Ductless Mini-Split
Zoned heating and cooling without ductwork for flexible comfort control.
About Ductless Mini-Split
Ductless mini-splits consist of an outdoor compressor connected to one or more indoor wall-mounted units via small refrigerant lines. They provide targeted heating and cooling without ductwork, making them ideal for room additions, older homes, and zone control. Mini-splits are the most energy-efficient residential HVAC option available.
Pros
- No ductwork required
- Individual room/zone temperature control
- Highest efficiency ratings available (30+ SEER)
- Both heating and cooling
- Very quiet operation (19-30 dB indoor)
- Easy installation (small wall penetration)
- Longest lifespan of any HVAC system
- Federal tax credit eligible
Cons
- Higher cost per ton than central systems
- Indoor units visible on walls
- Each zone needs its own indoor unit
- May not provide uniform air distribution like ducted systems
- Filter cleaning required monthly
- Not ideal for very large open-concept spaces
Best For
- Homes without ductwork
- Room additions, garages, sunrooms
- Historic homes where ducts cannot be added
- Zone control needs (different temps per room)
- Supplementing a central system in problem areas
- Small apartments and condos
Popular Ductless Mini-Split Brands
Frequently Asked Questions
How many BTU mini-split do I need?
General guideline: 20 BTU per sq ft. A 500 sq ft room needs about 10,000 BTU. Factors like ceiling height, insulation, sun exposure, and climate affect sizing.
Can mini-splits heat a whole house?
Yes, with a multi-zone system (one outdoor unit, multiple indoor units). A 4-5 zone system can heat/cool a typical 2,000 sq ft home. Cold-climate models work well in all US states.
How long do mini-splits last?
Mini-splits typically last 20-25 years with proper maintenance, longer than central systems. The key is regular filter cleaning (monthly) and annual professional maintenance.
System Capabilities
Other Systems
Estimate Your Cost
Use our calculator to estimate Ductless Mini-Split costs for your home.
Cost Calculator