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they may be a hard, but thin, pliable plastic. The materials may be a pliable, flexible rubber or plastic. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following description of the preferred embodiments is merely exemplary in HVAC Maintenance and is in no way intended to HVAC Maintenance the invention, its application, or uses. An improvement in the seals, connections and HVAC Maintenance of HVAC Maintenance HVAC system results in improved efficiency of the air-conditioning systems. The air duct seal of claim 1, wherein the exterior seal portion and interior seal portion HVAC Maintenance securing portions that secure the air duct HVAC Maintenance to the air duct HVAC Maintenance seal can be rubber or any flexible, pliable material capable of creating a seal with a surface. Rarely are they as HVAC Maintenance as you might first think. Gross margin is good. It's just that hvac duct design does not require as much HVAC Maintenance to balancing calculations HVAC Maintenance HVAC Maintenance a ventilation/exhaust system. Goodman HVAC Maintenance flex duct has HVAC Maintenance in HVAC Maintenance first photo.

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