Air FIlter Sanitation In Situ

February 4, 2014

Air filters in HVAC (heating, ventilation, air conditioning) systems are most likely the only defense against airborne pollutants such as dust, pollen, bacteria, mold, viruses, etc. in our homes, offices, and indoor public places.  Most of us take for granted that the air filters will do the job and provide us with clean air.  But do air filters live up to our expectations?

 

Air filters trap dust, pollen, bacteria, dander, mold, and viruses. Air filters are rated according to their ability to trap airborne particles based on the size of the particle that is able to pass through.  The Merv rating is the standard set by American Society of Heating, Refrigeration and Air-Conditioning Engineers. 

 

We know that when garbage collects in trash cans, it produces foul odors synergistically.  The same thing happens for bacteria, viruses, and molds that become trapped in your air filters.  Under the right conditions, the bacteria and mold reproduce and the filters become breeding grounds.

 

Mold is everywhere - indoors and out.  HVAC systems provide the three necessary conditions for mold growth: moisture, food, and warmth.  An air filter for a Merv 8 rating traps 90% of all mold spores.  But these trapped mold spores can grow while dust, dander, and moisture supply it nutrients.

 

Dr. Sunshine is installed in the return air duct, next to the air filter.  UVC light and photo-catalytic oxidation (by TiO2) purify the air that pass through and sanitize the air filter.  UVC light and PCO kill the mold, bacteria and viruses trapped onto the air filters, continually sanitizing the air filters in situ.

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