Frequently Asked Questions

How does an electrostatic air filter work?
The Air Filter Stores electrostatic air filters utilize a patented configuration of alternate polarity, self-charging layers of polypropylene filtration media, to attract particles as small as 1 micron, 1 micron = 1/25,000 of an inch. Just like opposite poles of a magnet attract one another, a positively charge dust particle is attracted to the negatively charged polypropylene media of the filter. This electrostatic property is what gives our air filters the the high efficiency that ordinary disposable filters just can't match.

How do I clean my electrostatic filter?
1. Use a vacuum cleaner to remove any heavy buildup of dust and lint that may have accumulated.

2. Lay the filter flat and spray it with a cleaning detergent(409, Fantastic, Rugged Red, Ivory Liquid, etc.) on one side and then the other until the filter is soaked the the detergent. The amount of detergent required will be dependent upon the amount and type of pollutants held in the filter.

3. Lay the filter with the dirtier side down or prop at angle against fence or outside wall and flush the detergent from the filter using a garden hose with a nozzle set at the high pressure setting. If laying flat, a 1" or 2" object should be placed under one side of the filter frame to allow room for the water and dirt to escape. Turn the filter over and repeat the same procedure.

4. Perform steps 2 and 3 until the filter is clean. If the filter is extremely soiled, it may be more convenient to use a car wash facility to remove all embedded dirt from the filter. Always lay the filter flat when using high pressure water for cleaning.

5. Shake excess water out of the filter and allow it to drip dry to the extent that it can be carried without dripping water. IMPORTANT: Your filter should be cleaned regularly to maintain maximum air flow in the system.

Which way should the air flow?
The air should flow according to direction shown on the filter's label.

Can I put more than one filter in my system?
Due to air restrictions, it is not advisable to use more than one filter per return.

How do I know what size to use?
Simply order the size that you are using now with your throwaway filter. If you are not buying a throwaway filter now, measure from inside lip to inside lip both horizontally and vertically and choose from our 40 standard sizes. Custom sizes are available.

Will the filter cause damage to my existing unit?
Due to the filter's low resistance to airflow, it is compatible with all air handling systems. If there is a question, please call a service contractor.

How do I know that the filter is working correctly once installed?
The filter will work as long as it is clean and air is passing through it. If you would like to see what your filter is catching, wash your filter in a sink or tub which allows the water to be held. By placing this water in a glass, you will be able to see that particles which had been trapped by the filter. Some particles are very light in color and will not be visible on the face of the filter but will be seen in the water used in cleaning.