What Are Electrostatic Air Filters and Should You Consider Using One In Your Heating or Air Conditioning Equipment

by Don Munn

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Electrostatic furnace filters are becoming very popular with home owners who want to achieve better air quality in their homes. These air filters are designed to replace any type of panel filter or frame type air filter you currently use in your heating and air conditioning equipment.

Electrostatic furnace filters are a combination of mechanical air filtration and electrostatic filtration. Like the technology used in many of the air cleaners commonly sold today which remove dust particles from the air by using static electricity or electronic means.

Why Use Electrostatic Furnace Filters

When selecting an air conditioner filter or furnace filter it only makes sense to use the most efficient filter possible. An air conditioning or heating system operates best with no restriction to air flow. Adding a filter to an air conditioning or heating system restricts this air flow and therefore can reduce the operating efficiency of the equipment.

The best furnace filter is the one that has the least effect on air flow but removes the most dust from the air. This is where the electrostatic furnace filter shines. Electrostatic air filters remove a very high percentage of contaminants from the air but at the same time have little effect on air flow.

This allows the air conditioning or heating equipment to operate at maximum efficiency while at the same time removing a high percentage of contaminants from the air. So the best you can hope for is to strike a balance where you get the best air filtration but also don’t restrict airflow to the point where it begins to have an impact on the operating efficiency of your furnace.

The Best Air Filter For Home Use

The best air filter for home use is the electrostatic air filter because they are very efficient and have very little impact on air flow in your heating or air conditioning equipment.

Electrostatic furnace filters are not the most efficient filter you can get for your central air conditioner or furnace. But remember, you want to strike a balance between filter efficiency and equipment performance.

There are two furnace filters that are more efficient than electrostatic filters but they are not a necessarily a better choice. The first one is the electronic air filter and the other one is the HEPA air filter.

Electrostatic furnace filters are not the most efficient filter you can get for your central air conditioner or furnace. But remember, you want to strike a balance between filter efficiency and equipment performance.

The Best Electrostatic Filter Is The Boair 5-Stage Filter

There are two things about the Boair filter that separate it from most others.

Lifetime Warranty – Never Needs Replacing BoAir AC/furnace filters do NOT contain polyester, which becomes difficult to clean over time. BoAir electrostatic filters are the only ones embedded with VIBAX MI-50, an anti-microbial which, limits and controls bacteria, mold, mildew, and helps control odor. You can learn more about these filters here.

How Does An Electrostatic Air Filter Work

As air passes through electrostatic filters, a static charge is created within the filter, as a result of this static charge dust particles are attracted to the filter and remain trapped there until the filter is washed.

The air you breathe contains many allergens and irritants such as dust, bacteria, mold spores, pet dander, pollen and smoke. Most of these particles are smaller than one micron in size and will pass through the traditional furnace filter. When you install an electrostatic furnace filter the number of particles passing through your heating or cooling system and returning to your living space will be dramatically reduced.

An electrostatic air filter will save you hundreds of dollars by eliminating the monthly cost of purchasing disposable filters. Typical disposable fiberglass filters are only 5 – 10 percent efficient. The best electrostatic air filters are over 90 percent efficient.

RiteAir sells high quality filters from Boair, Max and Hepa-Pure which are used to replace your existing disposable filter. RiteAir’s filters are compatible with all of the major brands including Trane, Ruud, Carrier, Lennox, American Standard and all others.

Don Munn About Don Munn
Don has been working in the HVAC industry for more than 25 years and shares his experience and knowledge on this site. You can also follow him on:

{ 2 comments… read them below or add one }

EEKanzig October 3, 2012 at 3:48 am

Do I have to clean this expensive filter that I have had installed in my furnace;Thanks for the info. God Bless you all.

Don Munn October 4, 2012 at 2:34 pm

Hi EEKanzig,
All filters have to be cleaned or replaced regularly. Not performing maintenance or replacing filters when required will result in higher operating costs and reduced equipment efficiency.

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