Field Controls Solution For Great Indoors 24v - Manual (Page 9)

9
UV-AIRE ®
Air Purification System
To further investigate the effectiveness of UV on indoor
air quality, Microbe Management created a series of
tests designed to measure the cumulative effect of UV in
reducing airborne contaminants. The tests were
performed in a structure with two isolated 8’ x 8’ x 8’
rooms where air could be sampled. In the control room,
no UV was present, while the
other room utilized a portable
UV air purifier.
According to Bernard Kane,
Ph. D., of Microbe Management,
“Test results were very
encouraging. In both rooms, we
introduced a resistant, spore-
forming bacteria until the air was
saturated with 350 colonies per
cubic foot. In the room with the
portable UV unit, the spore count
was reduced by 50% in just 10 minutes and by 98%
within 30 minutes. In the control room, without UV, more
than 85% of the bacteria were still active after thirty
minutes.” Similarly, the leading consumer UV “tower”
model was also tested, but showed only minimal
effectiveness. (See chart below.)
Cumulative Tests: Multiple Exposures Dramatically Improve IAQ
A-coil irradiation, single pass, and cumulative tests
confirm that UV is an important and effective contributor
to a healthier home environment. UV technology used
with a quality filter (MERV rated 8 or higher) will
dramatically improve Indoor Air Quality. Additionally,
portable units can be used in combination with in-duct
models. This combination is strongly recommended for individuals with depressed immune systems, asthma,
allergies, or other respiratory conditions. For homes
without forced-air, portable UV air purifiers are
recommended to enhance IAQ. Also, health care
professionals, teachers, and day-care workers can
benefit from additional UV protection from influenza
and other viruses.
Conclusion: UV Is An Effective Part of “Whole House” Solution
This study introduced a common bacterium into a
galvanized air duct equipped with a UV light to
determine how effective the lamp would be in reducing
the bacteria with one exposure, or a “single pass.” The
tests were conducted at two speeds: 1125 cfm and 2250 cfm in an 18” x 18” duct. The UV lamp yielded at
least a 90% reduction of the test bacteria with a single
airflow pass at 1125 cfm, and at least 71% reduction at
2250 cfm.
Single Pass Test: UV Deadly for Airborne Microbes