Most Mini-Split manufacturers have both minimum and maximum length requirements and most outdoor units are shipped with a refrigerant charge.  Refrigerant lines that are too long will compromise a system’s performance. Lines that are too short may result in premature compressor failure!

Our DuctlessAire mini split systems include a 25’ length line set. The minimum that it can be cut down to is 10’. If cut down it must be re-flared. If you need longer than 25’ you may purchase a run up to 50’ from a HVAC parts house. Refrigerant lines cannot be spliced together it should be one continuous run. Any adjustment to the 25’ length may require an adjustment to the refrigerant charge.