Hydronic system every floor strainers clogged units were running around 325 psi semi hermetic carrier units water cooled. Anything over 325 psi just dumped refrigerant out of the rlf valve and lost capacity. Big electric bill in this place. These customers just figure ignore the equipment but they spend 50 times more in electric now than a service agreement would have cost. Pulling and cleaning 20 strainers eh not so much fun for one guy when they have been sitting there for 10 years.