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Charlotte, NC 28208

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Let's Clear the Air About Our Needlepoint Bipolar Ionization Technology

GPS is proud to be the world’s leading provider of advanced needlepoint bipolar ionization (NPBI™) technology, which has strengthened how schools, offices, healthcare facilities and thousands of sensitive, high-use locations improve indoor air quality. As a complement to air filtration and modern HVAC installations, GPS cutting-edge systems can create an environment that enables the reduction of certain harmful viruses and bacteria without introducing harmful levels of ozone or measured volatile organic compounds (VOCs).

GPS Technology Is Backed by Testing from Third-party Laboratories

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Inactivating SARS-CoV-2

In new tests conducted by third-party laboratory Innovative Bioanalysis, GPS NPBI technology demonstrated the in-air inactivation of up to 98.3% of SARS-CoV-2 in 60 minutes. Additional tests* demonstrated GPS products to be similarly effective against SARS-CoV-2 on surfaces.

View 2021 SARS-CoV-2 Test Result Summary*

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No harmful byproducts

Recent testing by Intertek, an independent industry leader for over 130 years, confirmed that GPS NPBI technology did not increase measured VOCs.

View Intertek No-Byproducts Report Summary

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GPS Brand Has Earned UL's Stringent Zero Emissions Certifications for All Products

All GPS brand products comply with UL 2998 “zero ozone” certification. This certification meets the UL qualification standard for ozone-free emissions and is compliant with American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) guidance. In addition, NPBI is the only technology provider in its category to pass the RTCA DO-160 standard for aircraft.

Visit the UL SPOT website to view our certified products.

The Science of Cleaner Air

Important Considerations When Evaluating Third-Party Studies on Bipolar Ionization

At GPS, we’re 100% committed to science, which is why we encourage and appreciate the scientific industry’s testing of our NPBI clean air technology. We believe in transparency and wanted to address a recent report¹ regarding GPS NPBI technology. Some of the report methodology raised concerns on whether the researchers accurately replicated real-world applications of the products and ion delivery systems (HVAC), as well as whether the correct standards were applied. Our extraordinary dedication to clean air means we hold our research to the highest standards. Here are some of the questions we ask when evaluating research:

In this test, the chamber in the description appears to be an airtight refrigeration enclosure. It is impossible to know from the test description if the chamber was vented. In a real-world environment, air can flow in and out of a space. But if the test chamber did not have an exhaust vent, the ions produced by the NPBI technology would not have flowed into the chamber effectively, as the chamber would have become pressurized after a few seconds, limiting airflow. With proper airflow, the NPBI device produces a constant flow of ions into the space at a level that, as documented by independent testing, reduces particles, including certain viruses and bacteria, as well as volatile organic compounds (VOCs).

In this case, they did not. Ionization is proven to be most effective, especially for particles, when the conditioned air is pushed at a certain velocity and then recirculated back to the ionization source multiple times to pass through the air filter, as is typical in most HVAC installations. This facilitates proper ion production and the agglomeration process (the process of increasing the size of particles as they bond to the ions), which aids HVAC filters in capturing the now larger particles. In this test, the air did not reach the recommended velocity and only passed through a filter once. As tested at independent laboratory Blue Heaven Technologies, GPS has demonstrated that ionization in addition to a MERV 8 filter is as efficient as a MERV 13 filter without ionization, leading to efficient and cost-effective air quality improvement for over 250,000 locations around the world. In fact, this technology is used in many clean rooms to improve even HEPA-filter particle capture.

The ionizer used in this test was set to increase the amount of ions inside the test chamber to a level that was lower than the recommended guidance for achieving effective results. In addition, the researchers only measured the level of ions inside the test chamber prior to testing, so there is no way to know what levels of ions were maintained throughout the test.

In this research, each test on the NPBI technology was conducted only once. The long-established standards for proper experimental design call for tests to be performed at least three times to validate results.

GPS systems should be operated 24 hours, seven days per week to allow the generated ions to agglomerate particles and return them to the filter. The ionizer used in the research was turned on only 3 1/2 hours prior to testing.

In this case, the report appears to show an increase in some VOCs that the authors intimate is a result of ionization. However, the report goes on to state, “We were unable to discern the relative contribution of the ionizer-initiated chemistry vs. indoor sources,” raising serious questions about the original source of the VOCs and whether they came from the ionization device at all.

¹Yicheng Zeng et al., “Evaluating a Commercially Available in-Duct Bipolar Ionization Device for Pollutant Removal and Potential Byproduct Formation,” Building and Environment 195 (2021),

GPS at Work

GPS Air-Cleaning Technology Is Used in Thousands of Locations

GPS technology is installed and used to help clean the air in more than 250,000 locations around the world. These include high-traffic environments such as schools and universities, healthcare facilities, airports, banks, professional sports arenas and stadiums, office buildings and research facilities, many of which test their indoor air quality on a regular basis to ensure compliance with strict standards.

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*Global Plasma Solutions’ (GPS) technology is used in a wide range of applications across diverse environmental conditions. Because locations will vary with respect to characteristics like temperature, humidity, and air velocity, entities should evaluate their individual conditions to assess the potential benefits of this technology. The actual performance of the product can only be judged when all necessary operating data are available. This product was tested in a 20 foot wide by 8 foot high by 8 foot deep chamber with the temperature at 72 degrees and the relative humidity at 47%, where the technology was used with a custom HVAC unit designed to mimic units typically used in commercial applications. Fans in each corner of the chamber were used to disperse the ions throughout the chamber. The technology may perform differently where the conditioned air is not pushed at the velocity recommended by GPS or where the area in the room or building does not provide suitable air flow. Suitable air flow is critical as ions can only travel to where the air pushes them; they are not able to distribute themselves in a space on their own. Significant variations in temperature of the space can also affect performance. Testing the reduction rate of SARS-Cov-2 and any other virus or bacteria, with the GPS NPBI product is an evolving process and additional testing is scheduled in the future. GPS NPBI products are not marketed as, nor cleared for approval by the FDA as a medical device. The use of this technology is not intended to take the place of reasonable precautions to prevent the transmission of disease. It is important to comply with all applicable public health laws and guidelines issued by federal, state, and local governments and health authorities as well as official guidance published by the Centers for Disease Control and Prevention (CDC), including but not limited to social distancing, hand hygiene, cough etiquette, and the use of face masks.