Air Purifier Guide

HEPA means High Efficiency Particulate Arresting.The HEPA  filters have been around for quite some time from 1950s. Since then HEPA air purifiers have been using this technology to clean the indoors in cleanrooms to beauty parlors. HEPA products are also one of the many techniques and products used by Allergy and Asthma doctors to help alleviate the symptoms of those conditions.

HEPA is a filter system that is extremely fine in terms of what it can remove – it gets particles as small as .3 microns, which will generally get pollen, mold spores, smoke, and other air pollutants. However, it won’t remove most chemicals as the particles are too small – so you might want to make sure that the brand you choose uses multiple systems in order to get rid of everything nasty in the air.

HEPA air purifiers are straight forward, a fan forces airflow through a filter. The more times the airflow goes through the filter in an hour the cleaner the room. So, the bigger the room, the bigger the product, or our preference, the more small air purifiers. Why? Think about a long narrow room. If you put the product at one end how often is the air from the other end going to get through the HEPA filter? Not often. If you put smaller air purifiers at either end of the room the air will only have to move half as far to get through the HEPA and get clean.

A HEPA air purifiers removes at least 99.97% of 0.3-micrometer particles, and are usually more effective for particles which are larger or slightly smaller. They are effective down to 0.01 micrometers in many cases, but become ineffective for particles smaller than 0.01 micrometer. HEPA purifiers which filter all the air going into a clean room must be arranged so that no air bypasses the HEPA filter. In dusty environments, a HEPA filter may follow an easily cleaned conventional filter (prefilter) which removes coarser impurities so that the HEPA filter needs cleaning or replacing less frequently. HEPA filters do not generate ozone or harmful by products.