A ductless mini split system consists of two main components: an outdoor compressor/condenser unit and one or more indoor air-handling units. These components are connected by a conduit that houses the refrigerant tubing, power cable, suction tubing, and a condensate drain. The outdoor unit pumps refrigerant through the lines to the indoor unit, which then distributes conditioned air directly into the room.
Unlike traditional forced-air systems, ductless splits require no ductwork whatsoever. Installation only requires a small three-inch hole through an exterior wall to connect the indoor and outdoor units, making it far less invasive than installing a conventional ducted system. This also eliminates the energy losses commonly associated with ductwork, which can account for up to 30% of energy consumption in a typical home.
Ductless systems provide both heating and cooling through a reversible refrigerant cycle. In cooling mode, the indoor unit absorbs heat from the room air and transfers it outside through the refrigerant lines. In heating mode, the process reverses: the outdoor unit extracts heat from the outside air, even in cold temperatures, and delivers it indoors. Modern ductless heat pumps can operate efficiently in temperatures as low as -25 degrees Celsius, making them suitable for year-round comfort in the Fraser Valley climate.
Each indoor unit is controlled independently with its own remote control or wall-mounted thermostat, allowing precise temperature management in each room without affecting other areas of the home.
Single-Zone Systems
A single-zone ductless system pairs one outdoor unit with one indoor unit, making it ideal for heating and cooling a single room or open-concept area. These systems are the most affordable option, with installation costs typically ranging from $3,500 to $5,500 depending on the unit capacity and installation complexity. Single-zone systems are perfect for home additions, converted garages, bonus rooms, or any space where supplemental heating and cooling is needed without extending existing ductwork.
Because only one indoor unit is involved, single-zone systems are simpler to install, require less maintenance, and are highly efficient for targeted comfort in specific areas of your home.
Multi-Zone Systems
Multi-zone systems connect a single outdoor unit to two, three, four, or even five indoor units, each installed in a different room. This configuration allows independent temperature control in each zone, so every family member can set their preferred comfort level. Multi-zone systems typically cost between $7,000 and $15,000 depending on the number of zones and unit sizes selected.
Multi-zone ductless systems are the best choice when you want whole-home heating and cooling without ductwork, or when you need to condition multiple rooms simultaneously. They are commonly used in older homes, heritage properties, and multi-level residences where running ductwork would be impractical or too costly. Alpine Refrigeration can help you determine the right number of zones for your home.