A ductless installation involves mounting an indoor wall unit connected to an outdoor condenser via refrigerant lines, eliminating the need for traditional ductwork. This system, also called a mini-split, provides targeted heating and cooling to specific zones. Installation requires precise line-set routing, electrical connections, and refrigerant charging according to manufacturer specifications.
Technical Details
Ductless systems operate with indoor wall-mounted or ceiling-mounted units paired to outdoor compressor units. Line sets typically range from 15 to 50 feet in length. Installation requires proper evacuation to 500 microns, accurate refrigerant charge based on line length, and electrical work meeting local codes. Most units operate on 208-240V single-phase power.
Applications and Benefits
Ductless systems suit retrofit applications, room additions, and properties without existing ducts. They offer efficiency ratings of 16-25 SEER2 and support individual room temperature control. Installation time averages 4-8 hours per unit, making them faster than traditional systems.
Installation Considerations
Professional installation ensures proper condensate drainage, line-set insulation, electrical compliance, and vacuum procedures. Wall penetrations require sealed sleeves to prevent air leakage. Systems require permits and inspections in most jurisdictions.