The filter for your HVAC system does two things: clean the air and protect your HVAC components. These filters catch and remove particles from the air, making sure your air clean to breathe while also keeping these same particles out of the working components of your system. Although any filter is better than none, there is quite a difference in the quality of filters and what particles they can capture from the air.
Three Types Of HVAC Filters
HVAC filters are rated on the MERV system, the minimum efficiency reporting value. This rating runs from 1-16, with 16 at the highest level of efficiency. Three of the most common types of HVAC filters and their MERV ratings include:
– Fiberglass. The most basic filter uses fiberglass as a filtering agent. These filters are very cost effective, yet have a low MERV rating of between 1-4 in most cases. While these filters will help protect your system, they are not designed to improve air quality in your home.
– Pleated and polyester. The next step above fiberglass filters is the pleated and polyester filters. These also will protect your HVAC system, plus remove more of the harmful contaminants in the air. The MERV ratings on these filters usually ranges between 8 to 13.
– High-efficiency. The highest level of air quality from an HVAC filter comes from the high-efficiency filters. These filters are also pleated, removing up to 85% of pollutants from the air. These filters have the highest MERV rating of between 14-16. Although these are the highest rated filters, they are usually reserved for commercial use.
Whatever filter you choose, make sure it is changed as part of your regular HVAC maintenance. Your local HVAC service company can check and replace your filters for you when performing tune-ups or other scheduled maintenance.
Posted on behalf of James Smith, ClimateSmith LLC
