HEPA and ULPA filters are designed to trap very small contaminating particles from an air stream by forcing air through a fine mesh. Typically composed of glass fiber arranged randomly forming a dense mesh, the diameters of the fibers are between. A combination of three main methods is used to trap particles: interception, inertial impact and diffusion. And the final similarity between the two filters will not eliminate gases or odors.
ULPA filters trap more and smaller particles than HEPA filters. ULPA filters are 99.999% efficient at removing submicron particles 0.12 microns in diameter or greater, while HEPA filters are 99.97% efficient at removing particles 0.3 microns in diameter or larger. HEPA filters can be combined with pre-filters to trap larger particles before they come into contact with the main filter. ULPA is an acronym for Ultra-Low Penetration Air (Filter).
A ULPA filter can remove at least 99.999% of dust, pollen, mold, bacteria and any airborne particles with a minimum particle penetration size of 120 nanometers (0.12 µm, ultrafine particles) from the air. A ULPA filter can remove (largely, not 100%): oil smoke, tobacco smoke, rosin smoke, smog, insecticide dust. In general, ULPA filters are made of hook-spun fibers wound in a paper-like material that is then formed into panels. The panels are usually pleated to increase the volume of the filter surface without the need for a larger frame. Porosity is one of the most important considerations with regard to fiber selection for a ULPA filter, since its primary purpose is to remove as many particles as possible. ULPA Airflow Capacity & HEPA air filter media are made of submicron glass fibers formed on high density paper.
They can be built for any special application and are made of corrugated aluminum spacers that allow maximum use of the media with minimal strength. If required, these HEPA% 26 ULPA filters can be manufactured with a glue bead separator mini pleat. When air passes through a HEPA filter, the friction of the air passing through the borosilicate fibers charges them with static electricity. But the systems that use them are specialized and considerably more powerful than a residential air filter system. These complex HEPA filters exceed the typical MERV rating scale, making them the most efficient and popular choice for many industries. Each high-efficiency filter, pleated in a mini-pleat shape, is available in different heights and melts into the frame and center bridge. The only material difference between a HEPA and ULPA filter is the density of the borosilicate fibers.
Implementing this level of air filtration is crucial, as ULPA filtration has the ability to stop the spread of airborne infectious diseases and toxic agents. While HEPA filters can trap larger particles, the less restrictive media allows more air to be filtered every hour, making HEPA filters ideal for applications where clean air is critical for healthcare centers, cleanrooms, and data centers. Specially designed for use in cleanrooms and precision assembly areas, FILT AIR HEPA and ULPA filters come in a wide range of sizes for many applications. While ULPA filters may have higher efficiency, that doesn't necessarily mean they are superior to HEPA filters. ULPA filters are almost always used for specialized environments, such as cleanrooms, also for good reason. Each filter frame is made of anodized extruded aluminum profile with two angles at each corner for a rigid, straight, high-efficiency filter. All FILT AIR HEPA filters are tested for airflow resistance and penetration of DOP (dioctyl phthalate) smoke with an average particle diameter of 0.3 microns by measuring upstream and downstream concentrations with a laser, achieving 99.99% efficiency with particles 0.3 microns or more in diameter. HEPA and ULPA air filters are designed to filter and trap small particles of air from the air stream by forcing air through the microfiber glass filter media.
