Hvac Filters

Written by Norene Anderson
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HVAC filters are made in differing media, types, and sizes. The low end of filters is effective in removing dust and lint from the heating and cooling system. It keeps the coils clean to prevent premature damage to the unit. This level of filter quality does very little to enhance the cleanliness of the indoor air. While it is important to remove elements that increase the pull on the fan, it is equally important to remove contaminants that cause distress for allergy sufferers.

Filters rated for medium and high efficiency target the removal of smoke, bacteria, mold, pollen, and other minute particulates. The type of filter will determine the amount of efficiency to expect initially and throughout the service life of the filter. Some filters have a high initial efficiency and maintain that efficiency for the life of the filter. Other filters start with a lower efficiency and reach peak levels after about one month of use.

More Information about HVAC Filters

Before buying replacement HVAC filters, check the label for moisture resistance. This is important to prevent the growth of mold and bacteria. Also, verify the limits on temperature and the performance expected at application temperature levels. Flammability ratings should meet the standard set by building codes or the heating and air conditioning system's manufacturer.

HVAC filters are available as disposable panel filters, pleated filters, low to high efficiency, fiberglass, cotton, polyester, synthetic, and many other variables. Electrostatic filtration is available in combination with many of the other types of filtering media. The electrostatic charge draws in the dust like a magnet and retains it until the filter is cleaned.


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