My experience was pretty similar, although our house is a bit larger with two floors and several vents. The technician told us that the time mostly depends on the size of the home, the number of ducts, and how much buildup is inside the system. Everything was completed in one visit, and they worked steadily without making a mess. Before scheduling the appointment at Comfort Clean service, I read some helpful information about Comfort Clean — 40+ years serving Toronto homeowners. It explained what affects the length of the service and what homeowners should expect during the visit. That gave me a realistic idea of the timeline before anyone arrived. In total, the cleaning took around three hours, and afterward the house felt noticeably fresher. I thought the process was straightforward from start to finish.