Acquired a "Whole House Air Duct and Dryer Vent Cleaning" service coupon through Living Social. Voucher said they would clean unlimited supply ducts, one return and a dryer vent. Apparently a company called Carr and Sons is a subcontractor to Living Social. Upon arrival, Carr did not know what service they were to perform and did not know my name. They requested a tour of the home to identify the locations of heating ducts and return ducts. Upon end of tour they announced the fee would be ten time the amount of the purchase price of the coupon. This amount was in addition to the already paid coupon price. They were asked to leave. However, sensing a scam and sensing a refund from Living Social would be difficult or impossible, upon reflection I asked they perform the cleaning stated in the coupon description and nothing more. They stated it would not be beneficial or worth it to me. I then asked, if this was not a scam, why had they come to my home to perform a service that would not provide any benefit? I told them I thought they were con-artists and escorted them off my property.