Air scrubbers usually help in air purification by making use of ions and ozone. There are also air scrubbers that make use of just a filter and a fan and draws in impure gas in large amounts and releases out pure and clean air. There are some very important basic techniques followed in filtering. They are the Wet scrubbing technique and the Dry scrubbing technique. Wet scrubbing involves the use of certain special tools like a moist pad, wet cloth and a liquid chamber through which the impure gas is passed through. It works on the principle of letting the wet air pass through the moist and wet chambers so that the residue get stuck on it. Later, the air minus the residue passes through the cleaner and releases out as clean and pure air. There are certain wet scrubbers which use only water as a cleaning agent. But there are also devices which use reagents and solutions to filter and clean chemical compounds present in the air. Dry scrubbing usually involves the use of an ionic air purifier. There are also advanced versions which make use of activated alumina, various porous materials, etc which are treated with chemicals. They effectively perform the function of removing and filtering chemical compounds from the air and in releasing out clean and pure air. In conclusion, air scrubbers are the most necessary devices in work places where chemicals, fumes and other poisonous and harmful substances are released out into the air always.