Our most popular line of units, T-series are extremely versatile and can be used individually in smaller spaces or in multiples for larger areas to establish positive airflow patterns that will enhance the effectiveness of the units. The T-style configuration of these units has inlets on both ends and exhausts the filtered air from the center of this unit. Features (2) four-inch pleated, industrial pre-filters which catches the larger particles, extending the life of the (2) second stage, Merv 15, multi-pocket bag filters. The final stage of filtration are (2) 2″ thick activated charcoal after filters. Our disposable filters are easy to service and provide for simple, low-cost maintenance.