Air Filtration Technology Explained
Understanding the type of air filters and air filtration products available on the market can be daunting. At POLAIR, we want to make it easy for you to understand air filtration and your choices. Courtesy of our friends at RGF, the makers of the Reme-HALO, learn more about the different options for air filtration.
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You wouldn’t vacuum your home only once a year. As a homeowner, it is essential to remember that AC filters vacuum your indoor air. Air filters collect dirt, pet dander, dust, and other particles that may be harmful to your health.
Using MERV 8 or 10 filters and changing them every month protects you from breathing in these kinds of nasty particles. With POLAIR’s SmartPM’s, we make it easy to buy your plan and request your appointment online.
Read more below to learn about air filters and air filtration.
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Types of Air Filtration Products
HEPA stands for high-efficiency particulate air filter. HEPA filters utilize a powerful blower to force the air through a very tight membrane to achieve high-efficiency particulate filtration.
They are very efficient in the filtering of air that passes through the filter. They filter to .03 micron.
They require filter changes. The filter can act as a breeding ground for bacteria, mold, and fungus. They do not remove odors, gases, pesticides, viruses, and many bacteria. They reduce airflow due to the tight pores of the filter. They are generally not used in central systems and sold as stand-alone units only.
Fiber or open-cell foam filters rely on the air passing through a matrix of foam cells or fibers of fiberglass, wire, plastic or cloth. Typically, these filters only stop medium to large particulate.
Low cost, low air resistance, installed in central units.
They only filter the air that passes through the filter. The particle build-up can act as a breeding ground for bacteria. They only filter medium to large particulate.
Electrostatic Precipitators have been used by industry for many years to clean up smokestack emission of particulate. They operated by electrically charging a field between metal plates. The air is charged with an electrical charge similar to static electricity. The charged particulates collect and coagulate on a second set of charged plates where they build up and fall to a collection tray.
They are very effective on removing smoke from the air that passes through the filter. They do not reduce airflow as most other filters do. They can be installed in central units or in each room.
They require frequent cleaning. They only filter the air that passes through the filter. The particle build-up can act as a breeding ground for bacteria.
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Negative Ion Generators
Negative ion generators have been used by industry for years to remove particulates from the air and to neutralize the effects of excess positive ions. Negative ions are produced electrically and travel through the air until they attract airborne particulate and coagulate the particulates until they are too heavy to drift and settle to the floor.
They are very effective in removing smoke from the air. They travel throughout the entire room and purge all the air of particulate, not just the air that passes through a filter.
They drop the particulates to the ground. They must be in each room as the ions cannot effectively travel through HVAC ducts.
Ozone is a gas of oxygen ⎯ an oxygen molecule containing three atoms instead of two, like the oxygen we breathe. The extra atom of ozone is known as a loose radical that looks for organics to attach to and thereby oxidize. Ozone is known as a friendly oxidizer due to the fact that it reverts back to oxygen after oxidation occurs.
Ozone is an oxidizing gas that travels throughout the room and oxidizes all organics. Ozone can neutralize odors and gases. Ozone destroys microorganisms and does not reduce airflow. Ozone units can be installed in central units or in each room.
Ozone has no effect on particulate solid particles. Ozone exposure can be very dangerous at high levels.
Ultraviolet (UV) Light
Ultraviolet light rays have been used as a sanitizer by the medical profession for years. Ultraviolet light can also sanitize air that is passed directly in its path with the proper exposure times.
Ultraviolet light can destroy bacteria, fungus, molds and some gases. It does not reduce airflow.
Ultraviolet light has no effect on particulate, needs direct close contact with a calculated exposure time, Ultraviolet light rays must be shielded from human exposure. UV Light has little to no effect on the conditioned space.
An advanced oxidation technology patented by RGF utilizing broad spectrum HE/UV light targeted on a quad metallic target that produces Hydroperoxides that reduce microbes and gases in the conditioned space.
A broad scope of oxidizers makes it extremely effective on a larger number of microbes and gases.
Little effect on airborne particulate.
A unique combination developed and patented by RGF® that uses a Charged Advanced Oxidation Plasma to provide continuous purification with the ability to increase the efficiency of removal of .03 micron particulates with standard media filters up to 73%. Filtration can be increased to 93% with RGF REME+ Grounded Collector.
All the benefits of Photohydroionization with the added benefit of increased efficiency and particulate removal.
Must maintain a Grounded collector or filter.
Below is a chart that illustrates the effectiveness that various industry products, including the Guardian Air and REME in combating indoor air pollutants. As you will see, only the REME provides whole-home coverage for all three types of pollutants.
When considering only Microbials and Gases, besides the REME, no other solution is as effective as the Guardian Air. In independent laboratory tests, the Guardian Air has inactivation rates of over 99% in a matter of hours for the most common and deadly bacteria, viruses, and mold.
Filter Technology Capabilities
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