Frame assembly for an air filter

A frame assembly adapted for installation in a filter housing, the frame assembly comprising:

• a frame adapted to receive a filter unit of a predetermined size;
• and
• at least one clamping mechanism for clamping said filter unit, the at least one clamping mechanism comprising an actuator arranged at a front member of said frame, wherein said actuator is operable between an open position and a closed position while activating the at least one clamping mechanism to clamp said filter unit;
• wherein said actuator is arranged having at least one actuator element facing a back member of the frame, and wherein during operation of said actuator, a free distance “D” between the at least one actuator element and the back member of the frame corresponds to an in-depth size of said predetermined filter unit size, thereby enabling operation of the actuator between the open position and the closed position only if the inserted filter unit abuts said back member of the frame.