Comment: Our carpets turned out beautifully and the technician had a very good attitude and worked hard to achieve this result. However I am concerned, because, at the end of the work, both of our carbon monoxide detectors sounded an alarm. We had to call the fire department and they came out and we had carbon monoxide present in our house. They advised us to open all the doors and windows for a while and then close the house up and, if the alarms sounded again, to call them back. All was well, but it seemed the likely cause was the technician's vehicle running on and off in our driveway during the cleaning process. I am bringing this to your attention, as a deadly situation could happen, especially if there were no carbon monoxide alarms in the house.