Why Choose A Room Air Purifier with HEPA Filtration?

Most household and office free standing room air purifiers are purchased for the purpose of filtering perceived “dirty air” within a relatively enclosed space. Air pollutants you are might be concerned with, according to your individual situation might include dust, dust mites, pollen, mold spores and pet dander. HEPA filters are considered a gold standard for removal of such irritants. A HEPA rating to remove particles as fine as .3 microns is recommended in combination with a pre-filter (to catch larger free roaming particles in the room.)

How Do HEPA Filters Work?

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 a percentage of harmful particles so they do not enter your respiratory system. Recommended specifications for HEPA filters in this environment should state in the specifications that it removes at most 99.97% of 0.3-micrometer particles, and are usually more effective for particles which are larger. In dusty environments, a HEPA filter may follow an easily cleaned conventional filter (pre-filter) which removes coarser impurities so that the HEPA filter needs cleaning or replacing less frequently.  Note that HEPA filters do not generate ozone or harmful byproducts in course of its operation.



HEPA and MERV – A Brief Explanation

There are expensive products and solutions and basic portable ones (that do the trick for small rooms) out there. If you're looking for an air filter for your home, it can get confusing quickly. You'll come across both MERV and HEPA rated filters. The following information will help you understand some terminology.


MERV stands for Minimum Efficiency Reporting Value. These filters are rated on how small of a particle they can filter out of the air. The numbers range from 1 to 16, and the higher the number, the better. A low ranking filter is rated 1-4 MERV, and medium filter falls into the 5-13 MERV range, and high-efficiency filter will range from 13 to 16 MERV. The high-end filters can filter particles as small as 0.3 microns with 75 percent efficiency.


HEPA stands for High Efficiency Particulate Air filters and they are super-efficient. They will range from 17-20 MERV. HEPA filters meet standards that remove at least 99.97% of airborne particles down to the size of 0.3 microns. These levels of filters are often used in hospitals to stop the spread of disease-causing organisms.

Lady with Vacuum

Take A Sensible and Realistic Approach


You most likely will not need to consider hospital grade solutions. For the ultimate in indoor air quality, HEPA level filtration incorporated with a balanced ventilation system is best. In reality, there is no perfect solution. This is because controlling the airflow of outside air and other indoor room air will always be an issue to wrestle with. A balanced system brings in fresh outdoor air, runs in through the HEPA filter before delivering it to the home. Then the exhaust system removes stale air, with any particles that may have been brought indoors on people's clothing or pets. These are expensive and costly to install. So if you are simply looking to improve single room air quality – portables are a great practical solution.

Boosting the Effectiveness of your HEPA Room Air Purifier


While a free standing HEPA filtration device definitely helps, other parts of the overall strategy should include

  • Vacuum frequently with a vacuum cleaner that does not release suctioned particles back into the air.
  • Replace carpets with wood, tile, or vinyl flooring.
  • Keep pets outdoors if you are allergic to pet dander or at least away from your sleeping area.
  • Change bedding frequently and wash sheets in hot water.
  • Replace draperies and curtains with roll up shades.
  • Use plastic covers over mattresses and pillows.
  • Use high-efficiency furnace filters.