Installers don't choose on specification alone. They choose on efficiency. The KF21 is engineered to reduce friction on every install – especially replacements. The Quick-Fit slide-on base aligns with 57-90mm back box spacing, covering most UK back box configurations without modification. No re-drilling. Drop it straight onto existing back boxes and move on.

The flared 150mm base plate covers existing fixing marks and surface staining left by previous alarms. No filler, no repainting, no cosmetic correction. A professional finish without the extra work. Integrated cable management keeps wiring secure and organised throughout installation. No separate pattress needed. Particularly valuable across multi-unit housing jobs where consistency matters.

KF21 is fully compatible with existing Kidde FIREX hardwired systems, including smoke, heat and CO alarms, allowing upgrades without changing system architecture.

Mains powered optical smoke detector complete with 10yr lithium sealed battery back- up,
suitable for all domestic housing installations.

This compact reddot design award winner at 97mm diameter has built in wireless RF interlink as standard
and up to 32 of the family range can be connected together.

It also is one of the easiest and quickest RF based detectors to install and setup!

High quality, reliable & fully compliant safety alarms. Individually tested to provide you peace of mind.

Safety alarms play a crucial role in safeguarding our homes and loved ones. Espire alarms are individually tested to guarantee reliability and are fully certified by the Loss Prevention Certification Board and TUV.

Espire uses tried and tested technology to provide users with enhanced, effective and reliable safety alarms. Espire alarms give users peace of mind, and the ability to respond swiftly to potential threats.