Free checklist
Duct smoke detector annual maintenance checklist
The annual duct smoke detector service is the deep pass: the measurements, cleanings and tests a quarterly round doesn't reach. This checklist keeps the full service on record with the photos that make it defensible later. Work is commonly verified against NFPA 72, NFPA 90A. Confirm the edition your authority having jurisdiction has adopted.
- Items
- 5
- Photos required
- 7
- Built for
- Subcontractors
Who runs it
The facilities lead attending with the fire alarm technician and the HVAC tech, recording what happens when the detector is actuated, while the technician performs the code-required test.
When in the schedule
Once a year, coordinated so the air handler can be run and shut down for the test and the monitoring station is on test before the detector is actuated.
The checklist
Every item, and the photo that proves it
The photo count on each row is what RTI would require before the item can be submitted. Copy the list as is, or load it into RTI and let the gate enforce it.
Actuation observed
- 2 photos
Functional actuation witnessed at the detector
Detector actuated by the technician with the manufacturer's test method or introduced smoke, alarm LED seen latching and the correct point annunciating.
- 1 photo
Sampling proven under airflow where the method requires it
Actuation performed with the fan running where the test method calls for it, so the detector is proven to sense in moving air and not just at a dead magnet contact.
Fan shutdown and reset
- 2 photos
HVAC fan-shutdown interface observed on actuation
Supply or return fan seen shutting down and any associated damper moving to its safe position when the detector actuates, matching the sequence of operation.
- 1 photo
Detector and unit restored after the test
Detector reset from the remote station, panel returned to normal, air handler restarted and confirmed running in auto rather than left in hand.
Documentation
- 1 photo
Results recorded on the building side
Which detectors were actuated, the fan-shutdown result and any deficiency the technician calls out logged with a photo and a date on the site record.
What usually sends this back
The failures are almost always the evidence, not the work
- Detector actuated and the panel signal confirmed, but nobody watches the air handler to see the supply fan actually drop out, so a broken shutdown interface passes.
- Magnet test used as a proof of smoke sensing when it only proves the circuit, so a fouled sensing chamber that won't respond to real smoke still gets logged good.
- Fan shut down on the test but the damper interlock and the restart-after-reset never watched, so the unit doesn't come back cleanly and gets left in hand.
Run it with the Photo Gate
A checklist nobody can submit half-finished
Load this list into RTI, stick a QR tag on the area it covers, and the submit button stays locked until every mandatory item is answered and the 7 required photos exist. Approved walks roll into a branded turnover package with a tamper-evident record behind every line.
Submission state
The gate is enforced on the server, so it holds even if the phone is offline when the walk happens.
Common questions
- What does this duct smoke detector annual checklist cover?
- 5 items across 3 sections, covering actuation observed, fan shutdown and reset, documentation. Each item spells out what the person walking the job is actually looking for, not just a box to tick.
- Who should run this inspection?
- The facilities lead attending with the fire alarm technician and the HVAC tech, recording what happens when the detector is actuated, while the technician performs the code-required test.
- When in the schedule should this walk happen?
- Once a year, coordinated so the air handler can be run and shut down for the test and the monitoring station is on test before the detector is actuated.
- Why does every item ask for a photo?
- 7 of the 5 items call for photo evidence. A checklist answer without the photo is a claim; the photo is what makes the record worth something in a dispute and lets a reviewer approve work without re-walking the job.
- What most often fails a duct smoke detector annual inspection?
- Detector actuated and the panel signal confirmed, but nobody watches the air handler to see the supply fan actually drop out, so a broken shutdown interface passes. Magnet test used as a proof of smoke sensing when it only proves the circuit, so a fouled sensing chamber that won't respond to real smoke still gets logged good. Fan shut down on the test but the damper interlock and the restart-after-reset never watched, so the unit doesn't come back cleanly and gets left in hand.
- Can I use this checklist in RTI?
- Yes. Start a free RTI workspace, build this list as a checklist, and the Photo Gate holds the submit button until every mandatory item is answered and its photos are attached. Approved inspections roll into a branded turnover package with a tamper-evident audit trail.
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