We replaced five HVAC units at a bank branch. We upgraded the old 10 seer R22 to 14 seer 410A equipment. We also added auxiliary drain pans, replaced the entire condensate drain system, & installed new upgraded air filtration units that have 1 year filters. The increased filter suface area will allow for increased airflow, which will also increase efficiency and clean the air far better. We have been installing the filtration units on most of our installs where it was possible to do so. The auxiliary drain pans were added to have a backup for drips.