A multi-zone system is a ductless heat pump in which one outdoor unit serves two or more indoor heads, each with its own line set and control. Every head conditions its own room or zone at its own set temperature, while the shared outdoor compressor varies its output to match the combined demand of the heads that are running.
Why it matters to you
In Fraser Valley homes without ducts, a multi-zone system can serve the main floor, bedrooms, and a basement suite from one outdoor unit, which keeps exterior equipment to a minimum on smaller lots. Because each zone has its own control, a suite occupant can set their own temperature.
Practical guidance
Ask how each head is sized to its room and whether a multi-zone or several single-zone systems suits your layout better, since the right answer depends on the number of rooms and line set routes. Make sure each head has a clear condensate drain path.