Jon Wayne Heating & Air Conditioning came by and inspected the whole system. They even cleaned out the unit outside which had debris inside it. Washed all the coils thoroughly. The blow box in the attic has a HEPA filter and he took a picture to prove it was clean and did not need replacement @ this time. I have them in stock and he offered to replace it if it needed it. Everything checked out good. I am very happy I KNOW my system is performing well.