Heat Alarms 101: Your Complete Guide to Installation, Temperatures, Codes & Safety

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Why Install a Heat Alarm? Boost Fire Safety in Your Home

Increase fire safety in your home by installing a high-quality heat alarm. Unlike smoke alarms, heat alarms react to rapid temperature increases (not smoke), making them ideal for kitchens, garages, or dusty areas prone to false alarms.

What Temperature Triggers a Heat Alarm?

Most heat alarms activate at 135°F to 190°F (57°C to 88°C), depending on the model. This range ensures they detect significant heat from fires while ignoring minor temperature fluctuations.

Where Should You Install a Heat Alarm?

  • Place heat alarms in high-risk areas like kitchens, garages, or workshops where smoke alarms might trigger false alerts.
  • Install on the ceiling, away from direct heat sources (ovens, heaters), and follow the manufacturer’s guidelines for spacing.

Are Heat Alarms a Legal Requirement?

Legality varies by region, but heat alarms are often recommended (or required) in spaces where smoke alarms are unreliable. Check local building codes to ensure compliance.

Do Heat Alarms Work in Freezing Temperatures?

Yes! Most heat alarms operate in -20°F to +100°F (-29°C to +38°C), making them suitable for garages, sheds, or unheated spaces.

Can Heat Alarms Interconnect with Other Alarms?

Yes—interconnected systems are possible if all alarms are AC-compatible. This ensures full-home alerts during emergencies.

Battery vs. Hardwired Heat Alarms: Which Is Better?

  • Battery-powered alarms: Easy to install, ideal for retrofits or areas without wiring.
  • Hardwired alarms: More reliable (with battery backup) and often required by building codes for new constructions.
  • Always verify local regulations and manufacturer specs before choosing.
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