Completed duct cleaning for the Bliss family. Arrived to jobsite and introduced myself to Mr and Mrs.Bliss. The couple had moved into home since last June and Mrs.Bliss has had been suffering from bronchitis ever since. They’ve also had some work and additions done to home since their move and has even experiencing the fine dust in the air. I explained to them about the duct cleaning and what it does and how to identify the best options for their IAQ needs. After identifying the coughing and wheezing I was able to identify the issues were underlying in Element 1 after having all of my questions answered from the Blisses. After discussing that with them, I completed my thorough inspection in vents (home had 12 vents, 3 wall returns and 9 ceiling supplies all galvanized steel). I was able to confirm cleaning after seeing the state of the ducts and making sure it was sealed properly up in attic space and not leaking. After getting go ahead from the Blisses to clean, I placed Drop sheet