How Ultraviolet Light
light possesses just the right amount of energy to break organic molecular
bonds. As micro-organisms pass by the UV rays radiated from the ultraviolet
lamp, this bond breakage translates into cellular or genetic damage for
micro-organisms, such as germs, viruses, bacteria, fungi (like molds), etc.
This results in the destruction of the micro-organisms.
UV Light Air Purifier
Facts & Studies
The Centers of
Disease Control (CDC) recommends the use of ultraviolet light with
simultaneous use of HEPA air filters,
both of which are offered in the
EnviroFry 6 Step Air Purifier.
The U.S. government
now specifies that UV light should be used in air handling units to
improve indoor air quality in government buildings, by controlling
airborne and surface microbial growth.
- The Air Institute of Respiratory
Education suggests UV lights be used in buildings for indoor air
quality purposes, and states that may be the final line of defense
against those diseases that have developed resistance to drugs, such
as tuberculosis and others.
According to the
Aerobiological Engineering Dept. at Penn State University, the
ultraviolet component of sunlight is the main reason microbes die in the
outdoor air. The die-off rate in the outdoors varies from one pathogen to
another, but can be anywhere from a few seconds to a few minutes for a
90-99% kill of viruses or contagious bacteria.
Centers of Disease Control (CDC) recommends UV lights in
homeless shelters to prevent the spread of disease, particularly TB
A study by Air & Waste
Management Association found the combination of a HEPA air filter and
germicidal UV lamp reduced bacteria by 80% in a 3072 cubic foot chamber.
UV Light Air Purification
UV Lamps Reduce Worker Sickness
This study tested 771 employees in three
different office buildings. The UV lights, which were installed in the
ventilation system, were operated in three cycles of four weeks on, twelve
weeks off. Measurements showed a 99% reduction of germs on irradiated
surfaces inside the ventilation system.
During some weeks, there was a 40% reduction
in respiratory symptoms, and a 30% reduction in mucous problems in
individuals examined. When the lights were activated, muscle complaints
among nonsmokers were reduced by 50%, and work-related breathing problems
decreased by 60%.
Purification Technologies Comparison