Both.

1. Bailon of the United States provides indoor air quality solutions. In 2005, Bailon entered China and brought a series of technologically advanced products to improve indoor air quality to Chinese consumers.

2. Brown fresh air system is a ventilation equipment that replaces "window ventilation" to improve indoor air quality. It can not only solve the contradiction between window ventilation and building insulation and sealing, but also reduce indoor energy loss. drain.