CACF: Central Alarm and Control Facility

Last updated: September 2026

What a CACF is

The room the fire department works from. Not the electrical room, not wherever there was space on a wall. It is the place where an incident commander stands and runs the building: makes announcements, watches which zone is in alarm, sees where the elevators went, releases door hold opens, and silences what needs silencing.

The clue is in the second word. It is a facility, meaning a location with a defined content, not a piece of equipment. A control unit, an annunciator and a voice communication console can all be inside it, and none of them is the CACF by itself.

Where the Ontario requirement comes from, precisely

Article 3.2.6.7 is titled Central Alarm and Control Facility. We are confident of the number and the title because Ontario's own study guides for the 2024 Building Code examinations list it that way, in the Detection, Lighting and Power syllabus. The same syllabus confirms 3.2.6.8 Voice Communication System immediately after it.

Two things follow from where that article sits.

First, it is in Subsection 3.2.6, so the CACF requirement is triggered by whatever brings a building into that subsection, not by the presence of a fire alarm system. Most buildings in Ontario have a fire alarm system and no CACF, and that is correct.

Second, Subsection 3.2.6 is the trigger for the longest emergency power duration in the code. A building within that subsection needs its fire alarm emergency power to carry full load for 2 hours, against 30 minutes for a building not otherwise listed. See standby power.

What has to be inside it, and how confident we are

Here is the honest position. We could not open the operative verbatim text of Article 3.2.6.7 from a free official source. The free 2024 Building Code Compendium is the place to read it and you should read it there before designing to it.

What we did read is an unofficial online reproduction of an earlier consolidation of the Ontario Building Code. Treated as indicative of subject matter only, it describes the facility as required to be readily accessible to firefighters entering the building, sited with background noise in mind, and containing: voice communication controls for all speakers, individual floor areas and exit stairs; alert and alarm indication with silencing; visual indication of elevator emergency recall status; an annunciator; the means of transmitting signals to the fire department; controls for vestibule door hold open devices; zone by zone manual alarm actuation; auxiliary equipment controls; two way elevator car communication; individual sprinkler waterflow indication; and sprinkler and standpipe supervisory and trouble indication with a silencing switch.

Do not lift the cross reference numbers out of that list. It points at the annunciator article as 3.2.4.9 and the fire department signal article as 3.2.4.8. In the 2024 Building Code the annunciator article is 3.2.4.8, confirmed independently from the Ontario syllabus. The numbering shifted between editions, which is exactly the trap the CAN/ULC edition tracker exists to catch, and it applies to code articles as much as to standards.

In the field

The CACF is where the design decisions of half a dozen trades land in one room, and it is normally the last thing finished. Elevator recall status, two way communication, sprinkler supervisory points and the voice system all have to be present and working together, which is why integrated testing tends to be scheduled around it.

Once the building is occupied, the Fire Code takes over: the fire alarm and voice systems in that room are inspected and tested to CAN/ULC-S536 like the rest of the installation, and the results are the owner's records.

Terms next to this one

The voice communication system is the equipment; the CACF is where its controls live. A transponder elsewhere in the building is part of the same control unit and reports back here.

What we could not verify

We have not confirmed the title or scope statement of Subsection 3.2.6 itself from a free official Ontario source, so we do not state which buildings it captures. The common shorthand is high buildings. Confirm it in the Compendium, and confirm the operative text of 3.2.6.7 there too, before it goes into a code review or a compliance document.

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