Arrived onsite for ac maintenance on 1 units. Asked customer to turn AC on to confirm operation. Changed 310 media filter provided by climate plus. Checked all electrical. Chemically Cleaned outside unit, measured pressures for 410a at 102/196 psi with 7.2 degree sub cooling with outside temperature at 53 degrees. Measured temperature drop at 25 degrees. Cleaned evaporator coil and condensate line. Performed efficiency test utilizing MeasureQuick. Noticed the need for a duct cleaning; will send quote. System running as it should.