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In-stock orders placed before 4:30pm on Friday 20th December should arrive before Christmas on a Next Working Day Delivery service. We are unable to guarantee this, however, as we rely on external couriers. Orders placed after this time will be processed and despatched as normal, but we cannot guarantee a pre-Christmas delivery. Any orders placed on Tuesday 24th December, or during the festive period, will be delivered in the first working days of the new year.
We recommend you place your order early, and look forward to serving you again in 2025.
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The Kidde KF30 is a mains-powered heat alarm that offers a reliable solution for detecting rapid temperature rise in high-risk areas like kitchens or garages. It's designed to interlink with up to 23 other alarms, ensuring immediate and wide-ranging alert in case of danger. This alarm is ideal for maintaining continuous vigilance against fire threats in homes.
Mains-powered heat alarm that can be interlinked with up to 23 other Kidde mains alarms, be they ionisation, optical or heat.
Once interlinked, the detection of the relevant danger by an individual unit will sound across all the connected alarms.
Mains-powered heat alarms can be used throughout the home in humid or dusty environments where an optical or ionisation smoke alarm is unsuitable, e.g. kitchens, loft spaces and garages.
The Firex range requires installation by a professionally qualified electrician and complies with UK Building Regulations for new housing and associated standards (Grade D BS 5839, Part 6).
| Model | KF30 |
| Power Supply | 230V mains-powered with 9V Alkaline battery back-up |
| Temperature Range | 0ºC to + 40ºC |
| Humidity Range | Up to 93% RH non-condensing |
| Storage and Transport | -20ºC to +60ºC and 5–95% RH non-condensing |
| Bracket Dimensions | 127 x 127 x 39mm |
| Alarm Dimensions | 133 x 133 x 6mm |
| Alarm Weight | 213g |
| Warranty | 6 years |
| Approvals | BSI certified to BS5446 Part 2: 2003, CE tested and certified |
| Sensor | Thermistor within detection unit |
| Button Test | Simulates heat at the sensor, checks electronics and sounder |
| Automatic Self-test | Circuitry is tested, unit chirps if fault is detected |
| Supply Voltage | 230V AC, 50 Hz |
| Power Consumption | |
| Connection | Push-in/snap-fit connector with 150mm leads |
| Battery Back-up | User replaceable 9V battery (522/6LR61) |
| Power-on Indicator | Continuous green LED |
| Alarm Sounder | Electronic piezo-electric, T3 pattern sound |
| Sound Output | 85dB (A) minimum at 3 metres |
| Alarm Frequency | 3.2 kHz typical |
| Alarm Status | Red LED flashes for normal operation and sensing heat |
| Interconnection | Up to 24 Firex and Kidde units can be hardwire interconnected |
| Optional Controls | Wired Remote Test and Hush Unit |
| Optional Pattresses | SMK23RU with switchable relay, SMK4896 – Surface mounting base |
| Fixing | Mounting bracket ring with two 'T' slot fitting, 57mm to 90mm screw fittings |
| Plastics used | NORYL for cover, body and mounting bracket |
| Lead-Free Status | All Firex alarms are lead-free |
Wondering which smoke alarm you need?
Our Smoke and Gas Detectors Buying Guide has a wealth of information to help you decide which Smoke Alarms to buy, plus installation tips, maintenance advice, and guidance on certification standards and relevant regulations to be aware of.
How is the Kidde KF30 powered?
The KF30 is mains-powered with a 9V alkaline battery backup, ensuring continuous operation even during power outages.
Can the Kidde KF30 be interconnected with other alarms?
Yes, the KF30 can be interconnected with up to 24 Firex and Kidde 'Slick' units, allowing for a comprehensive fire safety system throughout your home or property.
What warranty comes with the Kidde KF30?
The KF30 comes with a 6-year warranty, providing long-term reliability and peace of mind for users.
Is the KF30 suitable for all areas of my home?
The KF30 is specifically a heat alarm, making it most suitable for kitchens and garages where there is a higher risk of rapid temperature rise, rather than areas where smoke detection is preferable.
