Carlos was fantastic. He was on time, professional, friendly, knowledgeable, and accommodating to our needs. He took great care protecting our antique furniture, wall corners, carpet, and hardwood floors. He showed us photos of things he discovered in the 30+-year-old ducts that had never been cleaned. He also gave good advice on what level of filters and replacement schedule to use on the furnace to save money. What more can you ask for? I highly recommend Carlos and the Ductworks service. They are lucky to have Carlos.