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Which Filter is Better?

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Furnace filter types:


 
  • Fiberglass particle filter - These inexpensive disposable filters stop large particles from entering the furnace and being sent through the ductwork into the house. They do not help filter particles that worsen allergies etc.
  • Passive electrostatic filter - These washable filters use a static charge to attract particles. They filter smaller particles than the fiberglass filter but are only able to block a minority of particles in the air.
  • Pleated filter - An increase in the surface area of the filter helps trap a larger particles by allowing a finer mesh pattern without interrupting air flow to the furnace.
  • Electronic filter - One of the most effective options that comes with a price. Electronic air filters are expensive costing several hundred dollars but they do trap as much as 80-90% of airborne particles. If you are concerned about allergies or illness this is a good choice for your home.
  • HEPA filter - Traps more air particles than any other filter but are typically only used in commercial buildings.