UV Irradiation Dosage Table
Please note that many variables take place in a real world environment
that make actual calculating of the UV dosage very difficult (air flow, humidity, distance of
micro organism to the UV light and time). However, it is proven that UV
light will kill any DNA-based organism given enough UV dosage and that UV
light breaks down DNA on a cumulative basis. Therefore, as air circulates
through the ductwork of an HVAC system containing an UV light, 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
also. In fact,
micro organisms breed micro organisms if not controlled. The UV light
helps to reduce incidences of inhaled pathogens for
persons who reside or work in indoor environments.
The following are incident energies of germicidal ultraviolet
radiation at 253.7 nanometers necessary to inhibit colony formation in microorganisms
(90%) and for complete destruction:
| UV Tests | |
|
|
 |
|
Organisms: |
Energy dosage of Ultraviolet radiation in µW/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 | 45,000 | 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 | 17,600 |
