HVAC Filters

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HVAC filters are the filters used in the HVAC systems to remove dust or particles from air stream. They are used for filtering low levels of dust, typically in the air conditioning and ventilation industry. The HVAC filters are made of highly porous beds of resin-bonded glass or plastic fibers with their diameters ranging from 1 to 40 micrometers (µm). The main function of fibers are to collect airborne dust. The typical area of use of the HVAC filters is in the industrial or domestic heating ventilation or air conditioning system.

Types of HVAC Filters
The HVAC filters are classified on the basis of the materials used as the filtering medium. On that basis there are two main types of HVAC filters, which are largely used.

• Fiberglass Filter: The fiberglass filter is typically manufactured using heavy cardboard frame with layered fiberglass reinforced with a metal mesh, which is provided for support from collapse. These filters are used in most HVAC filtration applications.
   
• Polyester Filter: Polyester have higher resistance and dust trapping capabilities than the most fiberglass filters. They are efficient than the fiberglass filters.

What is HVAC?
HVAC stands for Heating, Ventilation, and Air-Conditioning, the three most closely related fundamental functions found in homes, offices, and other building structures. It is sometimes also referred to as "climate control". The HVAC systems are important in the design of medium and large industrial and office buildings, and in marine environments such as aquariums, where humidity and temperature are needed to be closely regulated while maintaining safe and healthy conditions within.

Use of HVAC
The main use of HVAC system is to regulate humidity, room temperature, and air flow and ensure that these elements remain within their satisfactory ranges. The effective control of such factors helps to minimize the health-related hazards. A high humid atmosphere is obstacle in regulating the body temperature because it prevents the evaporation of sweat. It may also lead to decrease in physical strength, which can cause fatigue. Finally an unhealthy surrounding can affect people's thinking abilities. It also increases the risk of hypothermia, heat stroke, and hyperpyrexia. They are disposable items and widely used for air cleaning in mechanical ventilation systems.

Three Functions of HVAC
HVAC is all about heating, ventilation, and air-conditioning. These are the three function. Which these systems are required to efficiently, effectively and economically.

• Heating: During cold weather, heating is significant in maintaining adequate room temperature. The two classifications of heating are: local and central. Central heating system is more commonly used because it is inexpensive. The heating system consists of furnace or boiler, heat pump, and radiator.
• Ventilation: Ventilation is concerned with air movement in and out of the room. There are different types of ventilation however they all function similarly. It ensures exhaling of carbon dioxide and inhaling of oxygen, so that people get fresh air. The stagnant air is responsible for the growth of bacteria and fungi such as molds because of high humidity. Insufficient ventilation may lead to spreading of sickness and allergies. So it is essential to maintain an efficient ventilation system.
• Air Conditioning: It controls heating as well as ventilation. They come in different sizes. Most of the air conditioners have large air ducts, so it is good to check out the building first to see if they can be installed. The air ducts should be properly cleaned regularly so that the pathogens mayn't thrive in dirty air ducts

Applications of HVAC Filters
HVAC filters are used in a number of industries. Some important of them are:

• Pharmaceutical Industry
• Chemical Industry
• Cement Industry
• Wood Industry
• Food Industry