HEPA is an acronym for "high efficiency particulate air". Basically HEPA is a type of filter that can trap a large amount of very small particles that other vacuum cleaners would simply recirculate back into the air of your home. 

True HEPA filters can capture 99.97% of particles as small as 0.3 microns. Can also capture 95-99% of particles below 0.3 microns. HEPA filters were originally designed to capture and remove microscopic particles such as radioactive dust in atomic plants. HEPA filters are a mainstry in areas that requie clean air such as hospitals, clean rooms, and high-tech manufacturing plants.

We can provide HEPA filter of different size and specs. With washable HEPA filter and non-washable HEPA filter.

There are more parts of air purifier are provided, such as: Pre-filter, HEPA Filter, Activated Carbon filter, Photocatalytic Filter, UV lampl, Negatvive ion Generator and Ozone etc...

And the price is reasonable.