The Carbo-Pak extended surface air filter has been engineered to remove odours from commercial, industrial and institutional buildings. It can be installed in built-up filter banks or side access housings. The carbon impregnated media achieves a MERV 8 efficiency rating. Due to its completely rigid design, the Carbo-Pak eliminates the need for retainers and special external wire media supports in variable air volume applications. The Carbo-Pak utilizes a high density filter media composed of melt-blown synthetic fibers which is self-supporting in the filter. The media is evenly impregnated with fibrous carbon material. The media backing is continuously bonded to a galvanized expanded metal backing with 95% open face area. To achieve an optimum odour removal capacity while minimizing pressure loss and replacement frequencies, the Carbo-Pak incorporates aerodynamically wedged pleat design. Stabilized pleat configuration and filter media reinforcing is accomplished through the use of die cut pleat spacers. The result is a rigid, stable filter with consistent performance under a variety of operating conditions. The Carbo-Pak is offered in two variations; non-header and single header.