The Holyoake CPMS Perforated Maximum Security Diffuser has been designed specifically for maximum security prisons. The diffuser has been tested to meet grade 2 requirements of American Corrections Standard ASTM F2542 (Standard test methods for physical assault on ventilation grilles for detention and correctional facilities).
Perforated Maximum Security Diffuser
- Heavy duty construction for maximum security prisons.
- 3mm stainless steel mounting frame supplied with all required holes for installation.
- 1.8mm thick perforated stainless steel diffusion plate.
- One piece construction face plate provides a seamless finish.
- 2mm diameter holes for 22% free area.