Abstract: The system and method for testing a filter containment system. A containment system may include a filter housing with a diverging transition section mounted upstream and a converging transition section mounted downstream. An upstream test section can be arranged upstream of the diverging transition section. During a test of the filter, and aerosol can be dispersed substantially evenly across a cross-sectional area of the upstream test section. The downstream test section can be arranged downstream of the converging transition section. The downstream test section may optionally include a mixer that disturbs the airflow. The downstream test section can also include a sampling array, downstream of the mixer that simultaneously samples the airflow substantially evenly across the cross-sectional area of the downstream test section for the presence of aerosol.

Abstract: Embodiments of the invention provide a containment system having a primary air inlet and an alternate inlet. In one embodiment, a containment system includes a housing configured to retain a main filter, the housing having a primary air inlet and an access door configured to access an interior of the housing. The access door has an alternate airflow inlet. In another embodiment, an air distribution plate includes a front surface having a first edge and an opposing second edge, wherein the front surface is configured to allow air to pass therethrough. Flow resistance through the front surface is greater proximate the second edge relative the first edge. In yet another embodiment, a method for testing a filter includes closing a damper and flowing air into a containment housing through an inlet formed though an access door and across an air distribution plate to a filter, and testing the filter.

Abstract: The system and method for testing a filter containment system. A containment system may include a filter housing with a diverging transition section mounted upstream and a converging transition section mounted downstream. An upstream test section can be arranged upstream of the diverging transition section. During a test of the filter, and aerosol can be dispersed substantially evenly across a cross-sectional area of the upstream test section. The downstream test section can be arranged downstream of the converging transition section. The downstream test section may optionally include a mixer that disturbs the airflow. The downstream test section can also include a sampling array, downstream of the mixer that simultaneously samples the airflow substantially evenly across the cross-sectional area of the downstream test section for the presence of aerosol.

Abstract: Embodiments of the invention provide a containment system having a primary air inlet and an alternate inlet. In one embodiment, a containment system includes a housing configured to retain a main filter, the housing having a primary air inlet and an access door configured to access an interior of the housing. The access door has an alternate airflow inlet. In another embodiment, an air distribution plate includes a front surface having a first edge and an opposing second edge, wherein the front surface is configured to allow air to pass therethrough. Flow resistance through the front surface is greater proximate the second edge relative the first edge. In yet another embodiment, a method for testing a filter includes closing a damper and flowing air into a containment housing through an inlet formed though an access door and across an air distribution plate to a filter, and testing the filter.

Abstract: Embodiments of the invention generally provide a frame assembly having an integral holding frame/clamp. The frame assembly is typically mounted in a housing of an air handler or other air moving conduit. The holding frame/clamp is coupled to the frame assembly by a hinge. The holding frame/lamp is configured to retain a prefilter. When the holding frame/clamp is to a closed position, the holding frame/clamp urges a final filter sealingly against the frame assembly. The clamp holding frame/clamp is maintained in the closed position by a latch. The latch facilitates removal and replacement of the final ter rapidly without tools, thereby substantially reducing the expense associated with filter change out.