HVAC Filter Types

Fiberglass Filters

One of the most popular kinds of filters for your heating system and air conditioner, fiberglass filters typically come in blue and are composed of a dense fabric of glass fibers that run perpendicular to the airflow. They typically have lower MERV ratings and aren’t necessarily the best filters if you have allergies. They do a great job of protecting your HVAC unit from large dust particles but fall short when it comes to trapping mold, pollen, or other smaller irritants.

Pleated Filters

Pleated filters are comprised of folded sheets of cotton or polyester-blend fabric. They’re a high-efficiency filter and a great solution that removes pollutants from your home while keeping your HVAC in optimal condition.

Disposable Electrostatic Filters

With a typical MERV value of 10 or more, electrostatic filters are exceedingly effective at de-contaminating air. They generally contain multiple layers of polyester blend materials, framed by a polyester mesh. An electrostatic filter generates its static charge, as air passes through the positively-charged outer material. They’re a little pricier than the other options but very useful for trapping mold, pollen, and other particles.

Washable Electrostatic Filters

These filters are relatively similar to the disposable model, but they’re cased in aluminum mesh and made of washable material. They’re cost-effective (generally around $20) and durable (average lifespan is 3-5 years), and offer a great alternative to other filters. Make sure that they’re fully dry: otherwise, they can grow mold and bacteria, which is then circulated throughout your house.