4 Types Of HVAC Filters

Wednesday, July 20th, 2016
Construction plumbing and HVAC in Amarillo, Texas.

Your HVAC filter should be changed every two to three months for efficiency and indoor air quality. Choosing the right type may be confusing at first. The American Society of Heating, Refrigerating and Air Conditioning Engineers has established energy efficiency standards for indoor air quality. The standard uses a rating system called minimum efficiency reporting value (MERV). The scale goes from 1 to 16, with an inefficient filter having a low number and an efficient filter having a large number. These ratings are based on the HVAC filter’s capacity for removing airborne particles.

The following information will discuss the different types and how they affect your indoor air quality. The HVAC filters covered include washable, fiberglass, polyester, pleated and high efficiency.


Washable HVAC filters are one on the lower end of the cost spectrum. This type is not best for most residential systems. Washable filters are susceptible to collecting bacteria, fungus and other microorganisms that could potentially escape and get in the air. This product has a MERV rating of 1 to 4.


Although fiberglass HVAC filters protect your AC unit from damaging particles, they do not improve your indoor air quality. If you want to improve air quality, avoid this type, especially if a member of your family is suffering from allergies. Fiberglass HVAC filters are the least expensive type, but they have to be replaced frequently. This type is typically between 1 to 4 on the MERV scale.

Polyester and pleated

Polyester and pleated HVAC filters are more effective at trapping particles than fiberglass. This type removes nearly 45 percent of pollutants in the home. Pleated filters capture more airborne particles without restricting the air conditioner’s airflow. They are also relatively inexpensive. Polyester and pleated HVAC filters have a rating between 8 to 13 on the MERV scale and are a great solution for improving air quality.

High efficiency

High efficiency HVAC filters are the best at removing air pollutants, but they are the most expensive. They are typically used in industrial settings like hospitals or other sterile environments. High efficiency types have a rating of 14 to 16 on the MERV scale.

If you need turnkey service for your HVAC, contact Allen’s Tri-State Mechanical Inc. today. Call us at (806) 376-8345 or Contact Us by email to learn more. We provide residential, commercial, and industrial services throughout the Tri-State area. You can also visit us in person at 404 S. Hayden St. in Amarillo, Texas.