Hvac air filtration the air filter in your heating and air conditioning system is extremely important, but often neglected. Air filters for general ventilation eurovent association. Portable air cleaners and hvac filters can reduce indoor air pollution. Layered fiberglass fibers are laid over each other to form the filter. Air filters are devices that remove particles, such as dust and dirt, form the air. Hepa filters are composed of a mat of randomly arranged fibres. Effects of carbon filtration type o n filter efficiency and efficacy.
Crosssection of typical air filter, with iso symbols. Fiberglass filters are the most common type of hvac air filter available. Hepa type filters have been around for years, and as the name suggests, they do a great job of filtering particles. Different types of air filters hepa, ionic, uv, carbon. No other air filter manufacturer has a broader line of products to meet the demanding needs of an increasingly complex market. The three types of air filters facilities management insights. By government standards, a hepa air filter must remove 99. Highly efficient, flexible, and recyclable air filters using polyimide. Understanding the 5 types of air cleaners and purifiers. There are many types of air filters on the market, but the most cost effective isnt always the cheapest. According to the standards laid down, a hepa filter. Largersized aerosols can be collected on lowerefficiency filters, but the effective removal of a smallsized aerosol requires a higherefficiency filter.
These filters rely on fiberglass to filter out the air before it goes into your hvac system. Ashrae position document on filtration and air cleaning 1 abstract filtration and air cleaning are used to improve indoor air quality and occasionally to enable a reduction in rates of outdoor air ventilation. The fibers are typically composed of fiberglass and possess diameters between 0. The type of filter you install in your furnace will affect the furnaces performance and lifespan. There are a few different options to choose from when it comes to selecting a furnace air filter for your system. The openings in this type of filter have to be very small to filter efficiently, and thus, these filters have a high pressure drop. There are many types of rpe, but these can be broadly categorised into two types, 1 air filtering and 2 air supplying equipment.
Figure 71 shows a simple air filter and the iso symbols that represent it. Several types of air filters are common in commercial hvac systems. Different types of hvac filters explained conditioned air. The furnace filter you choose has a significant impact on your health as well as the health of your hvac system. They rely on air straining and inertial impingement to capture contaminant particles. But, if you decide to clean your air filters remember, there are several risks involved with the cleaning of air filters. A hepa filter is a type of air filter that satisfies certain standards of efficiency such as those set by the united states department of energy doe. Learn about iaq, air filtration, ashrae, fiberglass filter, polyester filter, pleated filter, washable air filter, hepa filter and related trends for building. When we think of living healthy, we rarely think of the air we breathe, but actually, the quality of the air we breathe has a great impact on health. Most filters clean the air and separate condensed water from it before the air enters the circuit. However, because application requirements vary there are several types. Air filtering equipment equipment which takes in air from the work area and filters or cleans it before it is inhaled.
Key factors affecting its functions are fiber diameter, filter thickness, and face velocity. In most homes or apartments, you will find flat fiberglass filters. In our tests, we found that the thicker the filter, the better it works and the longer the. When we think of living healthy, we rarely think of the air we breathe, but actually, the quality of the air. Effects of carbon filtration type on filter efficiency and. This position document addresses the health consequences of filtration and air.
Pdf effects of air filter type and condition on performance and. Ionic, hepa, carbon, and uv light air filters are effective methods for filtering air in various applications. The engine air filter in your car is there to clean the air that enters the engine for combustion. It is important to know that any type of cleaning is only as good as the care and handling. Filter general properties class effect applications. This type of filter is one of the most common filters. Air filter selection chart typical particle arrestance efficiency for various grades of filter media particulate diameter in microns 1 micron 1 of a mm 10 micron 10 of a mm and is the smallest particle able to been seen by the human eye. To be classified as hepa filters they must remove at least 99. Pdf urbanization increased population density in cities and. The good working condition of each filter depends on the material. High efficiency particulate air hepa filters are in this category.
Mechanical air filters remove particles by capturing them on filter materials. These units usually require little attention if the compressor has an air. Dust, pollen, pet dander, and other pollutants reduce your indoor air quality, decrease your heating and cooling systems efficiency, and lead to mechanical failure. Ceo, air science, llc march 2014 abstract activated carbon is used in a wide variety.
Panel filters extended surface filters panel filters are made using coarse, highly porous fibers coated with a viscous, sticky substance to increase particle impingement and detainment on the fibers. Layered fiberglass fibers are laid over each other to form the filter media and typically are reinforced with a metal grating that supports the fiberglass to prevent failure and collapse. Most air filters are 1 inch thick, but some systems can accommodate filters 2 to 5 inches thick. The air passes through the filter, either through your hvac system or independently through a freestanding model. California environmental protection agency air cleaning devices for the home, frequently asked questions pdf. Figure 1 compares different types of air contamination with the respective particle size ranges. The kapton air filter captures pm using microsized thruholes and the strong. Air purifiers with pleated filters use fans to force air through a dense web of fine fibers that traps particles. In order to help ensure proper filtration, you need to think about several things. Hepa filter h class na type c h11 95% at mpps particle size bigger than 0. Many people only look at initial price as a factor when purchasing an air filter, but the long term expense of using an air filter. Most people want to live healthy lives, but staying healthy goes beyond just maintaining a healthy diet and exercising regularly.
Specification for filters, air hvac this specification is released for procurement purposes until revised or rescinded. Scope this specification covers various types and sizes of replaceable air filters for use in heating, ventilating and air conditioning systems. The scale shows that the various contaminants cover a size range of. Applications that require high air quality or are air sensitive often use air filters. Efficiency 2merv rating filter type airguard product selection 60 80% less than 20% merv 1 4 disposable panel filters permanent metal filters. Guidance for filtration and aircleaning systems to. Ashrae position document on filtration and air cleaning. High efficiency particulate air hepa, originally called highefficiency particulate absorber but also sometimes called highefficiency particulate arresting or highefficiency particulate arrestance, is a type of air filter. The fkb series is a family of twostage air cleaners for medium dust conditions. Air filters available guidance for their comparison.
Made with heavyduty plastic and nonmetal filters, the air cleaner is lighter, more efficient, and easier to install and replace. Different types of air filters hepa, ionic, uv, carbon when air contaminants are inhaled, the bodys natural defense system is more vulnerable to small particles below 0. The most common type of filter, also known as an air cleaner, is made of foam, fiberglass, cotton, or another particletrapping material. Introduction a particulate air filter is a device composed of fibrous materials which removes solid particulates such as dust, mold, and bacteria from the air. Aside from the different types of furnace filters listed below.
Unlike some other types of filters, this one comes at a very low cost. Filtration and air cleaning systems to protect building environments from airborne chemical, biological, or radiological attacks department of health and human services centers for disease control and prevention national institute for occupational safety and health april 2003. A hepa filter is only as good as its gasketing and framing when installed and because all hepa filters are used in critical applications, inplace hepa filter testing should be mandatory. A series of standards, bs en 1822, high efficiency air filters epa, hepa, and ulpa, describes the factory testing of the filtration properties of air filters, while another series of standard, bs en iso. Air filters of many types and materials of construction have been designed, manufactured, and applied to meet a wide variety of industrial and commercial requirements for clean air e. Its important to know the different types of filters, and which might be most suitable for your. There are two types of filters that are commonly used in air moving devices. Crafted from strands of fiberglass spun together, this type of filter traps large airborne particles, including dust. Central furnace or hvac filters are designed to filter air throughout a home. The three types of air filters facilities management. Air filtration provides the most effective means to control contaminants. A particulate air filter is a device composed of fibrous or porous materials which removes solid. Fiberglass air filters are normally used in both furnace units and air conditioners. High efficiency particulate air, or hepa, filters are a unique type of air purification systems that must remove 99.
567 391 269 1300 606 1338 1562 960 1556 392 1194 1501 206 534 942 72 153 868 589 926 1326 769 1256 349 1415 491 613 565 174 86 164 987 665 121 1300 232 1496 62 1037 478