Please note our offices and warehouses will be closed from 24th December until 2nd January 2025.
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 FireAngel HM-SN-1 is a state-of-the-art heat alarm designed specifically for kitchens and garages. It employs advanced Thermistek heat sensing technology for quick response to rapid temperature rises, minimizing false alarms commonly triggered by smoke detectors in these areas. Key features include a large, easily accessible test and silence button, a long-lasting 10-year sealed battery, and a convenient 'Sleep Easy' function to temporarily silence low battery warnings. This alarm ensures heightened safety and reliability, making it an essential component of any home fire safety system.
| Product Dimensions | 141.5mm (diameter) x 53mm (depth) |
| Supply Voltage | 230V AC, 50Hz |
| Battery Back-up | 10 year sealed for life lithium battery |
| Technology | Thermistek |
| Alarm Sound Level | 85dB(A) at 3m (minimum) |
| Installation Positions | Ceiling, Class A1 |
| Alarms at Temperature Range | +54°C to +65°C |
| Operating Temperature | +4°C to +38°C |
| Operating Humidity | Up to 90% RH non-condensing |
| Storage Temperature | -20°C to +60°C |
| Storage Humidity | Up to 93% RH non-condensing |
| Plastic Material | ABS, UL94 VO fire retardant |
| Warranty | 5 years |
| Master Pack Quantity | 4 |
| Weight | 229g |
| Certification | BS 5446-2: 2003 |
| Maximum Number of Connected Units | 30 hardwired units |
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.
What makes the FireAngel HM-SN-1 heat alarm ideal for kitchens and garages?
The FireAngel HM-SN-1 is equipped with Thermistek heat sensing technology, which quickly responds to rapid temperature increases, making it ideal for environments like kitchens and garages where smoke detectors can give false alarms due to cooking fumes or dust.
How does the 'Sleep Easy' function of the FireAngel HM-SN-1 work?
The 'Sleep Easy' function allows users to temporarily silence low battery warnings for 8 hours, ensuring undisturbed rest. This feature is particularly useful for addressing low battery chirps during the night, allowing for battery replacement at a more convenient time.
Does the FireAngel HM-SN-1 heat alarm require regular battery replacement?
No, the FireAngel HM-SN-1 comes with a sealed 10-year battery, ensuring long-lasting performance and eliminating the need for frequent battery replacements. This feature provides a decade of peace of mind with minimal maintenance.
How can I test and maintain the FireAngel HM-SN-1 heat alarm?
The alarm features a large and easily accessible test and silence button. Regular testing is recommended to ensure proper functioning. The alarm can be tested by pressing the test button, and any nuisance alarms can be silenced using the same button. Maintenance includes periodic cleaning to remove dust or debris from the alarm's exterior.
