Kidde Firex KF3 Mains Heat Alarm 230V with Battery Backup (New Old Stock)

£19.95 £23.94 Inc VAT

Do you need an exact replacement for your old fire alarm system? This Kidde Firex KF3 Mains Heat Alarm is genuine New Old Stock (NOS). It is brand new, unused, and still in its original packaging. Therefore, you can swap it out quickly without rewiring your old base. Stock is highly limited.

7 in stock

Estimated Standard Delivery Jun 1, 2026 - Jun 2, 2026

Description

Kidde Firex KF3 Mains Heat Alarm 230V with Battery Backup (New Old Stock)

Finding a matching unit is very hard because Kidde stopped making the Firex KF3 heat alarm. However, a faulty alarm leaves your home unprotected.
Fortunately, we found a small batch of genuine, brand-new, old stock (NOS) Firex KF3 units. These alarms are pristine and completely unused. Furthermore, we ship them in their original factory boxes.
Why Buy New Old Stock (NOS) Firex KF3?
  • No Extra Wiring: First, this unit fits directly onto your current baseplate. Consequently, you do not need an electrician to change the mounting plate.
  • Keep Your System Safe: Second, this unit links seamlessly with your existing Firex smoke network. Thus, your entire home system stays uniform.
  • Perfect for Kitchens: Finally, this alarm triggers at 57°C. So, cooking fumes, steam, and dust will not cause false alarms.
Key Features & Specs:
  • Power Source: 230V mains-powered hardwired unit.
  • Battery Backup: Standard 9V alkaline battery is inside the box. Note: We recommend a fresh battery due to storage age.
  • Interlinked: Connects easily with up to 36 Firex or Kidde alarms.
  • Test & Hush: One button lets you check function or quiet a false alarm.
  • Condition: New Old Stock (NOS) in sealed box packaging.
Please Note: Kidde discontinued this line. For that reason, the original maker warranty may be expired. However, we fully guarantee that this unit works when it arrives.