Quiet air conditioning: Air speed and silencing

A cross-section diagram of air supply. Air conditioning is supplied from under the seats or from the side of the seating area at an extremely low air speed. The duct cross-section is enlarged, lined with sound-absorbing material, and has silencer boxes at turns. The air outlets are fine grilles hidden between chair legs, with no noticeable airflow sound. Avoid: using large, high-speed air outlets in the ceiling, having ducts directly open without silencing, placing the equipment room directly adjacent to the auditorium, or directing air outlets directly at the audience's heads.

Translated from Chinese by AI.

一張送風的剖面示意。空調從座椅下方或座位區側邊以極低風速送出,風管斷面加大、內襯消音材,轉彎處有消音箱。出風口做成細密的格柵藏在椅腳之間,沒有明顯的風聲。避免:使用天花高速送風的大型出風口、風管直接開口沒有消音、把機房緊貼觀眾席、讓出風口正對觀眾的頭部。