdoor unit.
• Adding a suite or an addition? A dedicated ductless zone gives the new space its own comfort and control.

The hybrid answer nobody mentions

Plenty of Surrey homes end up with both: central AC for the main floors and a ductless head in the bonus room over the garage that the ducts never reached properly. Or central cooling downstairs and a ductless zone upstairs where the heat actually collects. The right design follows the heat, not the catalogue.