A ductless mini-split (or just “mini-split”) is a heat pump system that uses small refrigerant lines to connect an outdoor unit to one or more indoor heads mounted on walls or ceilings — no ductwork required. The indoor heads condition individual rooms or zones.
Where mini-splits shine in Colorado
- Basement and attic conversions
- Garages, shops, and home offices
- Additions where extending ductwork is impractical
- Older homes with hot-water radiator heat and no central AC
- Mountain cabins where zone heating saves energy
- ADUs (accessory dwelling units)
Single-zone vs. multi-zone
- Single-zone: one outdoor + one indoor head. Best for one room or open space.
- Multi-zone: one outdoor unit, 2-4+ indoor heads. Each zone controlled independently.
- Whole-home ductless: 5-8 heads from 1-2 outdoor units. Full home heating + cooling without ductwork.
Most mini-splits are heat pumps and qualify for the same rebates as central heat pumps.
Related: Heat Pump, Refrigerant. See also: mini-split installation.
Keep Reading
Right Way Mechanical is a family-owned HVAC contractor serving Wheat Ridge, Arvada, west Denver, and the Colorado foothills.