Professional duct smoke detector installation across Toronto and the GTA. We supply, install, wire, and test HVAC duct-mounted smoke detectors so your building meets Ontario fire code and passes inspection.
Duct smoke detectors automatically shut down HVAC fans and air handlers when smoke is detected in the airflow, stopping smoke from spreading through the ductwork to the rest of the building. Our licensed electricians handle every duct smoke detector installation in Toronto to Electrical Safety Authority (ESA) and fire code standards — from new HVAC systems to code-compliance retrofits.
Licensed & ESA-Registered Electricians
Fire Code Compliant Installation & Testing
The Duct Smoke Detector We Install: System Sensor D4120 InnovairFlex
For most duct smoke detector installation in Toronto, we fit the System Sensor D4120 InnovairFlex 4-Wire Photoelectric Duct Smoke Detector. It is a widely specified, code-listed unit built for real HVAC conditions — sensing smoke in airflow speeds from 100 to 4,000 ft/min across a wide temperature and humidity range.
The D4120 uses a plug-in photoelectric sensor head for better false-alarm immunity and easy maintenance, a housing with generous wiring space and built-in short-circuit protection, and three DIP switches for field-selectable settings. Its multi-voltage 4-wire design lets it work as part of a conventional fire alarm system or as a stand-alone HVAC shutdown device. The detector is manufactured by System Sensor, a Honeywell brand.
Why Duct Smoke Detector Installation Matters
When smoke enters a building’s ductwork, the HVAC system can rapidly circulate it through every connected space. A properly installed duct smoke detector samples the air inside the duct and, on detecting smoke, shuts down the fan and signals the fire alarm panel. This limits smoke spread, protects occupants, and is required for many commercial and multi-unit HVAC systems under the Ontario Building Code and NFPA 90A.
Our Toronto Installation Process
Our licensed, ESA-registered electricians assess your HVAC layout, size and position each detector on the supply or return duct, wire it back to the fire panel or HVAC controls with the correct fan-shutdown interlock, and fully test airflow sampling, alarm relays, and shutdown before completion. Every duct smoke detector installation in Toronto we perform is done to code and ready for inspection.
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Every install meets Ontario fire code and ESA wiring standards, including the required HVAC fan-shutdown interlock.
We most commonly install the reliable System Sensor D4120 InnovairFlex 4-wire photoelectric duct smoke detector.
We test airflow sampling, alarm relays, and fan shutdown before we leave the site — so you know it works.
Yes. Under NFPA 90A and the Ontario Building Code, HVAC air-handling systems moving more than 2,000 CFM generally require a duct smoke detector that automatically shuts the fan down when smoke is detected in the airflow. Our duct smoke detector installation in Toronto is done to these standards so your system passes inspection.
We most commonly install the System Sensor D4120 InnovairFlex 4-Wire Photoelectric Duct Smoke Detector — a proven, code-listed unit with a plug-in photoelectric sensor head, built-in short-circuit protection, and field-selectable DIP switch settings.
Sampling tubes draw a portion of the air moving through the duct across a photoelectric sensor. If smoke is present, the detector signals the fire alarm panel and shuts down the HVAC fan, preventing smoke from being circulated through the ductwork to the rest of the building.
Detectors are mounted on the supply and/or return air ducts, typically downstream of any filters and ahead of any branch connections, so the sampling tubes span the full width of the duct. We size and position each unit per the manufacturer and code requirements.
Yes. Duct detectors should be tested and cleaned periodically to keep the sensor and sampling tubes free of dust. We verify airflow, alarm relays, and fan shutdown at installation and offer ongoing testing and maintenance.
Cost depends on the number of detectors, duct size, and wiring back to the fire panel or HVAC controls. Call 416-838-9006 for a free, no-obligation quote for your duct smoke detector installation in Toronto.
We currently employ a team of fully qualified electricians and a number of apprentices. We have been registered with he ESA/ECRA and therefore all our electricians are Licensed and registered. Our aim is to keep our services high and our prices very competitive.
Need Duct Smoke Detector
Installation in
Toronto?
Get code-compliant duct smoke detector installation and testing from licensed, ESA-registered electricians. Call today for a free estimate!