“Practices are informed that a reduced figure of 20 minutes of fallow time is feasible if they can achieve 10-12 air changes per hour (ACH) in a single room using ventilation systems”
September 3rd – The BDA England: New Standard Operating Procedure published with update on fallow time​

If you were just to consider Aura Air on ACH alone, each Aura Air unit at full power filters 14.6m2 (35m3) of air, an ACH of 10 times per hour – that’s a CADR of 206CFM (350m3/hour) – similar in power to many much larger, floor standing units, but at typically half the price.

Aura Air is the first, all in one, Air Filtration, Disinfection and Monitoring product that has successfully completely Clinical Trials specifically related to its effectiveness against the COVID-19 Coronavirus. The same Hospital that performed the tests, voted one of top 10 Clinical Hospitals in the world by Newsweek, has been using Aura Air in its COVID-19 wards and staff rooms since the Pandemic started.

Aura Air not only Monitors the Air to alert Staff of high particulate Levels, but when it extracts these droplets out of the air, it performs a unique triple attack on the virus – UV-C light, a patented Copper impregnated HEPA Filter and lastly, the patented Sterionizer, which sends positive and negative ions into the air, breaking down the protein structure of viruses and bacteria, rendering them harmless.​

Why aura air?


Locating the unit very near the source of the AGP (typically directly above the patient/dentist) ensures the most effective and efficient removal of airborne droplets and the destruction of viruses, AS THEY ARE EMITTED. 

For this reason, the time to disinfect the room after the procedure should be able to be substantially reduced. Sadly this logical observation has yet to be considered or analysed by the BDA. It appears currently to be solely focused on ACH (air circulations per hour) to reduce fallow times, despite considerable past research (see the next section) on the criticality of Air Filter positioning.


Source “The Role of ACH in possible transmission of airborne infections”

​ “The positioning of an air cleaner in the dental clinic is a particularly important consideration for controlling droplet/aerosol particle dispersion. combining the placement of the air cleaner near the droplet/aerosol particle source and the suitable relative position of the air cleaner, source and dental health care worker is a particularly effective method for reducing exposure to droplets/aerosol particles emitted from a patient’s mouth in a dental clinic.”

If a badly located and powerful Filter is left on during a procedure, then it will probably produce substantial air churn and actually may make matters much worse for particulate distribution (see full Research article link to the left below):


BAPD Return to Practice Position Paper – May 2020
3410 Corona BAPD Policy Document – Appendix 1, Table 2

Li Y, Leung GM, Tang JW et al: Systematic Review:  

​”Recirculating air through the UV radiation unit can be very effective to disinfect the air … equipment within the ventilated space close to the ceiling, where human exposure is minimal … but ceiling mounted units do not exist in dentistry.” 
Yes they do!


​”The results show very large variation of the overall particle removal for different positions of cleaning device. In extreme cases, the effective positioning of a cleaning device can result in a factor of 2.5 change in overall particle removal and, consequently, strongly affect occupant exposure to particles.”


The Aura Air Filter system accurately measures and displays PM2.5 and PM10 particulate and pollutant levels in real-time – on your Smart Phone, Tablet or Computer Display – useful in providing feedback of the level of airborne particles in the room – particularly critical in dentistry.

​The Aura Air Filter system also accurately measures and displays VOC, Humidity, CO and CO2 levels.