Method and device for enhancing the reduction of pathogens, allergens and odor-causing agents

A system that reduces a level of substances in air within an environment, the system comprising:

• an inlet passage configured to receive inlet air from the environment;
• a humidifier input configured to receive water vapor from a humidification device;
• a mixer portion where the inlet air and water vapor are mixed to form an air/vapor mixture;
• a controller in operative communication with the humidification device;
• a temperature sensor configured to sense the temperature of the inlet air and/or the air/vapor mixture;
• a humidity sensor configured to sense the humidity level of the air/vapor mixture and in communication with the controller,
• the controller being configured to adjust operation of the humidification device based on the sensed humidity level so as to bring the humidity level of the air/vapor mixture to about 70 percent to about 100 percent;
• and
• a treatment chamber wherein the air/vapor mixture is subject to a photocatalytic oxidation treatment, the treatment chamber including one or more ultraviolet light sources and including photocatalytic material configured to receive ultraviolet light emitted from the one or more ultraviolet light sources.