In northern Europe it is usually necessary to raise the temperature slightly to reduce the RH.This does not affect the water vapour concentration in the room, which follows that outside.

• 真正的被动式控制应当是，它可以在夏天吸收太阳能热量，并将热量保存于建筑物吸附材料中，冬季时自然释放热量以保证室内相对湿度恒定。