Intelligent fixed temperature heat detector
Kidde Commercial

Intelligent fixed temperature heat detector

SKU KD-KI-HFD

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The KI-HFD is an addressable fixed-temperature heat detector for the Kidde Intelligent Series, built for kitchens, mechanical rooms, and shower rooms where ambient heat and steam rule out smoke detection.

Built for the commercial installer

A twist-and-lock head speeds installation and service, and the detector shares its base address so no separate address is consumed. On-board self-diagnostics store test history for reporting, and a dual-color LED gives an at-a-glance normal/alarm indication from the floor.

Key features

  • 135°F (57°C) fixed-temperature alarm threshold for fast, flaming-fire detection
  • Twist-and-lock detector head for quick installation and base swaps
  • Compatible with B4U, RB4U, IB4U, and SB4U bases for standard, relay, isolator, or audible applications
  • Comprehensive self-diagnostics with on-board storage of test results
  • UL 521 and ULC-S530 listed for commercial fire alarm systems

System requirements

Requires a compatible Kidde VS or VM Series intelligent control panel and a B4U-family detector base (ordered separately).

Specifications

SKUKD-KI-HFD
BrandKidde Commercial
Form factorAddressable fixed-temperature heat detector head, twist-and-lock
CommunicationAnalog addressable SLC loop, Kidde VS/VM control systems
Fixed-temp alarm rating135°F (57°C); 140°F (60°C) ULC
Operating voltage15.2 to 19.95 VDC
Maximum spacing50 ft (15 m) centers
Compatible basesB4U Standard, RB4U Relay, IB4U Isolator, SB4U Audible
Operating temp32°F to 100°F (0°C to 38°C)
Operating humidity0 to 93% RH, noncondensing
ComplianceUL 521, ULC-S530-M91, NFPA 72, CAN/ULC S524-01

Documents and resources

FAQs

Does the KI-HFD work in kitchens and shower rooms?
Yes. As a heat-only detector it ignores steam and cooking aerosols that would false-alarm a smoke detector, while still responding to a 135°F fixed-temperature rise.
What base does the KI-HFD require?
Any B4U-family base: B4U standard, RB4U relay, IB4U isolator, or SB4U audible. The detector shares the base's address, so no extra address is used.
What panel is this compatible with?
Kidde VS and VM Series intelligent fire alarm control panels.
All Kidde Commercial