Ultra Slim Optical Smoke Alarm – Sealed 10-Year Battery

When smoke is detected, the FA6629S emits a loud, continuous 85dB alarm and displays a clear visual warning. The alarm continues until the air clears. Test regularly using the Test/Hush button to familiarise yourself with the sound.

Yes. A single press of the Test/Hush button performs a test at reduced volume. A longer press performs a full-volume test at 85dB.

Replace your end-of-life ST-622 or ST-620 with the FA6629S. It offers an advanced optical sensor, sealed 10-year battery, Night Mode, and Sleep Easy – all in an ultra-slim design that fits the same ceiling position.

No. The FA6629S is battery powered and designed for simple DIY installation. The base plate is secured with screws, and the alarm clicks into place with a clockwise twist. No wiring or electrician required.

No – this is a smoke alarm only and does not detect carbon monoxide. For CO protection, install a dedicated carbon monoxide alarm such as the FireAngel FA6829S alongside your smoke alarms. For combined protection in a single unit, consider the FireAngel SCB10-R combination smoke and CO alarm.

To safeguard elderly parents, read the FireAngel elderly solutions guide. Local Fire and Rescue Services can also perform free ‘Safe and Well’ checks for vulnerable occupiers. For maximum protection, consider the FireAngel Pro Connected range.

Test at least once a week by pressing the test button. Vacuum around the alarm every six months to remove dust. Your alarm will alert you with a low-battery chirp when the battery is running low. See our full smoke alarm testing guide for more detail.

In England, at least one smoke alarm is required on every storey used as living accommodation under the Smoke and Carbon Monoxide Alarm (England) Regulations 2015 (amended 2022). Scotland and Wales have their own requirements.