First Alert HD6135FB Hardwired Heat Alarm with Battery Backup – 135°F

Protect spaces where smoke alarms do not fit

The First Alert HD6135FB hardwired heat alarm is designed for garages, crawl spaces, laundry rooms, and other areas where a standard smoke detector may not be suitable. It focuses on heat conditions to provide a practical alert when temperatures rise beyond safe levels.

How heat detection works

This model uses two reliable cues: a fixed 135 degrees Fahrenheit threshold and a rate of rise that activates after a 15 degree increase within one minute. A microprocessor helps keep nuisance alarms to a minimum while staying sensitive to real heat changes.

Power, reliability, and silence options

Powered by 120V AC with a 9V battery backup, it remains active during power interruptions. The unit can be tested and silenced using a simple test switch, and it integrates with remote controls for convenient operation in everyday living spaces.

• Interconnectable with up to 12 alarms and 6 devices for coordinated alerts
• Latching indicator shows which unit triggered the alarm
• 85 dB horn provides a clear audible warning across adjacent areas

Installation, control, and system scope

Easy to mount on a wall or ceiling with a straightforward mounting bracket, plus a battery drawer for quick changes. It can work with almost any standard household remote to help you mute non threatening alarms when appropriate.

What you get and practical uses

• One heat alarm and one 9V battery included
• User manual with installation guidance and routine testing steps

For real life scenarios, consider placing this heat alarm in spaces prone to heat buildup or rapid temperature changes such as attached garages, laundry rooms, kitchens, and crawl spaces. It is designed to blend safety with practical installation, offering potential early warnings without presuming outcomes.