How to Clean an Electrostatic Air Filter

Electrostatic air filters, though several times the cost of disposable air filters, can be used for years and are proven to be more effective at filtering dust, dirt, allergens and other particles from the air. However, an electrostatic air filter must be cleaned regularly to keep it working at its peak. A filter that is given routine maintenance will help you cut down on indoor dust and allergens, but a dirty filter can actually help spread these particles.

Things You'll Need

• Electrostatic air filter
• Vacuum cleaner
• Garden hose
• Liquid dish soap
• Water
• Plastic spray bottle

Instructions

1. Remove the electrostatic filter from the vent or cold air return.

2. Vacuum all of the loose dust and dirt from the dirty side of the filter. All of the particles should be accumulated on the side facing the duct work.

3. Inspect the filter carefully. With regular maintenance, vacuuming is often enough to clean the filter well. If you still see dirt or embedded particles, proceed to the next step. If not, skip to Step 8.

4. Drizzle a couple of spoonfuls of liquid dish soap into a plastic squeeze bottle, fill it the rest of the way with water and shake it up.

5. Take the filter outside and lean it against an upright surface with the dirty side facing out. Spray it down generously with the soapy water and give it about 5 minutes to set.

6. Turn the filter around and prop it up so that the clean side is facing out. Spray the filter well with a garden hose. When you think you're done, turn it around and make sure it's clean and suds-free before putting the hose away.

7. Allow the filter to dry in the sun for about 20 minutes.

8. Replace the filter in the vent or cold air return.

Tips & Warnings

• If you spray down the filter in the same direction as the air flow, it won't clean the particles out; it will just push them farther into the filter material.