An in-the-room filter replaceable gel seal filter module is available as a motorized or non-motorized unit with a HEPA filter that is 99.99% efficient on particles at 0.3 micron or larger. (Optional ULPA - 99.999% at 0.12 micron). Simply remove turn screws for access to the filter. Swivel latches release filter so that it can be lowered into the room. Easily done by one person. New filter can then be placed into unit and secured with swivel latches.