We found a coupon for $39 for air duct cleaning & carpet cleaning for 3 rooms, we should have known this price is too good to be true. They came out with 2 guys in an old junkyard looking pickup truck and got in.
Even before opening one vent, the lead salesman told me that I need to clean the furnace and other stuff I couldn't understand and it will cost me $700 otherwise the regular cleaning would do nothing. Their coupon specifically says they "clean each duct to the furnace and back with rotating brushes", how would that not help??? I declined politely and told them to get off my property.
They don't do what they advertise and they are just scamers!!! BEWARE OF MOUNTAIN AIR DUCT SERVICES!