FireHawk FHN250RB Mains Optical RF-Link Smoke Alarm with Rechargeable Lithium Battery Backup | FHN250RB

Grade D1 Mains-Powered Optical Smoke Alarm with Rechargeable Battery Backup

The FireHawk FHN250RB is a mains-powered optical multi-sensor smoke alarm featuring an integrated rechargeable lithium battery backup, providing continued protection in the event of a mains power failure.

Designed for domestic fire detection, the alarm incorporates FireHawk's X-Profile optical detection chamber together with TSE Thermal Stability Enhancement technology. This combination is designed to improve detection performance across changing environmental conditions while helping reduce nuisance alarms.

The FHN250RB is suitable for applications including bedrooms, hallways, landings and living areas and provides Grade D1 guidance to BS 5839-6:2019. It is also compatible with FireHawk's RF-Link system when fitted with the optional FHN600RF module.

Features

• Mains-Powered Optical Multi-Sensor Smoke Alarm
• Rechargeable Lithium Battery Backup
• Grade D1 Alarm
• Unique X-Profile Optical Detection Chamber
• TSE Thermal Stability Enhancement Technology
• Designed to Reduce Nuisance Alarms
• Energy-Saving Low Power Consumption
• Alarm Silence / Hush Function
• Low-Battery Warning Silence
• Low-Battery Chirp Can Be Silenced for up to 10 Hours
• Extra-Large Test Button
• RF-Link Compatible
• Optional FHN600RF Module Required for Wireless Interconnection
• Compatible with FireHawk RF-Link Smoke, Heat & CO Alarms
• Suitable for Bedrooms
• Suitable for Hallways & Landings
• Suitable for Living Areas
• EN 14604:2005 + AC:2008 Certified
• Grade D1 – BS 5839-6:2019 Guidance
• 10-Year Warranty

These features and certifications are specified by FireBlitz for the FHN250RB.

Rechargeable Lithium Battery Backup

Unlike the FHN250BB model with replaceable AAA backup batteries, the FHN250RB incorporates a rechargeable lithium battery backup.

The alarm is normally powered from the mains electrical supply, with the rechargeable battery providing backup protection if mains power is interrupted. This configuration provides Grade D1 guidance under BS 5839-6:2019.

X-Profile Optical Detection Chamber

The FHN250RB incorporates FireHawk's unique X-Profile detection chamber, controlled by bespoke software.

This optical detection technology is designed to provide reliable smoke detection for appropriate domestic locations such as bedrooms, living spaces, hallways and landings.

Thermal Stability Enhancement Technology

FireHawk's TSE – Thermal Stability Enhancement technology helps maintain alarm stability across a range of environmental conditions.

The technology is specifically designed to help reduce nuisance alarms while enhancing detection performance, making the FHN250RB suitable for everyday domestic fire protection.

Optional RF-Link Wireless Interconnection

The FHN250RB can be upgraded for wireless interconnection by installing the separately available FHN600RF RF-Link module.

Once fitted, it can form part of a compatible FireHawk RF-Link system incorporating smoke alarms, heat alarms, carbon monoxide alarms and associated alarm accessories.

Compatible RF-Link products include the FHB10-RF smoke alarm, FHH10-RF heat alarm, CO10-RF carbon monoxide alarm and FHN800HIA hard-of-hearing alarm system.

Alarm Silence Function

The integrated alarm silence button provides a convenient way to temporarily silence the alarm during an identified non-emergency or nuisance alarm situation.

This helps make the alarm easier to manage without compromising its normal fire detection functionality.

Low-Battery Warning Silence

The FHN250RB allows a low-battery warning chirp to be silenced for up to 10 hours.

This is particularly useful if a warning occurs during sleeping hours, helping minimise disruption while maintaining continuous alarm protection.

Extra-Large Test Button

An extra-large test button provides convenient access for routine alarm testing.

Regular testing should be carried out in accordance with the manufacturer's instructions to help ensure the alarm remains operational.

• Brand: FireHawk
• Manufacturer: FireBlitz
• Model / Product Code: FHN250RB
• Product Type: Mains Optical Multi-Sensor Smoke Alarm
• Detection Technology: Optical
• Detection Chamber: X-Profile
• TSE Technology: Yes
• Primary Power: Mains
• Backup Power: Rechargeable Lithium Battery
• Grade: D1
• RF-Link Compatible: Yes
• RF-Link Module: FHN600RF – Sold Separately
• Alarm Silence: Yes
• Low-Battery Warning Silence: Up to 10 Hours
• Test Button: Yes – Extra Large
• Energy Saving: Low Power Consumption
• Diameter: 113mm
• Depth: 55mm
• Weight: 0.24kg
• Certification: EN 14604:2005 + AC:2008
• Guidance: Grade D1 – BS 5839-6:2019
• Warranty: 10 Years

FireBlitz lists the alarm at 11.3cm diameter × 5.5cm depth, with a weight of 0.24kg.

Suitable Applications

The FireHawk FHN250RB is designed for domestic fire detection applications including:

• Bedrooms
• Hallways
• Landings
• Living Rooms
• Living Areas
• Corridors
• Suitable Escape Routes

The manufacturer specifically categorises the FHN250RB for bedrooms, hallways and landings, and living areas.

Why Choose the FireHawk FHN250RB?

The FireHawk FHN250RB is a strong choice where a Grade D1 mains-powered smoke alarm with rechargeable battery backup is required.

Its combination of an X-Profile optical detection chamber, TSE technology, rechargeable lithium backup and 10-year warranty provides a low-maintenance solution for domestic fire protection.

Optional RF-Link compatibility also gives installers flexibility to incorporate the alarm into a wider FireHawk wireless interconnected alarm system where required.