The Kidde HD135 is a 120VAC hardwired heat alarm that responds to temperature rather than smoke, triggering at 135 degrees F. Ideal for garages, kitchens, utility rooms, and other areas where smoke alarms would generate frequent false alarms. Interconnectable with up to 24 Kidde devices (18 initiating). Includes 9V battery backup for continued protection during power outages. UL listed with 5-year limited warranty.
Why use a heat alarm instead of a smoke alarm in the garage?
Garages, kitchens, and workshops generate exhaust fumes, dust, and cooking steam that frequently trigger smoke alarm nuisance alarms. A heat alarm responds only to elevated temperature (135 F), dramatically reducing false activations in these environments.
At what temperature does the HD135 trigger?
The HD135 is a fixed-temperature heat alarm that activates when ambient temperature reaches 135 degrees F. It does not have a rate-of-rise feature.
Can the HD135 interconnect with smoke alarms?
Yes. The HD135 interconnects with up to 24 Kidde devices, of which 18 can be initiating (smoke, heat, CO, etc.). When the heat alarm triggers, all interconnected alarms will sound throughout the home.
Does the HD135 work during a power outage?
Yes. The 9V battery backup provides continued protection when AC power is unavailable.
# Kidde HD135 Heat Alarm, 120VAC Hardwired with 9V Battery Backup **Model:** `HD135` **Brand:** Kidde **Category:** Heat Alarm > The Kidde HD135 is a 120VAC hardwired heat alarm that responds to temperature rather than smoke, triggering at 135 degrees F. Ideal for garages, kitchens, utility rooms, and other areas where smoke alarms would generate frequent false alarms. Interconnectable with up to 24 Kidde devices (18 initiating). Includes 9V battery backup for continued protection during power outages. UL listed with 5-year limited warranty. ## Specifications | Attribute | Value | |---|---| | Product Type | Heat Alarm | | Trigger Temp F | 135 | | Power Source | hardwired-ac | | Voltage | 120V AC | | Battery Backup | Yes | | Battery Type | 9V | | Interconnect | Yes | | Max Interconnect Devices | 24 | | Max Initiating Devices | 18 | | Visual Indicator | flashing red LED | | Test Button | Yes | | Ul Listing | UL 521 | | Warranty Years | 5 | | Placement | garage, kitchen, attic, utility room | ## What's Included - alarm unit - mounting hardware - wire harness Source: https://www.jaspecs.com/kidde/heat-alarm/hd135-kidde-heat-alarm-hardwired/