![]() However, using a filter rating that is too high for your HVAC system may cause damage. ![]() MERV ratings range from 1 (least efficient) to 16 (extremely efficient) Air filters with lower MERV ratings need to be replaced more frequently.Ĭommon sense would suggest that you would choose an air filter with a higher MERV rating to ensure the best air quality. Every HVAC air filter has a MERV rating, which measures how efficiently a filter captures pollutants that pass through your HVAC system tells you how well the filter captures and holds dirt and dust of a specified size range. The effectiveness of a HVAC air filter is measured in MERV ratings (Minimum Efficiency Rating Value). The web must be sufficiently dense to force any particle attempting to pass through it to follow a zigzag course, the particles, which hit the fibres on their passage through the filter medium, are caught and held by the fibres. An air filter consists of a web of fine fibres. Some air cleaning devices are designed to be installed in the ductwork of a home’s central heating, ventilating, and air-conditioning (HVAC) system to clean the air in the whole house.Īir filters remove particles from the air stream as these particles come into contact with the surface of fibres in the filter media and adhere to the fibres. Air cleaning devices are intended to remove pollutants from indoor air. If these measures are insufficient, an air cleaning device may be useful. The ventilation method may, however, be limited by weather conditions or undesirable levels of contaminants contained in outdoor air. Usually the best way to address this risk is to control or eliminate the sources of pollutants, and to ventilate a home with clean outdoor air. Indoor air pollution is among the top five environmental health risks. ![]() Indoor air pollutants are unwanted, sometimes harmful materials in the air.
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