洗澡後都會開動抽氣扇把浴室的濕氣抽掉,但好多時都會忙記把抽氣扇關掉,尤其住花園屋或城市屋的,所以,當安裝了時間掣後,無需再跑回樓上去把抽氣扇關掉。 We always forget to turn off the bathroom exhaust fan after turn it on. This time I show you how to install a switch timer for the bathroom exhaust fan. So you don't need to turn it off anymore and save your money.