Abstract: A system for filtering and purifying air within a closed environment. Air is drawn through a sequence of six filtration and purification stages, comprising, in order, an electrostatic prefilter to remove airborne impurities >=3 microns, an ultraviolet light source, a catalytic surface effective for breaking down hydrocarbons, a HEPA or other particulate filter for mechanically capturing airborne particles, a gas absorption filtration medium for removing volatile organic compounds and comprised primarily of activated charcoal, and an ionization module. The UV light is directed both upstream and downstream. The catalytic surface is semitransparent to UV light so that UV light strikes and kills microbes in the HEPA or other particulate filter medium.

Abstract: An infrared, room heater system for installation in a wall or on a floor. An electric fan assembly draws room air into a housing, then through three parallel, air transit channels where the air is heated by infrared radiation within and about a heat exchanger assembly, and then back out into the room. One or more ceramic heating elements attached to a first copper plate emit infrared radiation when electrically energized. The first copper plate lies adjacent to, but spaced away from, a second copper plate such that radiation emitted from the heating elements reflects back and forth between the plates. Room air passed between the copper plates is heated by heat radiation concentrated between the plates, thereby achieving both energy and space efficiency.

Abstract: An electric space heating system Air at ambient temperature is drawn by a fan assembly into the system through an air inlet filter, then moves through a “Z”-shaped box within a heat exchanger assembly where it is heated by quartz heater tube assemblies The heated air is further heated as it passes by copper plates within the box and then exits the system Each tube assembly includes an electrically-resistive filament within the lumen of a quartz tube that is translucent to Infrared radiation emitted by the filament Oppositely—directed, ceramic insulators, attached to opposite ends of the tube, in combination with a ceramic, electrical connector block, support the tubes within the box and provide electrical contacts for an electric power source to energize the filament The block has a spring-loaded, sliding electrical contact that facilitates installation and removal of the tube assemblies through a utility access cutout.