Came in today because costumer had a musty smell in the house. When testing system found that system hasn’t been properly maintain causing humidity from the basement to create biological growth inside the system, also found duct full of dirt dust and pet hair. Let’s costumer know about this issues and provided options. Costumer decided to move forward with repairs and enhancements, work was done and tested Office will contact costumer to schedule duct cleaning service. Thank you for choosing TE Certified!