We install mini-split systems primarily from Mitsubishi Electric and Daikin. These two manufacturers carry the deepest residential and light commercial mini-split lines, the strongest warranty support, and the largest installed base in the Phoenix area, which matters for long-term parts availability. For specific applications we also install Fujitsu and LG mini-split equipment.
Our mini-split installs follow ACCA Manual J for the zone load calculation, manufacturer line set sizing tables for the refrigerant lines, and EPA Section 608 for refrigerant handling. Most current mini-split equipment runs R-410A, with R-32 and R-454B equipment beginning to arrive in 2025 and 2026 per the EPA refrigerant transition. We carry certifications for both refrigerants.
Line set runs follow manufacturer maximum length limits. Vertical and horizontal limits matter because excess line set length affects refrigerant charge and performance. Most residential installs run between 25 and 50 feet of line set, which is well within manufacturer specs. Longer runs require careful line set sizing and refrigerant adjustment, both of which we handle as part of the install.