Kidde | Intelligent Fixed Temperature & Rate-of-Rise Heat Detector, Rotary-Addressed | KIR-HD

The KIR-HD is a dual-sensing intelligent heat detector that monitors for both rapid temperature spikes and sustained high heat on the same SLC loop point. Rate-of-rise detection catches fast-moving fire conditions (triggers at 15°F/min), while the fixed-temperature element activates at 135°F for slower-developing heat events. One detector covers both scenarios, reducing device count and loop loading on Kidde intelligent fire alarm systems.

Built for the commercial fire installer

Rotary-addressed with 160 available addresses (0-159) set by screwdriver - no programming tool or laptop required. Mount the detector on any compatible KI-series base, set the address, and the panel picks it up on the next SLC poll. Low current draw (51 µA standby, 68 µA alarm) keeps loop capacity available for larger systems. Automatic environmental compensation adjusts sensitivity to ambient temperature changes, reducing nuisance alarms in spaces with HVAC cycling or seasonal temperature swings.

Key advantages

• Dual-sensing in one device: fixed temperature (135°F ULI / 140°F ULC) and rate-of-rise (15°F/min) detection on a single SLC address
• Rotary addressing (0-159): set with a screwdriver, no programming tool needed
• Low SLC current draw: 51 µA normal, 68 µA alarm - maximizes available loop capacity
• Automatic environmental compensation: reduces false alarms from ambient temperature fluctuations
• Eight compatible base types: standard, 4-inch, relay, fault isolator, and audible sounder options
• UL 521 and ULC listed: meets UL 521, ULC-S530-M91, and CAN/ULC S524-01

System requirements

Requires a Kidde intelligent fire alarm control panel with SLC loop capability. Mounts on any compatible KI-series base (sold separately). Standard bases fit single-gang boxes; 4-inch bases with trim skirts cover standard 4-inch square electrical boxes. Accepts #12 to #18 AWG wiring.