I performed a maintenance on both systems. I found some growth on evap coils. The coils/ primary pan pans need to be cleaned in place. I sprayed some cleaner/ sanitizer inside air handlers. I checked pressures, the 2nd fl system is 1lb low on 410a. My superheat is 33degs. I hosed down condenser coils of pollen. I vacuumed out drain line with cleaner. The 2nd fl drain line was very dirty. We discussed about uv lights. They will like to move forward on the economy uv light on each air handler. The 1st floor return plenum bottom base has some growth and at one time water was dripping and ruined the bottom base. Need to put in new bottom base with a new duct board, then sanitize the box.. The second floor system does have wear and tear due to age.. The office will reach out to set up appointment for work that needs to get done.. Doug will like the phone number to our duct cleaning guy we use. He is interested in having the ductwork cleaned.