Electrostatic Filters

Washable Electrostatic Air Filters

If you are tired of buying expensive air filters, just to throw them into the trash every month or two, our EG Filters might be the answer because they are washable. When they are cleaned as directed, they will last for many years of trouble-free use. They truly are quick and easy to clean.

How do they work?

Our EG Filters clean the air with safe, naturally occurring static electricity. As air is circulated by your heating and air conditioning system an electrostatic charge is generated by the air flowing through a maze of static prone fibers inside the EG Filter. The airborne pollutants, like dust, pollen, and other allergens have an opposite electrostatic charge so they stick to the filter’s fibers.
You have probably experienced this phenomenon throughout your life. Think about rubbing a balloon against your hair. Because of the opposite charges attract, your hair sticks to the balloon. With the EG Filter, airborne particles are attracted to, trapped and held by the static charge of the filter until they are released by washing.

  • Removes Tiny Particles  Indoor air contains many irritating particles including pollen, dust, bacteria, mold spores, pet dander, and smoke. These particles are often smaller than ten microns and can actually pass right through conventional air filters. Airborne particulates account for about 35% of Indoor Air Pollution. Your new EG Filter is designed and tested to be an effective, efficient and affordable way to reduce these tiny particles in your air.
  • Improved Airflow  A unique characteristic of EG Filters is the way they provide maximum airflow and maximum air filtration at the same time. Instead of becoming clogged like conventional filters, the dust loading pattern of our electrostatic fibers increases the DHC or Dust Holding Capacity without reducing the Arrestance so your HVAC system continues to run efficiently.
  • Reduced Bypass Our EG Filters feature a Gold Frame. No, it’s not really made of gold, but they are made with a premium quality extruded aluminum. The gold anodized aluminum provides a durable frame with an attractive finish. The frame is very rigid and has a metal mesh screen to retain the static prone fibers dramatically reducing the risk of a dirty filter allowing unfiltered air to circulate through your HVAC system. The frame consists of four pieces fastened at each corner making the frame strong and sturdy. Our EG Filters come in the standard 1″ depth and are available in two levels of Arrestance, 94 and 82, to prevent loss of airflow, icing of evaporator coils or even damage to your system.
  • Maximum Arrestance Our 94% Arrestance filter provides exceptional filtering capacity, trapping up to 94% of airborne particulates. Unfortunately, many HVAC systems can’t handle that much air restriction, so we also offer an EG Filter with an 82% Arrestance rating allowing greater airflow. These less restrictive filters will work on virtually any heating and cooling system and but with slightly less filtering capacity. If the square footage of your filters is less than the size of your HVAC system in tons, we strongly recommend an 82% Arrestance filter to avoid too much airflow restriction. If you know the size (in tonnage) of your system and the size of your filter(s) in square feet you can determine if your system can handle the 94% EG Filter. If your home has one HVAC system with one air filter multiply the filter length and width, then divide by 144 inches per square foot. If you have two filters on one HVAC system add the filter sizes together. If you have two or more HVAC systems, use the above method to calculate the measurements for each system separately.

Here are some examples: 

Example 1:

If you have a 20” × 25” x 1” filter and a 2.5-ton unit, your filter’s square footage is greater than the tonnage of your unit so you can use a 94% Arrestance EG Filter.

Here’s the math: Simply multiply the length and width of your filter, then divide by 144 to get your filter size in square feet.

20 x 25 =500 square inches, divided by 144 inches per square foot equals 3.47 sq. ft. Since 3.47 is greater than 2.5, so you can safely use a 94% Arrestance filter.

Example 2:

If you have a single HVAC system with two filters, one that is 12” × 20” x 1” and the other is 12” x 12” x 1” and a 3 ton system, your filter’s square footage is less than the tonnage of your unit so you should choose the less restrictive 82% Arrestance EG Filter.

Here’s the math: Multiply the length and width of both filters then add them together, next divide the combined filter size in square inches by 144 to get your total filter size in square feet.

Filter one, 12 x 20 = 240 square inches, divided by 144 inches per square foot equals 1.67 square feet.

Filter two, 12 x 12 = 144 square inches, divided by 144 inches per square foot equals 1 square foot.

Then add 1. 67 and 1 for a total of 2.67 square feet. Since 2.67 is less than 3, so you can safely use an 82% Arrestance EG Filter.

Sizes and Materials

All our EG Filters, both 94% and 82% Arrestance contain an EPA registered anti-microbial material to inhibit the mold and bacteria growth on the filter surface. Standard Size EG Filters are made to industry standard and are 3/8″ smaller than the labeled size. For example, a 14 x 24 filter will actually measure 13 5/8″ x 23 5/8″.
Customer sized filters are also available. Please call us for details on the best filter choices for your needs.

Caution: All Electrostatic Air Filters are not created equal.

  • Some electrostatic filters use multiple layers of different materials to create the electrostatic charge, making them very difficult to clean. Often, these filters require you to clean each layer separately and it can take 20 to 30 minutes to disassemble, wash and reassemble your filter.
  • Some electrostatic filters only capture tiny particles and let the larger debris pass through. The dust and dander particulates in this inadequately filtered air can quickly build up on your systems evaporator coils, and other components where it blocks airflow and becomes a perfect growing medium for mold and mildew.
  • Some electrostatic filters have special pads that require frequent replacement, adding cost and waste.
  • Some electrostatic filters need to be plugged in to operate properly, using additional energy.
  • Some electrostatic filters block airflow. While electrostatic filters can hold more dust than conventional filters without decreasing airflow, some restrict the airflow too much even when they are clean. This makes your HVAC system work harder, wastes energy and causes excessive wear.

Electrostatic Air Filter Benefits

  • Lifetime Warranty
  • Easy to Clean
  • Reduce Landfill Waste
  • No Harmful Ozone Emissions
  • Traps More Airborne Pollutants
  • Greater Dust Holding Capacity
  • Improved Indoor Air Quality


Electrostatic Air Filter Cleaning

Cleaning our EG Filters is quick, easy and if you follow these directions your new EG Filter will give you many years of trouble-free use. Failure to properly and routinely clean the filter may lessen the filter’s effectiveness. ANY brand of Air Filter, including our EG Filters, can become clogged over time. Failure to clean or replace your filter can cause excessive buildup and airflow restriction could potentially cause damage to HVAC components.

Depending on your specific situation the filter should be cleaned every 3-6 weeks.

Cleaning Instructions

  1. Remove the air filter from its holder. Always use caution on ladders.(If the HVAC system is on, it can hold the filter tightly in place. Overhead filters can be more difficult, see Overhead Filter Tips below.)
  2.  Flush with water in the opposite direction of airflow arrows then rinse the other side of the filter.
  3.  Spray with an approved electrostatic filter cleaner, like CEF Cleaner, to remove any stubborn stains and refresh the static prone fibers.
  4.  Repeat step 2 to thoroughly remove any remaining dirt and cleaner. 
  5.  Stand the filter on its end or on one corner to drain excess water. Allow at least 20 minutes of air-drying time (longer on wet, humid days) and reinstall.

Note: Many customers purchase two so they can install the second filter while they wash the first. Then next month they can reinstall the first filter while the second filter is washed and dried.


Overhead Filter Tips:

Working with an assistant can be helpful when changing filters in overhead filter compartments.

With the HVAC system ON, carefully open the grill cover.

Get ready… now have your assistant turn the system off.

As the airflow reduces the filter will drop into your hands.

Remember EG Filters are heavier than paper or plastic so be careful.

When reinstalling the EG Filter, simply turn the system on first.

The airflow will suck the filter up into the compartment and hold it in place while you close the grill cover.

If the filter makes a clanking sound when the system turns off, simply add fabric dots (like you use on the bottom of furniture to protect hardwood floors) to the room side* of the filter. As the filter drops the fabric will prevent the clanking sound.

*Caution: Do not put the fabric dots on the ceiling or duct side of the filter or filter compartment. This would allow the dirty, unfiltered air to go around the filter. As this dirty air bypasses the filter it is circulated through your entire HVAC system and home or office.