Upon arrival for filter change homeowner showed me to indoor access to the unit that was in the attic Provided me with new filter to replace Removed old filter and installed new filter Homeowner will dispose of old filter I asked homeowner if she had any questions or worries regarding her unit that I could take a look at while I was at the home. Homeowner stated she had no questions and system was operating fine. Thank you for choosing Comfort Experts, have a great day!