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HVAC / HEPA / ULPA

International Filtration News provides ongoing coverage of HVAC/HEPA/ULPA applications and technology. Visit filtnews.com regularly to stay on top of the latest insights, issues and innovations in HVAC/HEPA/ULPA filtration.

Filtration terminology – the rest of the story

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Perspectives & challenges in IAQ – takeaways from AHR Expo

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Simplify your HVAC investment with a total cost of ownership analysis

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HEPA Filtration Efficiency

In our current global marketplace and supply chains, consumers and users require some level of fluency in the terms and standards that define the products they acquire and use. Our filter market is no different. While the design and variety of filters and the standards that govern their performance have expanded over the past several …

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AHR Expo focus on indoor air quality (IAQ)

I made the trip to Orlando in February for the 2020 AHR Expo. I traveled to this event with the objective of determining the level of interest in an INDA (Association of the Nonwoven Fabrics Industry)-sponsored Indoor Air Quality coalition. Walking the show allowed me to meet in person with potential IAQ coalition members from …

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Geopleat filter

Deciding which HVAC filtration solution is the best choice requires a comprehensive understanding of your system needs and the costs associated with HVAC filtration. Simplifying the decision-making process is an attainable goal, but it requires necessary steps. Whether it is the age of a unit, the layout of a facility, the space allotted for filters …

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A World Bank study maintains that air pollution costs the world trillions of dollars a year and contributes to the premature death of millions of people a year around the world. Ambient air pollution remains the fourth leading cause of premature global deaths, causing lung cancer, heart disease and respiratory problems. Air quality problems are …

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Almost 500,000 tons of nonwovens are currently used annually in the production of filters, which corresponds to approximately 10% of current worldwide industrial nonwovens manufactured. Here, the filter market is split into two areas: air and liquid filtration. While in excess of 170,000 tons of nonwovens were manufactured for gas/air filters in 2015, the volume for liquid filters was almost double at around 295,000 tons.

Depending on the specific application, the demands on filters are extremely high. To this end, high-efficiency particulate air filters for clean rooms must, for example, filter < 1µm particles from the air with virtually 100% efficiency. Filters must achieve their separation performance with the lowest possible pressure drop – in other words, filter resistance. Pressure drop is one of the most important quality features of filters: the lower the pressure drop, the more energy efficient the filter of the corresponding filter class is. A good example is vacuum cleaner filters. The class in the case of vacuum cleaners depends on the energy consumption, which is also influenced by the vacuum cleaner filter. If the filter is too dense, the vacuum cleaner draws more electricity and the energy consumption increases.

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