It's important to choose the right easichange® alarm to replace your obsolete BRK products. The table below will allow you to pick the correct substitute alarm. Remember to Observe you could change your existing BRK optical and ionisation alarms with an easichange optical alarm, even so your BRK warmth alarm https://www.firesense.co.uk/type/conventional-fire-system/conventional-fire-alarm-control-panels/