Abstract: An air filtration system includable in and for HVAC equipment includes one or more intense field dielectric filter units and a field charging unit retained in a support structure or cabinet by a removable door which includes control circuitry and contactors engageable with corresponding contact members on a filter unit and the field charging unit for supplying high voltage DC potential to the respective units. Each filter unit includes a filter core comprising a stacked array of filter elements formed of dielectric sheets interconnected by elongated spaced apart ribs forming flow passages. The field charging unit and the filter units are removable from the support or cabinet for cleaning or replacement by opening or removing the door. An interlock switch and a field shorting mechanism are actuated during servicing or replacement of the system components.

Abstract: A humidifier (10) is disclosed having a top portion (11), a middle portion (12) and a bottom portion (13). The middle portion is essentially a water tank which provides water to be used in humidification. The bottom portion has a floor (41) and side walls (42) extending from the floor to form a tub (43) having a select height (SH1). The bottom portion is configured so that should water be uncontrollably released from the middle portion, the water level within the middle portion (MPEWL) will reach an equilibrium level with the catastrophic water lever (CEWL) within the bottom portion below the selected height of the bottom portion (SH1). When the middle portion water lever (MPEWL) reaches the same height or equilibrium lever with the bottom portion catastrophic water lever (CEWL) the flow of water from the middle portion will cease. As this equilibrium level is below the select height of the bottom portion (SH1) the water will be fully captured and will not overflow onto the underlying floor.