自然通风从四周外墙处进风，然后将污浊的室内空气利用楼梯间角楼的烟囱效应向外拔风。

Natural ventilation enters the wind from all around the outer wall place, then in the filthy room the air outward will pull out the wind using the stair hall watchtower chimney effect.

机械通风选项，用大尺寸换热器和低能耗风机来补充由烟囱效应引起的空气流动。

The mechanical option makes use of oversized heat exchangers and low power fans to complement the passive stack effect already assisting the air movement in the ducts.