Award-winning classroom air purifier with technology backed by SAGE

Rensair is a specialist in portable, hospital-grade air purifiers and an established supplier to schools, as well as the NHS. Through clean air, our role is to combat disease, reduce illness and absenteeism, and enhance learning.

Our patented technology, which combines H13 HEPA filtration with germicidal UVC light, destroys 99.9% of airborne viruses, including COVID-19. It is independently validated by scientific research laboratories and meets all the standards recommended by the UK Scientific Advisory Group for Emergencies (SAGE) committee.

Rensair has been included in Newsweek’s list of Best Infection Prevention Products 2021.

Supplementary resources

Video case studies:

ITV report on Lytchett Minster School
Case study on King’s College School Wimbledon


Demystifying air purification for the education sector

Indoor air quality is critical for education environments

Covid-19 presents a significant problem for the education sector. The WHO asserts that the chief threat of transmission is airborne. In crowded indoor spaces, like in schools, that threat is amplified, particularly when students are in the same room together for an extended period of time or when enhanced aerosol generation is likely, for example through singing, projected speech and aerobic activity.

However, the scale of the problem is not matched by unlimited budgets. Many school and university buildings are magnificent in terms of architecture, yet chronically under-ventilated. Others are listed, demanding bespoke and costly retrofits. Competing priorities, such as structural repairs, may make a complete overhaul of ventilation systems an impossibility.

Portable air purifier for classroom applications

Many schools are structurally under-ventilated and highly unlikely to achieve the  World Health Organization’s recommended clean air delivery rate of 10 litres per second per person.

Fortunately, HVAC systems are not the only solution. Portable air purifiers can do an effective job, either enhancing existing ventilation systems or working in isolation to bridge the gap..

They must be high performing, hospital-grade air purifiers with a powerful fan to ensure adequate air circulation, HEPA air filtration to trap particles and UVC light to destroy the harmful ones. Residential air purifiers will not deliver the same results, despite over-inflated marketing claims.

The investment is just a fraction of what it would cost for an in-built ventilation system, with no disruption for installation. Through air purification, further savings can be made by reducing energy consumption for heating or cooling fresh air intake.

The role of CO2 monitors

The government is focusing on CO2 monitors to help track the evolving risk of Covid-19 transmission in indoor spaces such as schools and universities. Most guidance - such as that from the UK HSE -  advises that ventilation needs to be addressed when CO2 levels exceed 1,500 parts per million (ppm) and the HSE’s long-term exposure limit (8-hr reference period) recommendation is 5,000ppm.

However, a CO2 sensor is the equivalent of the canary in a coal mine.  It will warn when there is inadequate indoor air quality, yet it stops short of recommending any practical solution once a ventilation deficiency has been identified. In the absence of ample ventilation, air purification can be a practical and effective solution, as recommended by the WHO, SAGE, CIBSE, CDC and other authorities.

Ensuring safety in addition to health

Unlike other technologies, there are no harmful by-products. Rensair is perfectly safe.

Rensair’s UVC lamp is 254nm +/- 1nm,  the optimal wavelength for destroying viruses without creating any ozone. The lamp is also totally enclosed and therefore 100% safe and can be used in occupied rooms. It destroys all virus particles on the HEPA filter, rendering it safe for maintenance.

The unit is robust, with a metal casing that prevents children from tampering with it or knocking it over. It is CE, ROHS and ETL certified.

Clean air means enhanced learning

A major new study from Harvard University shows that there is a direct relationship between the amount of fine particulate matter in the air and how people perform in mental tests. The more polluted the air, the worse people perform.

  • By sustaining 20% lower air pollution levels in the classroom, the development of a child’s working memory can improve by 6%. (Source: Philips Foundation and the University of Manchester).
  • Better indoor air quality boosts academic performance - maths and reading scores go up, and pupils are measurably more attentive in class. (Source: The Economist).