The Paltech Multi Directional Outlet range also includes 2 additional vents : a 230 x 230 mm exhaust grille, and a 360 x 535 security relief vent, used for pressure relief in evaporative cooling systems.

The exhaust grille utilizes an outer face with eggcrate inserts. The grille can be used with or without adaptors and use the same adaptors that suit models 601 & 602. The exhaust grille is model 600.

The security relief vent utilizes an outer face with 6 eggcrate inserts. A rear flap seals the rear of the vent, but opens under positive pressure conditions, allowing airflow to pass through the vent. The vent is ideal for evaporative cooling installations where the cooler is operating in properties where external exit points (such as doors and windows) are closed. The security relief vent is model 655.