Our philosophy is to supply the highest quality HVAC, IAQ and Electrical product lines to Contractors which will allow them to set themselves apart from other Contractors. All product lines have been carefully selected to assist both the Contractors and Homeowners in increasing the efficiency of their entire HVAC system. Fettkether LLC is the ONLY Wholesale company in the nation that supplies our own line Plastic HVAC ducting components which assemble without screws or fasteners and also seal to prevent air leakage. (No taping or mastic required).