This air shower has high velocity HEPA filtered air jets that remove any particulates. The operating modes can be functioned, and there is a microprocessor controller that oversees the functions. This model comes with a disposable pre-filter that extends the life of the main filer. There is a stop button to use in case of emergency on both sides of the shower. There are also indicator lights on both sides of the shower's exterior to help regulate traffic going in and out. The Esco cleanroom air shower should be placed at the entrance of your cleanroom.