@PotatoClose @PSQ17266 @Kit_Yates_Maths Also you don't need two in every room. Two in each *classroom* was used in the Italy study. Classrooms are high occupancy. In other sorts of facilities you might need one per room or not at all. Not needed or can be phased out w/good facility HVAC, but that's not a baseline.
@PotatoClose @PSQ17266 @Kit_Yates_Maths 你也不需要每个房间两个。意大利研究中使用了每个*教室*中的两个。教室占用率很高。在其他类型的设施中，您可能每个房间都需要一个或根本不需要。不需要或可以通过良好的 HVAC 设施逐步淘汰，但这不是基准。