TECHNOLOGY

Visiting our health care practitioners should not be a risky activity.  The air we breathe is filled with pathogens, viruses, spores, and molds. Pura Air™ ensures we eradicate risk at the molecular level by employing UV and medical grade HEPA filtration technology.

The reality is indoor air is trapped, often re-circulated and always full of contaminants. Increasing levels of these contaminants act as triggering mechanisms for a variation of diseases, such as COVID19 and asthma. We are all at risk of contracting and spreading viruses and bacteria, especially in busy public areas such as medical facilities, offices, stores, schools, museums and on public transport.

A source of concern in health-related fields are bio-aerosol clouds that form as a result of medical and dental procedures.  The goal becomes capturing these airborne particulates and not only filtering them out but killing the viruses and other harmful bacteria before they find their way back into the air.  This is where current filtration systems fall short.

Pura Air™ has developed both centralized and standalone medical-grade air purification systems to remediate and protect against all infectious and non-infectious airborne particulates.  The Pura Air ™ patent-pending technology was designed by industry leaders across a variety of sectors, including medical, industrial clean air, mechanical contracting, as well as key research and development support from Signify (Philips Lighting).

With the help of industry leaders in industrial clean air applications, UV-C light, and healthcare mechanics, we determined the current systems on the market have various design and construction flaws that don’t maximize performance.  We created a solution using proven, existing technologies and applied them to a dental and medical setting, eliminating these imperfections.  Let us explain.

Current Limitations in Air Filtration

Building HVAC systems

Building HVAC systems are designed to deliver heating and cooling. They DO NOT “clean the space”. They do not use proper air distribution to minimize “dead zones”, they do not contain a good air change rate, nor do they contain rigorous air purification/filtration systems (i.e.: For Hospitals, Labs, Pharmaceutical Industry, Aerospace)

HVAC systems focus on economics, keeping energy costs to a minimum.

HVAC systems turn over air 2 – 5 times per hour, however they recirculate 80% of the air, spreading airborne particles.

Science laboratory vector
Indoor workers breath 11,000 liters of air/day

Separate or portable air filtration systems

Many of the current systems on the market use the same principles in air filtration – a system of internal fans to pull the air through a series of filters that remove harmful airborne particulates. The air is then circulated back into the room or building.

How effective these systems are depends on numerous factors such as: air flow management, the volume of air being moved through the system, size of the room or facility needing to be filtered, how effective the filtration methods are (HEPA, carbon, ionized,etc.) and to what particulate size removal efficacy. Various combinations and methodologies exist in the portable systems currently in use.

One of the challenges becomes the need to remove these lethal particulates from the air we breathe. These micro particles require more work to be effectively caught and killed (influenza, SARS and Covid-19).

 It is necessary to ask yourself: Is the unit providing enough airflow to account for static pressure losses? Is the method of filtration allowing for killing the smallest of particulates? Is it certified true HEPA filtration being used or an un-tested copycat filter? Are we addressing the specific risk such as source capture of aerosol’s? Length of UVC light exposure? Proper air change per hour and air flow calculations?

Through PURA Air’s own research, we have determined that the existing solutions do not have the technical features to ensure proper protection from harmful particulates.

Our Approach

Based on science and real-world applications, Pura Air ™ follows these guiding principles in our design solutions:

1. Accurate space air exchange rates for purifying both the localized and ambient air, with the clear directive to protect everyone from any airborne viruses being brought into the workplace.

2. A system that exposes all biological material introduced to the space. Because of this, the capture system becomes critical. See our Chief Technology Officers explain the difference between ‘ambient air capture’ and ‘source capture’.

  • Dentistry: To accomplish this, the company has incorporated fume capture “high suction” source capture arms more typically used in laboratory and welding environments, and hood designs (transparent hoods providing shielded protection, while still not limiting visual operation) proven to be effective in those challenging environments.
    • Other Medical/Commercial: No difference, other than no need for high suction arms, if local generation of aerosols is not present within space.

    3. System fans designed with ECM motors speed control feature, provides fan speed manipulation, essential to be able to ramp up fans when filters are loading while ensuring that desired minimum air change rate is maintained.

    4. The centralized system not only captures airborne particulate down to a HEPA filtration level, but it kills any viruses first. To achieve “high standard” indoor air quality, air purification will contain following:

    Filtration At A Glance

    Our units have either 3 or 4 stages of filtration, depending on size of the unit. Both designs stay true to Pura’s scientific and engineered approach to filtration.

    Portables

    N

    UVC Kill Chamber

    N

    MERV 6 carbon impregnated prefilter to capture larger particulate matter ahead of the HEPA filter, while also adding odor absorption through the carbon.

    N

    Medical Grade True HEPA filter (scan tested to 99.99% efficient at 0.3 micron).

    Air Filtration Infographic

    Centralized/Stand Alone

    N

    UVC Kill Chamber

    N

    Carbon Pre-filter

    N

    MERV 8 filter impregnated prefilter to capture larger particulate matter ahead of the HEPA filter, while also adding odor absorption through the carbon.

    N

    Medical Grade True HEPA filter (scan tested to 99.99% efficient at 0.3 micron).

    Air Filtration Infographic
    • UV Filtration Chamber

        UV-C lighting has the power to disinfect air, surfaces and water. All bacteria and viruses tested to date respond to UV-C radiation. Signify has been at the forefront of UV technology for many years and has a proven track record of developing innovative UV-C products and applications.

        This stage of the system is used for sterilizing up to 99.9% of airborne bio-contaminants in a single pass.
        Learn about UV Technology from Signify here

      HOW OUR SYSTEMS WORK

      Bigger is Better

      Air in motion is challenging to disinfect, mostly because of the speed at which it moves. With, at best milliseconds, neutralizing and irradiating viruses and other biological particulate (molds/spores/fungai etc) via UVC is extremely effective, however, the ‘kill’ chamber size needed to increase, and air speed needed to lower so we could increase UVC exposure to get a higher kill rate. It is because of this that Pura Air systems are large in size. Successful irradiation relies on proper dosage of UVC and the appropriate time of exposure to achieve LOG 1. Infection control is also additive–layering steps improves effectiveness. It is then imperative to pair UVC with scan-tested HEPA to reach the equivalent of 99.99% reduction rate or LOG 4. Our innovation focused on achieving first-pass kill.

      UVC Maximized

      Care has been taken in the design of Pura Air’s ‘kill chamber’ to create the most effective environment conducive to the use of UVC germicidal light.

      Designed with Signify, the UVC kill chamber not only has the appropriate amount of UVC lamps and wattage for proper dosage to be effective, but also uses reflective inner surfaces to destroy viruses within the chamber. Our chamber uses highly reflective material in order to achieve minimum 80% efficient surface reflectance levels. The appropriate number of UVC lamps are equally spaced in order to achieve maximum surface coverage, and a minimum of five reflective surfaces within.

      5. Safety and assurance that the air being returned to the space has been adequately scrubbed. Differential pressure sensors at each filter will provide real time feedback and signal the end user when maintenance is required.

      In Summary

      Pura Air ™ has worked to re-engineer solutions that mitigate the flaws in design, construction and proper science in air filtration by using industrial tested and true practices and applying these solutions to medical and dental uses.  We believe our germicidal ‘kill chamber’ will allow for safer, cleaner air for all who work and visit the Pura Air ™ purified space.