Plus Minus, Japan known for their simple designs has announced series 3 of their popular line. The Air Purifer is sleek and modern appliance. Since it is an appliance that cleans the air by passing it through a filter, it is better that the design too be an attractive one touts Plus Minus. It comes in black, gray and white.The front casing, made of metal and which has tiny holes in it, forms a kind of texture which isn't conspicuous. The upper surface is the section through which the clean air is expelled; shaped like the end of a bugle, it follows the flow of air.