No matter how powerful the unit is, the negative ions do not travel very far from where the unit is placed, since they only live for about 30 seconds once generated. In which case, only about one room is being ionized if only one ionizer is being used. Using multiple units allows you to ionize a much larger part of your home, if not all of your home. Using multiple air purifiers eliminates this inherent disadvantage. Surround Air Ionizers finally make it affordable to buy multiple air purifiers.
Air filters are very costly , and only purify a small percentage of the air in just a single room.
Negative ion and ozone combination air purifiers, such as Surround Air Ionizers , are able to remove particles of a much smaller size . Negative ions and ozone can also cover a room or area much more thoroughly than a stationary filter. Buying an air filter for each room would be much more costly. Affordable to buy as many ionizers as you need. This makes it possible for every part of your home to receive optimal ozone and negative ion air purification , instead of just one room or area.