8 system Commercial PM 2nd visit- Checked heating operations of all package systems. Replaced 2-20x35x2, 4-2025x2, 1-18x25x1, 4-20x25x2, 2-20x20x2, 2-15x20x2,1-14x25x2, 4-20x25x2, 2-15x20x2, 1-14x25x2, 20x35x2, 4-20x35x2, 12-20x25x2, 1-18x25x1, 2-20x20x2, 4-15x20x2, and 2-14x25x2 filters, Checked capacitor outputs and amp drawls, Inspected heat exchangers, Checked delta T, triggered safety switches, Cleaned flame sensors, Cleaned burners, and cleared drain line. Systems are operating properly at this time. Roof access in the back Need to bring 2-A36 belts, AX36 belt, BX50 belts next visit