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Information @ a Glance

  • The HVAC system -
    heating, ventilating, and air conditioning in workplace is all about making heat, distributing it and controlling it.
  • HVAC is sometimes referred to as climate control because it provides heating, cooling, humidity control, filtration, fresh air, building pressure control, and comfort control.
  • There are many types of HVAC systems. These types of HVAC systems can be classified into broadly three main types of HVAC systems:
    a) Centralized Ducted Air Systems,8 which include Dual Duct systems, Constant or Variable Air Volume Systems.
    b) Centralized Fluid Based Systems,9 which include Fan-coil systems, Hydronic systems, Variable Refrigerant Volume systems (VRV).
    c) Decentralized Systems,10 which include split systems and evaporative coolers.
  • HVAC filters remove airborne
    contaminants and, if filters have low initial pressure drop, the amount of energy to operate the HVAC system is reduced 
  • HVAC filters work by providing a physical barrier between the air intake and the moving parts of the HVAC system. As air is drawn in, particulates are caught by the filter and prevented from entering while the air is allowed to pass through. Some HVAC systems have a filter at the air intake and also at the air exhaust, further preventing any pollutants from being blown back into the interior environment.
  • The filters are available currently
    with Minimum Efficiency Reporting Value (MERV) ratings
    of 14 (>90%), 15 (>95%) and 16 (>98%).
  • Air cleaners are usually classified by the method employed for removing particles of various sizes from the air. There are three general types of air cleaners on the market: mechanical filters, electronic air cleaners, and ion generators. Hybrid units, using two or more of these removal methods, are also available. Air cleaners may be in-duct units (installed in the central heating and/or air-conditioning system) or stand-alone portable units
  •  Filter efficiency is found by the Minimum Efficiency Reporting Value (MERV), which is a scale from 0 to 20. A higher MERV rating means the filter will remove smaller particles from the airstreams. Pleated media filters with a MERV rating between 6 and 12 should adequately protect the coil and provide indoor air quality benefits.

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