Smoke & Heat Alarms
Buy domestic smoke alarms, heat alarms and carbon monoxide (CO) alarms for homes, rented properties and HMOs. Optical smoke alarms are the usual choice for living rooms, hallways and landings, while heat alarms are fitted in kitchens, where cooking fumes would set...
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About Smoke & Heat Alarms
Buy domestic smoke alarms, heat alarms and carbon monoxide (CO) alarms for homes, rented properties and HMOs. Optical smoke alarms are the usual choice for living rooms, hallways and landings, while heat alarms are fitted in kitchens, where cooking fumes would set off a smoke alarm. Choose mains powered smoke alarms with battery back-up, 10 year battery smoke alarms or interlinked smoke alarms that all sound together, plus combined and multi-sensor alarms and the bases and modules to complete a system. Smoke alarms should comply with BS EN 14604 and heat alarms with BS 5446-2; our heat alarm guide explains where and why to fit one.
Mains smoke alarms and wired smoke alarms
A mains smoke alarm, often called a wired smoke alarm or hard-wired smoke alarm, is connected to the property's mains electricity supply and has a back-up battery that keeps it working during a power cut. Mains alarms are normally interlinked, by cable or by radio, so every alarm in the home sounds together. Popular mains-powered optical smoke alarms include the Aico Ei3016 and Aico Ei146e, the Hispec Fast Fix HSSA/PE/FF and Hispec PULSE HSSA/OP/10, the FireAngel SW1-PF-T with push-fit base, the Kidde KF20R and the FireHawk FHN250RB. Back-up batteries vary by model, from 9V and alkaline to rechargeable and 10-year lithium cells.
Smoke, heat and CO alarms we stock
- Mains smoke and heat alarms – Aico Ei3000 series (Ei3014) and Ei140e series, Hispec Fast Fix and PULSE, FireHawk FHN, FireAngel push-fit (HW1-PF-T), Kidde KF20 and KF30, and Wisualarm mains alarms.
- Battery smoke and heat alarms – 10-year longlife battery alarms from Aico, FireHawk, Hispec, Espire, Honeywell Home, FireAngel Specification, X-Sense and Firechief, plus 9V models.
- Radio-interlinked alarms – Aico RadioLINK+ (Ei650iRF), Hispec RF PRO alarms and kits (2 smoke & 1 heat kit), FireAngel Smart RF, FireHawk RF-LINK, Honeywell Home R200 (R200S-N1), Wisualarm and Lumi-Plugin fire-rated downlights with built-in alarms.
- Combined and multi-sensor alarms – combined smoke and heat alarms (Hispec PULSE HSSA/OH/10), combined heat and CO alarms (Aico Ei3028), combined smoke and CO alarms (FireAngel SCB10-R) and multi-sensor fire and CO alarms such as the Aico Ei3030.
- Carbon monoxide alarms – 10-year battery and mains CO alarms from Aico (Ei208, Ei3018), FireAngel, Hispec, FireHawk, Honeywell Home, Wisualarm, X-Sense, Espire and Firechief, including radio-interlinked models such as the Aico Ei208WRF, Hispec RF PRO, FireHawk RF-LINK and Honeywell Home R200C-N1. For commercial and panel CO detectors see Carbon Monoxide Detectors.
- Bases, modules and accessories – RadioLINK bases (Ei168RC), relay and switched input modules, controllers, gateways (FireAngel FS1580W2-T), kits for the deaf and hard of hearing (Aico Ei170RF) and fitting accessories.
How to choose a smoke or heat alarm
- Smoke or heat. Optical smoke alarms suit hallways, landings and living areas. Heat alarms suit kitchens and areas where fumes, steam or dust would cause false alarms.
- Mains or battery. Mains alarms with battery back-up are hard-wired, usually in new builds and rewires. Sealed 10-year battery alarms are quick to fit where new wiring is not practical.
- Interlinking. Interlinked alarms all sound together, so a fire anywhere is heard throughout the property. Radio-interlinking avoids interconnect cables, but alarms only link with compatible models from the same range.
Why buy from JEM Systems UK
JEM Systems UK supplies genuine Aico, FireAngel, Hispec and FireHawk alarms, all brand new and factory sealed, to trade installers across the UK. Every order ships with fast, tracked UK delivery.
Smoke and heat alarm FAQs
Where should a heat alarm be fitted?
Heat alarms are normally ceiling-mounted in kitchens, and sometimes garages, where a smoke alarm would false alarm. They should be interlinked with the smoke alarms so every alarm sounds.
At what temperature does a heat alarm go off?
Most domestic heat alarms use a fixed-temperature sensor that triggers at around 58°C. Check the datasheet for the exact figure.
Can I mix brands on an interlinked system?
Generally no. Hard-wired and radio interlink signals are manufacturer-specific, so use alarms, bases and modules from the same compatible range.
Do mains smoke alarms need a battery?
Yes. Every mains smoke alarm we sell has a back-up battery so it keeps working if the power fails. Depending on the model this is a replaceable 9V or alkaline battery, a rechargeable cell or a sealed lithium battery. Check the product title for the type.
Who should install a wired smoke alarm?
Because a wired smoke alarm connects to the mains supply, it should be installed by a qualified electrician. Sealed 10-year battery alarms are an alternative where new wiring is not practical.
Guides: BS 5839-6 domestic alarm grades and categories, why is my fire alarm beeping, how to test smoke alarms