Silicon Valley Air Expert Inc. is a leading air purifier company founded by a group of technology experts and entrepreneurs from Silicon Valley. They are dedicated to developing innovative air purification solutions based on ionic wind technology, which is called TPA technology. Their Airdog air purifiers are high-performance and eliminate the waste and expense of disposable filter cartridges. Airdog is silent, energy-efficient, and easy to use. It offers you clean air and is a green solution to purifying the air in your home.