I called up Brian of All Ducts Cleaning last week for an estimate for cleaning all air ducts and a dryer vent of my house, giving him the description of my house including the number of vents/grills involved. He gave me an estimate promptly over the phone that was surprisingly low and that was exactly what he charged me at the completion of an excellent work. He arrived punctually with all the special equipment, and performed all the work very efficiently and professionally. I would recommend him without reservation.