Rainbow says their system works best because, most dirt particles contain an electrical charge that is opposite from the electrical charge of water. Opposites attract and thus the dirt and dust are trapped in the water.

Water Filtration captures 99.997% * * of typical household dirt. Water washes the dirt from the air stream.

Some materials are not "wettable" and develop an electrical charge that is repelled by water (for example fireplace ash and plaster dust). These tiny particles may follow the air stream without ever contacting a water droplet. The Rainbow Hepa Neutralizer has been specially designed to capture these particles.

The Power of Water combined with The Hepa Neutralizer traps microscopic particles such as: ragweed pollen, fungal spores, mold spores, bacteria staphylococcus, pet dander, dust mite droppings and many other common household irritants.

The combination of Water Filtration and Hepa Neutralizer technology results in industry leading filtration.