Air Ionizers are used in air purifiers to remove particles from air. Airborne particles become charged as they attract charged ions from the ionizer by electrostatic attraction. The particles in turn are then attracted to any nearby earthed (grounded) conductors, either deliberate plates within an air cleaner, or simply the nearest walls and ceilings. There are two types of ionic air purifiers, the fanless and fan base ionizers. The fan base Ionizers uses its fan to circulate air around the room rapidly but it is noisier and consumes more energy, while the fanless types distribute air slowly hence take a longer time to purify air but are noiseless and energy efficient.