introduction
The air conditioning system is one of the essential elements in buildings that is used to provide the right temperature and indoor air quality. One of the main components of the ventilation system is air transmission channels. These channels are divided into two categories of metal and non -metallic channels, each with their own features and benefits. In this article, we examine the benefits of using metal and non -metal channels in building ventilation systems in Mashhad and we provide tips on choosing the best option for this city.


