Comment: Punctual, professional service where all the service features were fully explained. We were very satisfied with the service. The technician counted all the vents and found that we had 16 vents and not 19 as had been suggested when I made the booking for the service. We were charged correspondingly less than the amount that had been calculated. At the end of the service we were shown the before and after views of the air ducts which was quite impressive. Thank you.