DX modular AHU amaceuticals and so on. There are three different types for different situations.
- Application sites without fresh air.
- Application sites with partial fresh air. The primary air return solution applies to the site with a low ventilation frequency; the seconder widely applied such as clean operating room, Inspection and quarantine, Pharary air return solution applies to the site with a high ventilation frequency or the air flow of selected model far surpassing the nominal air flow.
- Application sites with a greater fresh air ratio.