It's important to choose the proper easichange® alarm to switch your out of date BRK models. The table beneath will let you pick the proper replacement alarm. Please Observe which you can replace your current BRK optical and ionisation alarms having an easichange optical alarm, nonetheless your BRK warmth alarm https://www.firesense.co.uk/type/conventional-fire-system/conventional-fire-alarm-control-panels/