EIRVAThree technologies. One continuous layer of clean air.
Most air purifiers lean on a single mechanism — a filter, or a UV lamp, or a catalyst — and leave gaps for whatever that one method can't catch. EIRVA is built differently: the range combines UVC germicidal irradiation, Photocatalytic Oxidation and plasmonic filtration in one ceiling-mounted platform — from single-technology UVC through to the full three-technology Pro+ — so pathogens, VOCs and fine particulates can be addressed by up to three complementary processes running at once, a multi-modal approach that sets EIRVA apart from single-technology purifiers on the market.
Exhaled breath rises. EIRVA is positioned to meet it there.
Every person in a room is warmer than the air around them, and that temperature difference sets up a column of rising air — a thermal plume — that surrounds the body and carries exhaled breath upward with it. Within seconds, that breath collects in a layer near the ceiling, well above head height, before it has a chance to spread sideways across the room.
Most air purifiers wait for that air to reach them
Conventional purifiers are sited at floor or wall height, or work through a building's HVAC — which means the room's air has to move laterally, past other occupants, before it reaches the device or duct to be treated, carrying whatever's in someone's breath across the room to get there. That's dilution: the whole room volume gets mixed and gradually cleaned, but in the meantime people are breathing air that may already carry someone else's exhaled breath. EIRVA is mounted directly overhead instead, intercepting that rising layer of breath at the source, before it has the chance to mix sideways across the room — the same principle behind the displacement ventilation used in operating theatres and cleanrooms, built into a standalone ceiling unit.
Three modes, working together
Air moving through the unit is treated by all three processes — each one covering ground the others don't.
UVC Germicidal Irradiation
Shielded UVC-C modules operate at germicidal wavelengths (200–280nm), damaging the DNA and RNA of airborne bacteria, viruses and mould spores so they can no longer replicate or infect. It's the same principle hospitals have relied on for over a century in surface and water sterilisation, applied continuously to the air moving through the unit.
Targets: bacteria, viruses, mould spores
Photocatalytic Oxidation (PCO)
Inside the unit, a catalyst is activated by UV light, generating hydroxyl radicals and other reactive oxygen species — powerful oxidisers that break volatile organic compounds, odours and any surviving pathogens down into harmless carbon dioxide and water vapour, rather than simply trapping them on a filter.
Targets: VOCs, odours, gaseous pollutants
Plasmonic Filtration
Plasmonic nanoparticles within the catalyst layer resonate with incoming light, concentrating its energy at the catalyst surface. That resonance drives a stronger, faster oxidation reaction than a conventional catalyst achieves alone, and helps capture the fine particulates — dust, aerosols, allergens — that pathogens travel on in the first place.
Targets: fine particulates, aerosols, allergens
Why multi-modal matters
UVC alone is well proven against airborne pathogens, but it does nothing for VOCs or odours. Photocatalytic oxidation breaks down gaseous pollutants but works more slowly against pathogens without UVC behind it. Neither, on its own, does much for the fine particulates that pathogens travel on. Layering all three closes those gaps — each mode picks up where the others leave off, instead of asking one mechanism to do a job it wasn't designed for.
Designed for occupied rooms
All three processes happen inside the shielded unit, so the device can run safely while people are in the room — no need to clear the space, no downtime, no disruption to how the room is actually used.
Annual service, not daily upkeep
There's nothing to dose and nothing to clean day-to-day. What the three-mode system does need is a straightforward annual service, in which the UVC lamp and catalyst cell — the parts that do the actual work — are replaced. UVC lamps and photocatalytic surfaces lose output gradually with continuous use, which is standard across this class of technology, so an annual replacement keeps performance at spec rather than letting it quietly drift down over time.
A proven scientific basis
UVC germicidal irradiation, photocatalytic oxidation and plasmonic-enhanced catalysis are each individually documented in peer-reviewed research and established industrial and healthcare use. EIRVA's contribution is combining all three into one ceiling-mounted unit, engineered for continuous use in occupied UK buildings.