Running continuously at
What continuous means, measured
In a real room, airborne bacteria fell by 92% — and stayed down for as long as the lamps ran.
A 32 m³ test room, 4.26 × 3.35 × 2.26 m, ventilated at 3 air changes an hour. Staphylococcus aureus nebulised into it continuously. Five filtered krypton-chloride lamps in the ceiling at 2.12 m, pointing down.
Viable airborne bacteria after the lamps switch on
% of the level with lamps off
EU limit · ICNIRP 23 mJ/cm²
US limit · ACGIH 478 mJ/cm²
Curve shape modelled from the paper's reported eACH; end-points as published.
92%
fewer viable airborne bacteria at steady state, inside the EU exposure limit
< 15 min
from switch-on to steady state — then it holds, for as long as the lamps run
35 eACH
equivalent air changes per hour added by the lamps (range 27–46)
11×
the room's own ventilation rate, added by the lamps alone
How much ventilation the light is worth
equivalent air changes per hour
Far-UVC bars span the range reported by the study (one standard deviation); the white tick is the reported mean. The theatre figure of 20 ACH is a typical design specification, not from the study. We design to the EU row. The US rows show what the same lamps do at about 21× the dose — a level that is not available to you in Cyprus or Greece.
Eadie E, Hiwar W, Fletcher L, Tidswell E, O'Mahoney P, Buonanno M, Welch D, Adamson CS, Brenner DJ, Noakes C, Wood K. Far-UVC (222 nm) efficiently inactivates an airborne pathogen in a room-sized chamber. Scientific Reports 12:4373 (2022). doi:10.1038/s41598-022-08462-z
Read before you quote it: the authors deliberately did not name the lamp they used. They describe filtered krypton-chloride excimer lamps — the same lamp type as UV222 — and we cite the study for the wavelength and the room physics, not for our brand.
What is inside every device
Four excimer lamps behind one filter. The filter is the invention.
A krypton-chloride lamp emits mainly at 222 nm, plus a tail above 230 nm that behaves like ordinary UV. The Care222® module carries a hard multilayer filter on quartz that cuts that tail to 0.43% of the in-band output. It is what lets the light run continuously in an occupied room — designed to the EU limit of 23 mJ/cm² over eight hours, and absorbed in the outermost layer of skin and the tear film before it reaches a living cell.
INVENTED
Columbia University
Brenner et al., Center for Radiological Research
LAMP
Ushio Care222®
Exclusive worldwide licensee
DEVICE
UV Medico UV222®
Denmark
INSTALLED
Icarus 222
Cyprus · Greece · UK film
Built for the cleanroom
Three points where contamination gets into a sterile suite. One device at each.
Annex 1 asks for a documented contamination control strategy. These are engineering controls inside it — running during production, not after it.
INSIDE THE ROOM
Cleanroom Downlight
Flush in the ceiling so it does not disturb laminar flow. Continuous air and surface treatment up to Grade A/B, with the operators inside.
BETWEEN GRADES
Pass-Through Box
Instruments and components cross the grade boundary through an interlocked box lit from above and below. Doors lock, the cycle runs, the far door opens.
AT THE DOOR
Step-On
Soles are treated on entry and exit, in the seconds it takes to walk over it. Replaces the sticky mat, and the consumables that go with it.
Our Pass-Through BoxVideo · 0:54 · From the blog
Two lamps above the load, two below it — a game changer for every new pass box.
A pass box treats only what its light can reach. In a conventional hatch the load sits on a solid shelf, so its underside — the face that touched the trolley, the bench, the glove — stays in shadow for the whole cycle.
The Pioneer Dynamic UV222 Pass-Through Box turns the geometry around: two filtered far-UVC modules above the load, two below it, and the load on an open stainless-steel grid. Top and underside are treated in the same cycle, with nobody turning anything over.
Customised dimensions
Built into the wall between two grades, sized to your process.
Airflow + Far-UVC
The chamber air recirculates through activated carbon and HEPA while the lamps work.
Safe transfer
Interlocked doors: the receiving door opens only when the cycle ends.
Tested & Proven by VIANEX S.A., Athens, Greece
Request a cleanroom site study →
Fourteen UV222® products in four families — all products and datasheets →
From the plant floor
GMP-certified pharmaceutical manufacturing, Greece. Two plants, two general managers.
"We are particularly pleased with the quality of the products and the support we received from G.Z. Icarus 222. We would highly recommend them."
Emmanouil Avgerinos
General Manager, VIANEX Plant A
General Manager, VIANEX Plant A
"The successful deployment of this solution was strongly supported by GZ Icarus 222 through comprehensive scientific and technical expertise."
Nikolaos Raptis
General Manager, VIANEX Plant C
General Manager, VIANEX Plant C
Where it belongs
The physics does not care what the room is for. Eventually this is in every room where people share air.
Four sectors where we work today, and the ones we are building towards.
Today
Pharmaceutical cleanrooms
Grade A–D, Annex 1, personnel and material transfer.
Talk to us about your site →Hospitals and clinics
Theatres, endoscopy, wards and waiting rooms — treated while occupied.
Talk to us about your site →Ambulances
A 12–36 V fixture in the cabin, working between patients on every call.
Talk to us about your site →Film and television
Crews working close together, on schedules that cannot slip. UK production.
Talk to us about your site →Next
Schools and universities
Classrooms and lecture halls, all day.
Offices
Open plan, meeting rooms, lifts.
Public transport
Buses, trains, stations, terminals.
Aircraft cabins
Low-voltage, sealed, vibration-tolerant.
Food production
Wash-down IP66 fixtures over the line.
Sport and fitness
Changing rooms, gyms, treatment rooms.
We design it, install it and hand it over running
Request a site study01 · SITE STUDY
Lamp positions and fluence rate modelled in Illuminate from your floor plans, checked against the EU exposure limit for 222 nm.
02 · INSTALLATION
Supervised by Icarus 222, coordinated with your facilities team and, in cleanrooms, with your QA.
03 · COMMISSIONING
Settings locked by the authorised technician, documentation handed over, two-year warranty on UV222® devices.
Built to European rules
UV222® devices carry an EU Declaration of Conformity and are designed to operate within Directive 2006/25/EC and the ICNIRP limits for 222 nm. UV Medico is ISO 9001 and ISO 14001 certified.
Compliance documents →
CE
Arbejds-
tilsynet
tilsynet
ISO 15858
ISO 9001
ISO 14001
ISO 14001
2006/25/EC
ICNIRP