Client states that air filter gets very dirty and is black every month when it is going to get changed. Noticed that return collar is very bent and damaged at return grill where the flex goes into it. Client approved for us to return tomorrow October 16 to make minor duct repairs and make sure there is no air leakage anywhere else in the duct line. Explain to client that we would inspect the other ductwork once we are in the crawlspace to make sure that there is no other tears or rips in ductwork. Also, there was no trap on drain. There should be a trap on drain because it’s on the negative pressure side of the unit. Got approval from client to Install P-trap on package unit. System is draining normally now at this time. Collected full payment for drain line repair, collected $305 deposit for duct repair. Need to collect $298.10 upon completion. Client signed up for an annual membership.