What are different types of filters used in air conditioning system?

Standard

A standard air conditioner filter is made of spun fiberglass and have cardboard frames. It is only capable of removing 10 percent of airborne pollutants. Standard air conditioner filters only remove larger particles and do not filter harmful allergens and contaminants very well. You have to change these filters every month.

Pleated

The next type of air conditioner filter is pleated. They are manufactured by folding filter material back and forth and have a larger surface area than standard filters. They are capable of removing 35 to 40 percent of harmful particles in the air. Pleated air conditioner filters are slightly more expensive than standard air conditioner filters and you need to replace them once every three months.

Electrostatic

An electrostatic air conditioner filter uses filter media that has an electric charge that attracts contaminants. They can have a built-in electrostatic charge, or else create a charge from the air moving through the system. Electrostatic air conditioner filters can remove around 90 percent of particles and cost anywhere from $30 to $100. You only need to replace them once every three months.

HEPA

Another type of air conditioner filter is HEPA, or High Efficiency Particulate Arresting filter. They are able to trap 99.97% of contaminants including fibers, dust, smoke, and pet dander. They can effectively trap particles 1/300th the width of a human hair.

Electronic

You can also use an electronic air cleaner in your air conditioner. Although these air cleaners function much like electrostatic filters, they are more effective. They use a fan to trap up to 95 percent of particles in an electrostatic precipitator. These devices are usually recommended if you have Allergies.