Frido Technologies

Sanitisation for the spaces where people gather

We make the Frido ProTech 2, a ceiling unit that uses 222nm Far-UVC light to inactivate airborne and surface pathogens, including influenza, coronavirus and norovirus, whilst people are present.

It is certified safe for populated spaces, it runs all day without anyone noticing it, and the science behind it has been proven in peer reviewed studies. It is installed on cruise ships and super yachts, in London restaurants, at Ygia Polyclinic in Cyprus and in offices in the City of London.

Light vs virus

Ordinary UV light kills germs but harms people, so it can only be used in empty rooms and sealed ducts. Light at 222nm is different. It passes straight through a virus or a bacterium, which is less than a thousandth of a millimetre across, but it cannot get through the dead outer layer of your skin or the tear film on your eye. So it works on the germs in the room and not on the people in it.

A 2020 study at Columbia University found that a dose of 1.2 to 1.7 mJ/cm² of 222nm light inactivates 99.9% of airborne coronavirus. At the dose we deliver with people present, that is roughly 90% of airborne virus gone in eight minutes and 99.9% in twenty five. A 2024 study, also from Columbia, put four 222nm ceiling units in a working room and measured a 99.8% drop in airborne norovirus whilst staff carried on with their day. Read how it works and Look at the evidence.

Safe

222nm light does not reach living skin cells and less than 0.001% of it gets through the tear layer of the eye. Studies on skin, eyes and long term exposure, including a year of daily exposure for office workers, found no harm. The ProTech 2 keeps the dose in the room inside the published exposure limits using its own sensors. More on safety.

Normality

Because it is safe to be under, the ProTech 2 can run in a full restaurant, a packed bar, a gym, a lift lobby or a crew mess. No evacuating the room, no chemicals, no downtime. The pathogen load in the air and on the surfaces is being brought down continuously, between cleans and whilst people are eating, talking and breathing.

Where it can be used

  • Cruise ships: restaurants, buffets, bars, theatres, gyms, spas, medical centres and crew areas.

  • Restaurants and bars.

  • Clinics, dental practices and care homes.

  • Offices and meeting rooms.

  • Defence installations

  • Anywhere that people congregate…

The unit

Ceiling mounted, 22cm across, 20W, with a Ushio Care222 lamp, motion and LiDAR sensors and a small pulsing light so you can see it is on. One unit covers about 20 square metres under a 3m ceiling. The Frido ProTech 2.