Field Controls CC 2000 manual Conclusion

Conclusion

UV-Aire	Airflow	Percent Reduction	Percent Survival of	Log Reductions
Model	velocity
		of Bacteria	Bacteria	of Bacteria
	(fpm)
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

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