Replacing a BRK 670MBX Ionisation Smoke Alarm - YouTube
670MBX Smoke Alarm – Mains Powered by BRK
BRK 660MBX and 670MBX Replacement Smoke Alarm - easichange SBBRKSM | DIY at B&Q
Need replacement smoke alarm. Current model (BRK 670MBX) discontinued. Do I *really* need to replace all (as per alarm manufacturer guidelines)? Can I not just wire up generic alarm to the circuit (