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Air Filtration


Air filtration is one method of removing airborne particulate from the air by trapping it on a specially designed surface. Filters have the property of being able to capture and hold pollutants as air passes through it. Most heating and air conditioning units are equipped with such a filtering system.


Originally integrated into the HVAC system to protect the operating components from dirt exposure, this device has proved to be very beneficial.

OVer the years, filters have evolved to incorporate other techniques such as ionization to help attract and hold particulate by creating opposite charges to the impurities and capturing filter. Other filters use complex fiber designs and multiple densities to increase their capturing and impingement abilities. The true effectiveness of a filter is gauged by its ability to encapsulate a certain size particulate at a certain rate of air flow.


It must be noted that some of the better filters have the ability to trap very small particulate and even some types of bioaerosols. These filters can become a problem if not maintained as directed. Bioaerosols trapped in a filter that has not been changed or cleaned as directed can become a BREEDING GROUND for other dangers given the right conditions.


By placing a Second Wind Air Purifier ahead of your filtration system in the Return Air you can attack those bioaerosols and damage their DNA to prevent problems of microbial growth on your filtering system.  If a new filter system is needed, a Second Wind model 9000 or 9200 Series may be your best option.  Air Purification, Filtration and  Odor Control All-In-One unit! 


This category refers to particles that are often thought of as dust, but are often combinations of Dirt, Dust, Dead Skin, Pollen, Building materials and Smoke.  Particulate are considered inert, meaning not alive, but living organisms like dust mites can live on those particles. During the course of a year, the average home accumulates approximately 40 lbs of household particulate.


Inert particulate alone usually cause the least amount of health problems, but for some, may become a severe irritant, causing reactions or life threatening illnesses such as cancer and heart disease. An example would be asbestos or cigarette smoke.  Most basic HVAC filters are inadequate to cope with the many different sizes and types of particulate.   

Heavier particulate is usually removed by vacuuming and dusting.  Lighter migratory particulate or dust can be removed by portable or fixed filtration systems. Particulate of under 2.5 microns can infiltrate the lining of our lungs.


Filters are great and a necessity of an airflow system in just about every home.  However, (Filtration Alone is Inadequate) to address other airborne agents that are potentially more harmful.  Many microscopic organisms can flow through some of the best filters, as do chemicals and viruses (see chart below, HEPA limit is in RED).


Although airborne living organisms (bioaerosols) are often referred to as particulate when determining the total suspended particulate (TSP) or respirable suspended particulate in a building, we have separated this classification into it's own category for explanatory purposes.


Second Wind offers several options for filtration in its All-In-One Solutions for your home.  Please see our products Residential section and look at the 9000 & 9200 series.


Breathe Easy, Second Wind is Taking Care of Your Air!





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