Study after study shows that as homes become tighter and more energy efficient, more contaminants become trapped inside. The average person spends about 90% of his/her time indoors. The air we breathe in our homes is loaded with pollutants like:
Pollen Lung damaging dust Pet hair dander Dust mites Tobacco smoke Spores Disease-causing bacteria and viruses
Considering the typical throwaway furnace filter only traps about 5-15%of these polluting particles and that the slightest traces of pollutants can trigger miserable reactions for allergy sufferers, you need serious help.