Prompt service. I was told a vent was too clogged and required a furnace installer to open vent and contractor to open the wall as the blockage was stuck in a bend, asking homeowner for coat hanger and long stick. Reps feared blockage might be pushed into furnace if forced. Going into the basement it was discovered the vent was disconnected from the furnace, several feet away. Late for next appointment, they left 5 vents untouched, no cleaning and no disinfectant. I looked out the door and they were packing up. We had to chase them to give equipment left behind. I was not provided any "after" photos. I was charged by footage, but, received a smaller refund for 5 uncleaned vents based on number of vents. Staff was friendly and respectful, but, the service was disappointing.