This is the second year in a row that we have used SmogBuster Inc. We rented fans both times for ventilation purposes. They shipped the items to us and they arrived promptly on time. All that we had to do was plug them in and they worked great. We are currently looking into purchasing those ventilation systems. I would recommend them to anyone needed this type of system, they do work and they worked well for our needs! All of my expectations were met completely.