FIELD CONTROLS CC 2000 User Manual

 

Page 8

Conclusion 

 
 
 

UV-Aire 

Model 

Airflow 

velocity 

(fpm) 

Percent Reduction 

of Bacteria 

Percent Survival of 

Bacteria 

Log Reductions 

of Bacteria 

UV-18 

500 

93.31 

6.69 

1.17 

UV-18 

1000 

71.99 

29.01 

0.54 

UV-18X 

500 

99.00 

0.95 

2.02 

UV-18X 

1000 

90.33 

9.67 

1.01 

 
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.    

Form #4291 08/01