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Our filter looks different because it is different

At trueO2, we know how important air quality in the home, office, or school is and how vital it is to the health and well-being of all involved. We realize that family and employee health is a top priority. Our desire is to help you protect their health by delivering a product that will aid in providing the cleanest, healthiest air possible by removing harmful particulate from the air we breathe.

With over 38 years of experience designing filtration systems for nuclear plants, bioterrorism test facilities, and pharmaceutical plants, we were approached by hospitals to design an air filter that met their high air quality standards.  After development of the filter, it was put to use in many major hospitals with great success.  After years of proven results, trueO2 made the decision to bring this technology to the consumer market. 

Many homes and businesses use traditional, outdated fiberglass or pleated filters.  Fiberglass filters do little to remove contaminants from the air.  The primary function of these filters is to protect the fan and minimize the amount of dust on the heating and cooling coil.  Although better than fiberglass, pleated filter technology is an outdated design that front loads and accumulates particulate quickly.  This results in restricted air flow that causes your HVAC system to work harder, and air to bypass the filter. 

trueO2 filters are designed for today’s more efficient HVAC systems to provide the air quality demanded in today’s world.  The trueO2 filter is made of superior depth loading material that captures contaminants without starving the HVAC system of air flow.  The filter media is a graduated density material that captures larger particles in the front portion of the filter, with the smallest particles captured in the final filter layer.  This design allows the filter to trap up to 98.5% of air contaminants such as pollen, dust, mold, and pet dander, while still allowing the HVAC fan to run at full flow.

Most filters are equipped with a cardboard or plastic frame. This allows a significant amount of air to go unfiltered. In fact, cardboard edge filters allow up to 20% of the air to go unfiltered. Dirty air bypass is one of the leading causes of coil fouling which can cause your system to freeze up and prematurely fail. The trueO2 HVAC filter’s unique design eliminates the risk of unfiltered air bypass around the filter and the filter rack. We utilize a selvedge edge to provide self-gasketing which forces 100% of the air to pass through our superior filter media. 

All trueO2 filters are treated with Aegis® Microbe Shield.  This anti-microbial modifies treated surfaces by creating a shield that disables microbes including, but not limited to, bacteria, fungi, and mold.  The shield is a long chain carbon molecule with a positively charged nitrogen nucleus.  The positive charge attracts the negatively charged microbe, pulling it to the nucleus.  As it makes contact with the nucleus, the microbe membrane is punctured, rendering the microbe harmless.  Because this is an inert coating, the shield remains effective for up to 24 months – far exceeding the life of the filter.



HVAC systems are designed to heat and cool the air. Over time manufacturers realized that the efficiency of the systems was adversely affected because the coils were being coated with debris. This resulted in customers installing cheap paper and fiberglass filters to prevent the coil from becoming coated and less efficient.  With the advent of central heating and cooling systems with ductwork, building engineers installed a filter at the inlet to assist in keeping the ductwork clean and free of debris.  Later, filter manufacturers decided to make more efficient filters to clean the air and keep the system clean. Those filters were provided with an American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) Arrestance number that measured the ability of an air filtration device to remove synthetic dust of typical contaminants from the air. ASHRAE then invented the Minimum Efficiency Reporting Value (MERV) system to help consumers and HVAC technicians determine the actual efficiency rating at different particle sizes. It is a common misconception that a higher MERV rating is always better, however it must be taken into consideration the effect the higher MERV number has on the flow of the HVAC unit.

Our filter was designed specifically for today’s HVAC systems. The particulate size a trueO2 filter collects protects the coils and cleans the air while maintaining a very low initial and final differential pressure- while lasting much longer than other filters. 

 Barometric Pressure (In. Hg.) 29.74 
 Test Air Temp (degrees F)  69
 Relative Humidity (%)  36
 Airflow Rate (CFM)  1180
 Nominal Face Velocity (fpm)  295
 Initial Resistance (in WG)  0.23
 Final Resistance (in WG)  1.00
 Dust Fed (gms) to Final Resistance  176
 E1 (%) Composite Minimum Avg Efficiency 0.30 – 1.0 um  5
 E2 (%) Composite Minimum Avg Efficiency 1.0 – 3.0 um  48
 E3 (%) Composite Minimum Avg Efficiency 3.0 – 10.0 um  84

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