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HEPA Filters

HEPA Filters, the most effective filter sold

Shopping for a replacement HEPA filter? You will find all the HEPA filters sold for LakeAir air purifiers here. The replacement HEPA filters are the same filters that came with you original purchase. We offer an alternate HEPA filter for the popular Maxum HEPA air purifier. this 2.5 inch HEPA filter is as effective as the standard model with a lower price tag. 

Price of replacement HEPA filters got you down? We will offer a trade in for your LakeAir HEPA air purifier towards the purchase of an Electrostatic Unit. Electrostatic Air Purifiers are nearly as efficient as HEPA filters but can be washed and used for years. Your trade in value will depend on the model you have and the model you are looking to switch to. You can call our Customer Service Department at 800-558-9436 for an exact quote

Buy With Confidence

  • 30 Day Returns if you don’t Love it
  • Free Shipping on all HEPA Filters
  • Buying 4 0r More? Call for a Deal!
  • All LakeAir  HEPA’s are True HEPA
  • Each Filter Lasts an Entire Year 
LakeAir Mini HEPA Filter
  • Maxum Mini HEPA Filter
  • 499061
  • 12 x 16 x 2.5
  • 99.97% True HEPA
  • $.159.95

HEPA Filter Facts

HEPA stands for high-efficiency particulate air. A HEPA filter is a type of mechanical air filter; it works by forcing air through a fine mesh that traps harmful particles such as pollen, pet dander, dust mites, and tobacco smoke. The filter must satisfy certain standards of efficiency such as those set by the United States Department of Energy (DOE). To qualify as HEPA by US government standards, an air filter must remove (from the air that passes through) 99.97% of particles that have a size of 0.3 µm. HEPA filters were commercialized in the 1950s.  The original term became a registered trademark and later a generic term for highly efficient filters.

HEPA filters are composed of a mat of randomly arranged fibers. The fibers are typically composed of fiberglass and other synthetic fibers. These fibers usually have diameters between 0.5 and 2.0 micrometers. Key factors affecting its functions are fiber diameter, filter thickness, and face velocity.

The air space between HEPA filter fibers is typically much greater than 0.3 μm. The common assumption that a HEPA filter acts like a sieve where particles smaller than the largest opening can pass through is incorrect . Unlike membrane filters at this pore size, where particles as wide as the largest opening or distance between fibers can not pass in between them at all, HEPA filters are designed to target much smaller pollutants and particles. A recent NASA has released a study where they have shown that HEPA filters are even more effective on particle as small a 0.1 micron. These particles are trapped (they stick to a fiber) through a combination of the following three methods:

The first method is impaction.  Impaction is what most people think of an air filter doing. Larger particles are readily caught in the tight weave. As more and more particles are trapped the room for smaller particles to slip by is diminished and the filters effectiveness increases. The second method in interception: Interception is more a matter of particle capture. The HEPA filter can capture small particles when the com close to filter elements. This magnet like capture becomes more likely as the speed of the passing particles decrease. Which leads us to the third mechanical method called diffusion. Diffusion is the act of slowing a particles progress through the filter bank. As particles slow they are then much more easily trapped by the first two methods.

How a filter traps dirt in a home air purifiier
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