Please note that many variables take place in a real world environment that make actual calculating very difficult (air flow, humidity, distance of micro-organism to the UV light and time). View Kill Chart link at the end of this introduction.
However, it is proven that UV light will kill any DNA-based organism given enough dosage and that UV light breaks down DNA over a cumulative basis.
Therefore, as air circulates through the ductwork of an HVAC system containing a UV light, like the SafeGuard UV Cleanser, the UV light continuously cleanses the air. If a micro-organism is not effectively eradicated on the first pass through the ductwork, the UV light will continue to break its DNA down on subsequent passes.
In addition, micro-organisms typically do not sit in a static environment in HVAC systems except on coils which can be exposed to our lights. In fact, micro-organisms breed micro-organisms if not controlled. The UV light process helps to reduce the incidence of inhaled exposure of microorganisms in persons who reside or work in buildings with UV light air cleansing systems.
Tests conducted by Ultraviolet Lamp Manufactures revealed the SafeGuard UV Cleanser's High Output Germicidal Light produces over 1025 microwatts @ 1 foot.
To compute time needed to sterilize micro-organisms in the following chart at 1 foot distance from the light, simply divide the dosage required by 1025.
Example: for 90% kill factor of Bacillus subtilis spores:11,600 divided by 1025 = 11.25 seconds.
| Organisms: |
Energy dosage of Ultraviolet radiation in µW sec/cm2 needed for kill factor |
|
Bacteria |
90 % |
100 % |
|
Bacillus anthracis - Anthrax |
4,520 |
8,700 |
|
Bacillus anthracis spores - Anthrax spores |
24,320 |
46,200 |
|
Bacillus magaterium sp. (spores) |
2,730 |
5,200 |
|
Bacillus magaterium sp. (veg.) |
1,300 |
2,500 |
|
Bacillus paratyphusus |
3,200 |
6,100 |
|
Bacillus subtilis spores |
11,600 |
22,000 |
|
Bacillus subtilis |
5,800 |
11,000 |
|
Clostridium tetani |
13,000 |
22,000 |
|
Corynebacterium diphtheriae |
3,370 |
6,510 |
|
Ebertelia typhosa |
2,140 |
4,100 |
|
Escherichia coli |
3,000 |
6,600 |
|
Leptospiracanicola - infectious Jaundice |
3,150 |
6,000 |
|
Microccocus candidus |
6,050 |
12,300 |
|
Microccocus sphaeroides |
1,000 |
15,400 |
|
Mycobacterium tuberculosis |
6,200 |
10,000 |
|
Neisseria catarrhalis |
4,400 |
8,500 |
|
Phytomonas tumefaciens |
4,400 |
8,000 |
|
Proteus vulgaris |
3,000 |
6,600 |
|
Pseudomonas aeruginosa |
5,500 |
10,500 |
|
Pseudomonas fluorescens |
3,500 |
6,600 |
|
Salmonella enteritidis |
4,000 |
7,600 |
|
Salmonela paratyphi - Enteric fever |
3,200 |
6,100 |
|
Salmonella typhosa - Typhoid fever |
2,150 |
4,100 |
|
Salmonella typhimurium |
8,000 |
15,200 |
|
Sarcina lutea |
19,700 |
26,400 |
|
Serratia marcescens |
2,420 |
6,160 |
|
Shigella dyseteriae - Dysentery |
2,200 |
4,200 |
|
Shigella flexneri - Dysentery |
1,700 |
3,400 |
|
Shigella paradysenteriae |
1,680 |
3,400 |
|
Spirillum rubrum |
4,400 |
6,160 |
|
Staphylococcus albus |
1,840 |
5,720 |
|
Staphylococcus aerius |
2,600 |
6,600 |
|
Staphylococcus hemolyticus |
2,160 |
5,500 |
|
Staphylococcus lactis |
6,150 |
8,800 |
|
Streptococcus viridans |
2,000 |
3,800 |
|
Vibrio comma - Cholera |
3,375 |
6,500 |
|
Molds |
90 % |
100 % |
|
Aspergillius flavus |
60,000 |
99,000 |
|
Aspergillius glaucus |
44,000 |
88,000 |
|
Aspergillius niger |
132,000 |
330,000 |
|
Mucor racemosus A |
17,000 |
35,200 |
|
Mucor racemosus B |
17,000 |
35,200 |
|
Oospora lactis |
5,000 |
11,000 |
|
Penicillium expansum |
13,000 |
22,000 |
|
Penicillium roqueforti |
13,000 |
26,400 |
|
Penicillium digitatum |
44,000 |
88,000 |
|
Rhisopus nigricans |
111,000 |
220,000 |
|
Protozoa |
90 % |
100 % |
|
Chlorella Vulgaris |
13,000 |
22,000 |
|
Nematode Eggs |
4,000 |
92,000 |
|
Paramecium |
11,000 |
20,000 |
|
Virus |
90 % |
100 % |
|
Bacteriopfage - E. Coli |
2,600 |
6,600 |
|
Infectious Hepatitis |
5,800 |
8,000 |
|
Influenza |
3,400 |
6,600 |
|
Poliovirus - Poliomyelitis |
3,150 |
6,600 |
|
Tobacco mosaic |
240,000 |
440,000 |
|
Yeast |
90 % |
100 % |
|
Brewers yeast |
3,300 |
6,600 |
|
Common yeast cake |
6,000 |
13,200 |
|
Saccharomyces carevisiae |
6,000 |
13,200 |
|
Saccharomyces ellipsoideus |
6,000 |
13,200 |
|
Saccharomyces spores |
8,000 |
17,000 |