Designed and engineered in the US & UK ensures that the ionbox is modern, state of the art, and innovative. No other ionic air purifier even comes close to the negative ion out put of the ionbox — most other brands do not even cite their negative ion output. The ionbox is the best negative ion generator, outperforming other units in its size class but also outperforms other purifiers 10, 20 times its size. You will breathe cleaner, and healthier air, with the ionbox.