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Choosing the Right Furnace Filter For Healthy Indoor Air

Posted on: September 11, 2014

When it comes to choosing the right furnace air filter, there are many options available. The efficiency of furnace filters is measured on the MERV scale, or Minimum Efficiency Reporting Values, which rates filter efficiency on a scale of 1-20.

On the low end of the cost scale and MERV scale with a rating of 1-3 are disposable fiberglass filters. Made of 1-inch thick fiberglass, these filters are designed to prevent larger particles of dust, lint, and other debris from damaging your furnace.

Disposable pleated furnace filters are probably the most popular option. These filters are made from polyester or cotton paper and remove smaller particles like mold spores and mites, but should be changed frequently to avoid clogging and reducing airflow to the furnace. Pleated filters have a MERV rating of 6 and cost more than fiberglass filters.

The most effective furnace air filters are disposable or permanent electrostatic filters. With a MERV rating of 10 or higher, they offer highly effective filtration and are recommended for homes with persons with allergies or upper respiratory conditions.

Have questions about furnace filters and indoor air quality? Call ABC Plumbing, Heating and Cooling, we’re here to help.

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