Air Purifier and Water Purifier

An air purifier or air cleaner is a device which removes contaminants from the air in a room to improve indoor air quality. These devices are commonly marketed as being beneficial to allergy sufferers and asthmatics, and at reducing or eliminating second-hand tobacco smoke.

Water purifiers serve a similar function as water filters, as both remove impurities. However, water purifiers go a step further by killing biological contaminants and removing minerals from water.