How Do Electrostatic Air Filters Work?
Electrostatic air filters are made of multiple layers of vented metal. As the air passes through the layers, the molecules become positively charged by the friction between the air and the filter. This positive charge causes dirt particles in the air to cling to the metal surfaces of the filter, preventing most dirt from passing through to the furnace and air ducts.
Advantages of Electrostatic Air Filters
The main advantage of electrostatic air filters is that they are reusable, and therefore can save money over time. When the filter becomes dirty, you simply vacuum or hose it off. While the up-front cost is more than most disposable media filters, they should last a long time.
Disadvantages of Electrostatic Air Filters
There are several important disadvantages to electrostatic air filters. First, high quality disposable media filters are usually more effective at removing fine dirt particles. Second, because they charge the air, any dirt that makes it through the filter will cling to air conditioner coils and air ducts, causing dirt to accumulate, and potentially causing air quality issues. Finally, a standard media filter is simple to dispose of and replace, while electrostatic air filters require time to clean off.
Have questions about furnace air filters? Call ABC Plumbing, Heating, Cooling and Electric, we can help.
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“Paul B. serviced my furnace yesterday with an inspection and cleaning. He didn't stop there though, I had purchased a new filter for my humidifier on the furnace and he replaced that for me, showed me how to do it in the future and explained how to adjust the humidity…”–