First Alert HD6135FB Hardwire Heat Alarm With Battery Backup

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The unit alarms if either the temperature reaches 135 degrees Fahrenheit or the temperature rises more than 15 degrees Fahrenheit in one minute. Ideal for garages and crawl spaces.
SKU: 40855986
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  • 120-volt AC/DC with 9-volt battery backup
  • 135 degrees Fahrenheit fixed rate and rate-of-rise temperature sensing
  • Microprocessor controlled for fewer nuisance alarms
  • The test/silence button both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality
  • Latching alarm indicator which automatically identifies which unit initiated the alarm
  • 120-volt AC inter-connectable (with maximum 18 compatible devices)
  • 85-decibel horn
  • Meets UL requirements


SKU: 40855986
UPC: 029054508102
Brand: First Alert