Bill & Brendan did an excellent job with my duct cleaning. In fact, Bill had come with another team member about 2 weeks earlier and noticed a problem with my cold air returns which prevented them from doing the work at that time. Essentially, the prior owner had left an 8 x 4 section of cold air return missing. Even my home inspector had NOT noticed it 12 months before. However, Bill expertly explained how I could fix it cheaply and effectively. When they came out 2 weeks later, they did a great job and when they were done you couldn’t tell they were there except for the squeaky clean vents & furnace!