Abstract: An annunciation system for an HVAC fan coil unit is disclosed, comprising: (a) a housing having a front panel defining an opening for maintenance of a component inside the housing; (b) spaced apart LED's arranged in a row on a substrate that is mounted horizontally on the front panel adjacent to the opening; (d) a door mounted offset to the front panel and covering the opening and the LED's; and (e) an electronic controller coupled to memory. The electronic controller is configured to automatically energize predetermined ones of the LED's to emit light. Light emitted from the energized LED's is deflected by the door onto exposed portions of the front panel to cast an indirectly visible glow indicative of a status, condition, or fault of the HVAC fan coil unit.

Abstract: A filter assembly for filtering water in an aquatic structure having a housing with a flow inlet and a flow outlet and filter media between the flow inlet and the flow outlet. A vortex distributor is supported in the housing to distribute fluid evenly over the filter media and partially separate debris from the fluid. The vortex distributor has a conically shaped body portion with an upper side, a lower side and a vortex opening. The vortex opening is substantially centered in the body portion and a plurality of vanes are supported on the upper side of the body portion around the vortex opening, the vanes curving away from the vortex opening to form a substantially planar upper surface.