FORT MYERS, Fla. – Every year there was at least one unexplainable low-refrigerant service call,but when more than 10 occurred in 2009, executives at HVAC contractor Advanced Air and Refrigeration suspected more than phantom leaks that were difficult to find. Professional thieves, who have been stealing R-22 and R-410A nationally, were service manager Ronda Szymanski’s initial suspects. However, when a company service tech found a butter knife laying next to a central air conditioning condenser depleted of refrigerant, and its service port visibly damaged, Szymanski knew the loss was due to huffing. She suspected that the trend of inhaling refrigerants for a free high, which has killed hundreds of teenagers nationally, had finally reached Fort Myers, Fla., where Advanced Air has run a family HVAC service contracting firm for 25 years.