Its been at least a couple of years since we last had our air ducts cleaned, and it was more than necessary to get it done asap. My wife and I read some reviews and asked around to find a good company. San Francisco Green Carpet Care came highly recommended and we scheduled an appointment with them. Justin, the technician, explained everything to us in detail and made sure we weren’t sitting in a cloud of dust while cleaning the ducts. My wife has an extreme dust allergy, another reason why we’d decided to get the air ducts taken care off, and we were worried that she wouldn’t be able to stay at the house while our ducts were getting done. Yet, Justin assured us that she would be able to stay since his company uses a “negative airflow machine” which prevents the dust from escaping and can’t bother anyone. We really appreciated Justin’s work and friendliness. There is no question in our mind that for any future cleaning needs we will call San Francisco Carpet Care again. Thank you Justin, you are the Best!!!