Originally designed to protect the furnace motor and internal components, furnace filters are housed between the air intake and the heating coil, motor, and fan of the furnace. Furnace filters trap dust that can cause damage to the furnace motor. More importantly, however, furnace filters improve airflow and efficiency of a furnace. Without a filter, the furnace would quickly become clogged with dust, forcing it to work harder to expel air, and eventually overheat and break down. If your furnace filter does become clogged, then its purpose is defeated.
Follow these guidelines to replace your furnace filter once a month:
Most furnace filters today are disposable, although some are meant to be cleaned and reused. You can purchase furnace filters for just a few dollars, or spend a substantial amount of money for permanent filters and those designed to improve air quality. Most furnace filters are made from fiberglass and are rated by the MERV ranking system, which stands for Minimum Efficiency Reporting Value. The higher the MERV rating, then the more efficient the filter is going to be. Higher quality filters are available to help improve air quality for household members with allergies and respiratory problems and those filters can make a huge difference.
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