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We all know that HVAC systems require air filters, which prevent dirt from getting into the system. The coil, blower fan, heat exchanger and other parts can be damaged by dirt. An air filter that’s not changed when it’s dirty can slow down the system, causing it to work harder and costing you more money. What’s more, a dirty air filter can have an adverse effect on your indoor air quality.

The Basic Air Filter

Most homeowners opt for a disposable filter made of fiberglass that’s only designed to trap the largest particles of dirt that might be drawn into the system. These types of filters, which usually cost a few dollars, won’t keep the smaller particles such as pollen, pet dander, mold, spores and other microscopic pollutants out of the air that’s re-circulated into your home.

These cheaper filters are usually given a minimum efficiency reporting value (MERV) rating of between 1 and 4.

Opting for a Better Filter

You’re better off selecting a pleated filter with a higher MERV rating. Although anything above MERV 4 does a much better job of cleaning the air, the higher you go, the more particles a filter will trap. However, the higher the MERV, the more airflow may be slowed down. Generally homeowners should choose a filter between MERV 5 and 8.

Other types of filters available:

  • Electrostatic filtration traps particles using friction produced as the air flows through the filter.
  • Electronic filters use a high-voltage transformer to charge particles to trap contaminants on a collection plate.

Regardless of which type of filter you choose, be sure to change it or clean it when it’s dirty. This is important not only to your indoor air quality, but it’s necessary in order to keep dirt out of the HVAC system so that it works efficiently and lasts longer.

For more information on air filters, contact Senica Air Conditioning, Inc.. We serve Spring Hill, Crystal River and the surrounding area.

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