Official replacement for discontinued ST620 – compatible with existing baseplate and simple to swap over. Ideal for areas adjacent to kitchens e.g. downstairs 

We have therefore checked on your behalf how to replace your old alarms and have come up with one replacement smoke alarm that fits onto the base plate of all the smoke alarms listed below. This alarm has also an improved specification and a long-life battery which should reduce false alarms and stops the need for battery changes.

This video shows you in simple steps how to install a FireAngel ST-620 smoke alarm

FireAngel ST-620 vs ST-622 differences with reviews ..detects slow Tamper-proof battery does not need to be replaced for the life of the 

The alarms have been designed to update many installations using FireAngel devices - making it the perfect for replacing ST-622, ST-620 and ST- 

Files to download. The ST‑620 manual contains everything you need to install the product correctly. If you have further queries or need advice 

Inside stuff - smoke/fire detector FireAngel ST-620. By Ligius December 07, 2013. Update: if you came here looking for a fix to the annoying beep I might 

Product Description. The groundbreaking Thermoptek technology in the ST-620 provides responsiveness to all fire types in one alarm and removes the need for 

Replace your old FireAngel ST-620 smoke alarm with the FireAngel FA6620-R. No requirement to drill any more holes in your ceiling or redecorate.

I have a faulty smoke alarm and she has organised for a replacement to be sent out Problem with ST620, intermittent low battery warning very efficiently 

Replace your end of life ST-620 alarm with a FireAngel FA6615-R Optical Smoke Alarm with 5 year replaceable batteries or FireAngel FA6620-R Optical Smoke Alarm with 10 year sealed for