For this job, I worked on a multi super tune-up on two gas furnace systems. I went through all the mechanical and electrical part of the systems and checked for maximum efficiency. Filters were replaced and outside condensers were washed. UV bulbs we're non functional, and customer approved for replacement next Friday. A duct cleaning for the upstairs unit was also recommended, I explained to the customer that the duct cleaning includes, blower clean, coil clean and microbial mist for the ducts. Customer mentioned she will talk to her husband and make a decision on that. Thank you for choosing Comfort Experts, have a great day!