The Air-Lec seal is the perfect answer for freezer and cooler or where a positive seal is require. The Air-Lec Door Seal connects in parallel with the Air-Lec Swing Operator and functions automatically with the operator. The pressurized cylinder releases the spring tension on the door to aid in opening. Upon closing, the mechanical door seal contacts the fork, and the powerful spring firmly draws the door tight to prevent air circulation and frosting. The exhausting air acts as a cushion to prevent slamming. The air seal does not prevent manual operation of the door. A second Air-Lec Seal can be installed on larger doors.