An air purification system, includes a UVC light source arranged within an internal space of a purification chamber and adapted to irradiate the internal space with UVC, an airflow system arranged to introduce environmental air from outside of the air purification system into the internal space of the purification chamber and expel purified air from the purification chamber back outside of the air purification system, and a light blocking system arranged to block a substantial amount of the irradiated UVC from emitting outside of the air purification system, the light blocking system comprising a high-air-flow open structure mounted in the airflow system of the purification chamber, wherein the open structure comprises a front surface, rear surface and a thickness, wherein the front and rear surfaces have a plurality of open areas connected through the thickness, and wherein at least one of the plurality of open areas is of a size with respect to the thickness to block light from traversing the thickness when an angle of incidence is less than approximately 10 degrees.

A handheld device for treating air to a user includes an airflow path having an illumination chamber with a reflective surface, wherein the reflective surface is sufficiently reflective and configured to impart multiple reflections of at least a portion of the light introduced into the illumination chamber. The introduced light is produced by an onboard UV light generator, wherein the UV light generator can be cycled corresponding to at least one of a pressure and an airflow in the airflow path.

An air flow system for reducing pathogens in a breathable airstream in an environment has a device having an airstream intake for receiving a volume of untreated air located in a first position, an airstream outlet for expelling a volume of treated air, the airstream outlet located in a second position extending above the first position, a flow path extending between the airstream intake and the airstream outlet, at least one of a UV generator and a UV-C emitter optically coupled to the flow path, a power source operably connected to the one of the at least one of the UV generator and the UV emitter, and a pressure generator fluidly connected to the airstream intake, the pressure generator configured to impart a flow from the airstream intake to the airstream outlet, wherein the pressure generator can be at least one of a force of flow from in line pressurized source or provided by a fan within the housing, and wherein a portion of the flow path includes a UV-C highly reflective surface.

A diffuser includes a clip that attaches to a vent of a vehicle air conditioning system. The diffuser also includes a hollow scented body that emits a fragrance. The hollow scented body extends along a longitudinal axis and defines a cavity. The hollow scented body is mounted to the clip such that airflow from the vent is in a direction other than parallel to the longitudinal axis of the hollow scented body when the diffuser is attached to the vent.

Air filtration apparatuses, systems and methods for nitrous oxide and volatile organic compound (VOC) removal and non-VOC particle removal enable the removal of particulates, nitrous oxide-containing compounds, and volatile organic compounds from large volume enclosed environments. Systems incorporate HEPA filtration upstream from UV LED-assisted photo reaction chamber comprising a plurality of baffles having air flow-through airflow spaces are spaced apart along a duct, with a porous and permeable nitrous oxide-adsorbing filter oriented downstream from the UV-assisted photo reaction chamber further filtering the airflow in the system to remove nitrous oxide-containing compounds.

A process is provided for removing viruses and micro-organisms from building air by inactivation of those biological elements within an HVAC filter having exuding halogenated material therein. The filter for the HVAC systems has the exuded halogenated material applied with a tackified material via a sequential spraying operation prior to heat curing either of those materials. The filter can subsequently be formed with other laminated materials for increased efficiency, and pleated for use in the HVAC system. Both porous and non-porous substrate fibers can serve as the substrate web for the exuded halogenated material, preferably processed as a non-woven web during air filter fabrication

The present disclosure is directed to a novel redesigned or retrofitted cabin air filtration system utilizing an ultraviolet light, radiation, or an energy matrix membrane and related technology to eliminate toxins such as viruses, bacteria, mold, fungi, rickettsia, protozoa, etc. from the air system in a vehicle, such as an automobile, marine vehicle airplane, etc., thereby improving the current cabin air filter functionality and providing a sterile air distribution environment throughout the cabin of the vehicle or small area.

A system includes a mask having a filter. The filter is configured to capture aerosol particles. The filter may be formed from a material that is UVC durable and UVC transmissive. The system also includes a UVC LED configured to emit UVC radiation into the filter.

A light tube apparatus includes a tubular housing, a first light source, a second light source, a driver and a controller. The tubular housing having a first light passing window and a second light passing window. The first light source is for emitting a white light from the first light passing window in an illuminating mode. The second light source is for emitting an ultraviolet light from the second light passing window in a sanitizing mode. The driver is for converting an external power source to a first driving current to the first light source and a second driving current to the second light source. The controller is for determining when to enter the sanitizing mode or the illuminating mode based on a stored criterion.

Systems and methods are provided for disinfecting a cabin of a vehicle. In one example, a disinfection system comprises a controller, an ultraviolet radiation source, an air duct, and a steerable optical system. The ultraviolet radiation source is in communication with the controller, disposed within the air duct, and configured to emit ultraviolet radiation. The air duct comprises an inlet configured to receive air particles from within the cabin. The air duct comprises one or more internal reflective surfaces configured to reflect the ultraviolet radiation so as to disinfect the air particles within the air duct. The air duct comprises an outlet configured to transmit the disinfected air particles out of the air duct via the outlet. The steerable optical system is coupled to the air duct and configured to receive and selectively direct the ultraviolet radiation to disinfect the cabin. Additional systems and related methods are provided.