It has been several years since I had air ducts cleaned. I called Cool Breeze yesterday and was given a 2 hour window today for service. He stopped by on time, put on booties, and looked inside my return vent. He told me they were just fine and no need to service today. Then he looked at my dryer vent and showed me how he determined that it was also fine and needed no service today. Based on the honesty and good advice, I am recommending Cool Breeze even though they ended up doing nothing for me today. I will keep their number and call back when I do need service!