For this cooling tune-up I inspected the customer's main system and the master bedroom system. Inspected the furnace, evaporator coil, as well as the condenser. Everything was measuring within manufacturer specs and running well. I did recommend to the customer that we install a float switch on both systems as there is no water safety on the primary drain lines and if the primary drain line were to get clogged up then water would then dump into the pan and risk water damage to the ceiling. I also recommended installing better filtration with April air filters as these are accordion style filters and create a complete seal in the filter base capturing more particulates and allowing less dust to circulate in the airstream.