Hurricane system is composed by several air-treatment modules: a pre-filter, a UV-C chamber, a photocatalitic filter and a HEPA filter.
The scope of the test is to verify the efficacy of the entire system in reducting the airborne microbial populations. The test involves to nebulize three microrganism (rapresenting Gram + bacteria, Gram -bacteria and fungi) in the air entering the copy of the device and verifying their reduction in the outgoing air.
In addition, to check the germicidal activity of the UV-C chamber alone, a test was performed by removing the other air-treatment modules and letting the air flow through the copy of the device with only the UV-C light running.
Scheme of the test rig
The copy of Hurricane device by MA-FER Impianti was tested with 3 different microorganisms:
From the results obtained by testing the entire Hurricane system, it has been verified that the copy of MA-FER Impianti srl device is able to decrease the microbial airborne populations with reduction higher than 99% for all tested microorganisms.
The test with the only UV-C chamber working, as per ISO 15714:2019 Method of evaluating the UV dose to airborne microorganisms transiting in-duct ultraviolet germicidal irradiation devices, show that the ultraviolet dose emitted by the copy of MA-FER device is able to inactivate the test microorganism (Serratia marcescens), representing microrganism with D90 <25 J/m2. Theoretically it is possible to point out a list of microorganisms which, on the basis of literature data, can be inactivated by the same system, including coronavirus*.
The graph below show some of these microorganism (data are taken from ISO 15714:2019 – Annex C).
The result presented in this page are referred to only the copy of the device tested as received.
*The percentage efficacy on coronavirus is inferred basing on D90 dose tabulated in ISO 15714:2019 Annex C; the virus itself is not being tested.
