I found Dave's service through HomeStars after the last company we had our home ducts cleaned from disappeared. Dave/Julius is very professional, thorough and happy to answer any and all questions you might have about his service. He offered me a pretty good price that he had also given through one of the group deal websites. Dave and Markus were very thorough, and what I liked best was their honesty. I had asked Dave for a furnace cleaning as well, and he told me he's offer a complimentary check of the furnace first, and if it really needed it, then we could proceed with a cleaning. Since the furnace was new, when he inspected it, he found nothing warranting a cleaning, and did not try to sucker me into purchasing an unneeded service. We did discuss getting a potential HEPA filter in a few months, and it is clear he is looking into getting customers for the long-run. Assuming he'll give me as good a service and price next time, I plan to be one of those long-term customers.