Upon arrival customer showed me and area that was growing microbial growth on the ceiling in the air handler room. I went up in the attic to where it was and I found the duct work not sealed and a couple holes. The duct work needs to be replaced I also recommend installing a pure air x and a EAC 20x30x1 filter Talked to customer about signing up for our membership program and all the benefits they get with it. Customer declined at t(is time. He want to wait to see the cost of the duct work.