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UV-Aire
Airflow
Model
velocity
UV-18
UV-18
UV-18X
UV-18X
The testing showed the UV-Aire lamp yields at least a 90% reduction of the test bacteria
with a single airflow pass through a duct system at typical airflow rates. This efficiency
will not be the same for all bacteria and molds since each organism requires different
exposure times at the same UV output energy level.
At the higher velocity, the lamp still reduced the bacterial levels by at least 71 % at a 50%
decrease in the exposure time. Since the reduction efficiency is based on lamp UV
output and exposure time, the assumption can be made that decreasing the exposure
time to the UV light is similar to testing an organism that requires a higher UV energy
requirement to kill the bacteria. The log reductions in bacterial levels were very close to
theoretical values. Within the limits of testing accuracy, twice as many log reductions
(0.54 vs. 1.17 and 1.01 vs. 2.02) occurred with twice the exposure time.
This testing and the results clearly show that the exposure of the air to the UV light of the
UV-Aire will reduce levels of airborne bacteria.
Percent Reduction
of Bacteria
(fpm)
500
93.31
1000
71.99
500
99.00
1000
90.33
Percent Survival of
Bacteria
6.69
29.01
0.95
9.67
Conclusion
Log Reductions
of Bacteria
1.17
0.54
2.02
1.01
Form #4291 08/01
Page 8
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