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Related Manuals for Field Controls 4291UV-AIR
Summary of Contents for Field Controls 4291UV-AIR
- Page 1 Efficiency Of Bacterial Disinfection By A Duct Mounted UV-Aire Air Purifier Kane Environmental Assays Sanitary & Environmental Microbiology Bernard E. Kane, Ph.D. 1706 Canterbury Rd Greenville, NC 27858 Ph. 252.355.6789 Oysterdoctor@aol.com For:...
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Page 2: Table Of Contents
Table of Contents Background ..........................3 Organism.........................3 Testing Structure......................3 Testing Airflow Rate ......................3 Organism Applicator......................4 UV Device ........................4 Air Sampling Method.......................4 Test Apparatus ........................4 Testing Procedure ........................5 Tables..........................6-7 Table 1: Control Data ......................6 Table 2: UV-18 Test Data Results ..................6 Table 3: UV-18X Test Data Results................7 Conclusion..........................8 Page 2... -
Page 3: Background
Background This product study evaluates the effectiveness of the UV-Aire air purifier in reducing the levels of bacteria with a single pass through a simulated air duct system. This device is designed to irradiate the air as it circulates through the home, so the single pass evaluation is the worst-case scenario use of this device. -
Page 4: Organism Applicator
UV D EVICE A Field Controls UV-Aire air purifier model UV-18 was mounted onto the center of the side of the test duct 6 feet from the exit end of the chamber. The lamp is a UVC germicidal lamp (non ozone producing) 18 inches long with a UV output rating of 73 W/cm at 1 meter from the lamp. -
Page 5: Testing Procedure
Testing Procedure The testing was performed in two stages. The first stage operated the test chamber with the lamp off. (See table 1) This developed the control data or the base line bacterial levels for the comparison. The second stage operated the test chamber with the lamp on. (See table 2) Two airflow rates were used to evaluate the lamp effectiveness based on exposure time. -
Page 6: Tables
Table 1: Control Data (testing with lamp off) Airflow Sample Air Sampling Serratia marcescens Corrected Particle CFU/FT of air Velocity Number Duration (min) Positive hole count Counts (count/min) Total Corrected Total min. = 4 = 1076 269.00 Particle counts 1000 1000 1000 1000... - Page 7 Table 3: UV-18X Test data and results (testing with lamp on) Serratia Airflow Corrected CFU/FT Sample Sampling marcescens %Survival Velocity Particle of air Number Duration Positive hole CFU/Control Reduction Effective (fpm) Counts (count/min) (min) count 1000 1000 1000 1000 Total Corrected Total min = 12.5 = 130...
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Page 8: Conclusion
Conclusion UV-Aire Airflow Percent Reduction Percent Survival of Log Reductions Model velocity of Bacteria Bacteria of Bacteria (fpm) UV-18 93.31 6.69 1.17 UV-18 1000 71.99 29.01 0.54 UV-18X 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.