This technical update provides perspective and explanation to the results of independent performance testing conducted on behalf of PuriflOH Limited on its new generation of neutralizer free Air Purifiers. The work was conducted by Co-Labs of Brunswick, Victoria. Co-Labs is a Bio-safety Level 2 Laboratory that has recently installed a 75 cubic meter bio-aerosol testing chamber and is capable of testing various microbial organisms on surface or air using internationally accepted methods and equipment.

Thus far, PuriflOH's approach on air purification has been to provide a single stage technology that can eliminate all air pollutants such as particles, odour, Volatile Organic Compounds (VOCs) and air-borne microbes. PuriflOH, initially through its research partner Somnio Global, and now operating through its own auspices, have continued to develop the Free Radical Generator (FRG)-based air purifiers. The new generation is now more powerful with a higher single-pass kill rate ­ the factor of destruction of microbes between outlet and inlet of an air purifier.

Existing products require 3-6 stages of filtration to achieve the same effectiveness. This is a significant and unique improvement over current air purification solutions. Since 2018, Somnio and PuriflOH have engaged with OEM companies in order for them to integrate versions of the Free Radical Generator (FRG) into existing designs to significantly enhance product performance.

This OEM engagement has lead to useful market feedback and design changes. For example, the high concentration of radicals needed to significantly remove VOCs and other contaminants efficiently has necessitated neutralizer filters, which add to the overall size of the end product and cost as an air purifier. A result of the Covid-19 pandemic has been that market priorities have shifted to highlight microbial decontamination above all else.

This has led to the company focusing its efforts on the Air Conditioner Remediation and Environmental Treatment (ACERT) device as its first commercial product and re- evaluating the design of its air purifiers. Recently, PuriflOH has been actively developing a low-power FRG addition to Air Purifiers, FRG+, that are simple to implement whilst providing significant benefits to the final product. The result of this approach is a new generation of Air Purifiers empowered by the FRG.

This newly designed FRG module has the following performance features: An improvement of at least 150% in the speed and efficacy of air purification over current market leading devices. Safe operation in occupied spaces without the need for neutralizer filters. Only 10W of added power consumption.

Reducing noise levels in existing air purifiers while improving efficacy. Independent testing and results: PuriflOH has concluded its first independent test on this new FRG+ version of an Air Purifier, conducted at Co-Labs Melbourne, which houses the world's largest and Australia's first Bio-aerosol testing chamber. The test was conducted with Staphylococcus epidermidis, a vegetative bacterium that is analogous to MRSA, a common hospital-acquired infection frequently used in testing disinfectant efficacies.

PuriflOH's previous aerosol testing results were obtained from ARE Labs in the USA and performed in a chamber sized 15 cubic metres. The airflow rate of the "Bluemist" device provided for more than 12 air changes per hour in this previously tested chamber. In the test conducted at Co-labs, the chamber volume was 5 times larger (75 m3) and the flow rate allowed for only 5 air changes every hour.

Smaller air changes typically increase the time taken to achieve total disinfection. This air exchange rate of 5 per hour is similar to how ventilation and air purification systems are configured in the real world. Despite the larger chamber size and the lower exchange rate, the new FRG+ device was able to achieve 99% reduction in airborne bacteria in approximately 30 mins, at least 1.5 times faster than a standard HEPA based air purifier acting under the same conditions.

Moreover, ozone levels in the chamber were tested to remain well within acceptable values, allowing the device to be used in occupied spaces. Commercial impact of new design This new format of the FRG has been designed to incorporate a simple manufacturing and installation process that should increase chances of commercial success. The new design also creates new opportunities for PuriflOH and removes existing obstacles as: This design is highly cost effective and significantly upgrades the efficacy of air purifiers.

The design is suitable for businesses, offering a highly effective solution with low operational expenses such as maintenance and power consumption. The FRG is now a retrofit solution to existing air purifiers. The design is easily adaptable to any existing residential or commercial air purifier, thereby making it a very easy OEM solution.

PuriflOH will continue to seek internal and external validation of FRG+ Air Purifiers on a roster of challenge organisms including viruses and fungal/bacterial spores, while driving the development towards improved performance in occupied spaces without the need for neutralizer filters.