Air filtering units; Air filters for domestic use; Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Filters for air conditioning; Personal air filtering units for intaking air, killing viruses in the air, and outputting virus free air; Personal air filtering units for intaking air, removing microbes from the air, and returning air having microbes removed; Personal air filtering units for filtering bacteria from the air; Personal air filtering units ...