Installed Carrier Infinity 24VNA9 3-ton variable-speed AC in Montclair, NJ residence. Matched with FE4ANF003 air handler featuring Greenspeed intelligence. Utilized 3/8" liquid and 7/8" suction lines. Charged system with 7.2 lbs of R-410A. Integrated Infinity System Control SYSTXCCITC01-B for full communicating functionality. Achieved 20.5 SEER and 13 EER ratings. System operates between 25-100% capacity for optimal efficiency. Final testing showed 45-130 CFM/ton variable airflow.