Ademco Inc. HD6135FB Hardwired Heat Alarm 135F Rate-of-rise

Product Description

The ADEMCO INC. HD6135FB is a hardwired heat alarm designed for residential and light commercial fire detection applications. It operates on 120V AC with a 9-volt battery backup to maintain protection during a power outage. The unit uses a thermistor heat sensor and triggers at a fixed threshold of 135 degrees F. It also incorporates rate-of-rise detection, which allows the microprocessor to sound an alarm when it senses a temperature increase of a set number of degrees per minute before the fixed threshold is reached. This dual-detection approach enables a faster response to developing fire conditions. Licensed electricians or qualified alarm technicians typically handle installation.

This heat alarm is suited for areas where smoke alarms are not recommended, such as kitchens, garages, attics, and utility rooms, where cooking vapors, dust, or exhaust fumes could cause nuisance trips on a standard smoke detector. The hardwired design with battery backup makes it appropriate for new construction and retrofit projects requiring a reliable, always-on heat detection device. It ships in a package quantity of 12 units, making it practical for multi-unit or whole-home installations.

Key Features

• Rate-of-rise detection alarms before the 135 degrees F fixed threshold is reached, enabling faster fire response
• Thermistor heat sensor provides reliable temperature measurement
• 120V AC hardwired operation with 9-volt battery backup for continued protection during power loss
• Latching alarm indicator identifies which unit in an interconnected system initiated the alarm
• Low-battery chirp silence function suppresses the chirp for up to eight hours
• Nuisance alarm silence feature allows temporary suppression of unwanted alarms

Compatibility

Designed as a hardwired heat alarm compatible with standard 120V AC residential and light commercial detection circuits. Sold under BRK and First Alert product lines as noted in product documentation.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NFPA 72 and applicable local codes. Disconnect power at the breaker before wiring to avoid shock hazard. Follow the manufacturer wiring diagram for line voltage and interconnect connections. Do not install in locations where ambient temperatures regularly exceed the rated detection threshold, as this may cause nuisance alarms.

Technical Specifications

• Operating Voltage: 120V AC/DC
• Battery Backup: 9 volts
• Fixed Heat Threshold: 135 degrees F
• Detection Type: Fixed temperature and rate-of-rise
• Sensor Type: Thermistor
• Package Quantity: 12 EA
• Weight: 8.07 pounds

Standard Information

• Brand: ADEMCO INC.
• Manufacturer Part Number: HD6135FB