TL;DR: Under NFPA 105, which the International Fire Code references, each smoke damper needs a test one year after installation and then every four years. Buildings that contain a hospital can go six years between tests. NFPA 72 covers the smoke detectors and fire alarm signals that close the damper, and those detectors get tested every year.
In Colorado, smoke damper testing requirements come from NFPA 105, which the International Fire Code points to. Each smoke damper must be tested and inspected one year after installation, then every four years. Buildings that contain a hospital can go every six years. NFPA 72 covers the detectors and fire alarm signals that tell the damper to close.
That split matters. A damper can pass its own test and still fail in a fire if the duct detector or relay that commands it is dead. This guide covers how the two standards work together in Denver-area buildings, what a test looks like, and who is responsible for it.
What does a smoke damper do?
A smoke damper is a blade-style device in HVAC ductwork. It closes to stop smoke from moving through a smoke barrier. A fire damper is different: it closes on heat to hold back flame at a fire-rated wall or floor. Many buildings use combination fire/smoke dampers that do both jobs.
Smoke dampers usually close on a signal from a smoke detector or the fire alarm panel. According to NEBB, most life safety dampers are part of compartmentalization, which keeps fire and smoke from spreading during an emergency. Because they sit above ceilings and inside shafts, they are easy to forget. Rust, bent blades, loose linkages, and new ductwork from a remodel can all keep one from closing.
How often does code require smoke damper testing in Colorado?
Every smoke damper needs a test one year after installation, then every four years after that. In buildings that contain a hospital, the interval is every six years. These intervals come from NFPA 105, and fire dampers follow the same cycle under NFPA 80.
These standards become local law through the fire code. The International Fire Code requires dampers that protect duct and air transfer openings to be maintained under NFPA 80 and NFPA 105. The Colorado Division of Fire Prevention and Control lists the 2021 International Fire Code among its adopted codes for buildings under state oversight. Denver adopted the 2024 International Fire Code with local amendments, effective December 31, 2025. Cities like Aurora, Arvada, and Broomfield adopt their own code editions, so your local fire code official has the final word on schedules and paperwork. For the bigger picture, see our guide to Colorado State Fire Marshal requirements for commercial buildings.
Smoke control systems test more often
Some dampers belong to an engineered smoke control system, the kind used in high-rises, atriums, and some healthcare buildings. Those dampers run on a tighter schedule. NEBB notes that dampers in dedicated smoke control systems must be tested every six months, and dampers in non-dedicated systems once a year.
| Device | What it controls | Main standard | Periodic test interval |
|---|---|---|---|
| Fire damper | Flame through fire-rated walls and floors; closes on heat | NFPA 80 | 1 year after install, then every 4 years (6 in hospitals) |
| Smoke damper | Smoke through smoke barriers; closes on a detector or alarm signal | NFPA 105 | 1 year after install, then every 4 years (6 in hospitals) |
| Combination fire/smoke damper | Both flame and smoke | NFPA 80 and NFPA 105 | 1 year after install, then every 4 years (6 in hospitals) |
| Smoke control system damper | Smoke movement in an engineered smoke control system | NFPA 105 and NFPA 92 | Every 6 months (dedicated) or yearly (non-dedicated) |
| Duct or spot smoke detector that closes the damper | The signal that commands the damper | NFPA 72 | Annual test plus semi-annual visual check |
Where does NFPA 72 fit into smoke damper testing?
NFPA 72 does not set how often the damper gets tested. It covers the detection and fire alarm side that makes the damper move. According to Facilitiesnet, NFPA 72 calls for a visual inspection of spot-type smoke detectors every six months. It also calls for an annual test of the spot-type or duct detector that activates the smoke damper.
So the detector gets tested every year, even when the damper is only due every four years. It makes sense to line the two up. When the damper cycle comes due, schedule it with the annual fire alarm inspection. One visit can then confirm the whole chain: the detector senses smoke, the panel or relay sends the signal, the damper closes, and the position switch reports back. Record each part under the right standard.
What happens during a smoke damper test?
A periodic test proves the damper closes all the way and reports its position. A typical visit follows these steps:
- Find and reach each damper. Building code requires access openings and labels that identify the damper type.
- Do a visual check for rust, bent blades, debris, and broken linkages.
- Run the damper through a full cycle and confirm it closes completely from the open position, then reopens.
- Confirm all indicating devices work and report to the right place, such as the fire alarm panel or building automation system.
- Write down the damper location, date, inspector name, and any problems found, with space to note when and how each problem was fixed.
Dampers that cannot be reached for hands-on testing need remote test capability. A damper with remote inspection capability must clearly show when it is fully open and fully closed.
Signs your dampers need attention before the next test
Some problems show up between test cycles. Call a qualified pro if you notice any of these:
- A remodel or tenant finish added ductwork, ceiling grid, or cable trays near damper locations.
- Your records show no test within a year of installation, or more than four years since the last one.
- The fire alarm panel shows trouble or supervisory signals tied to damper position.
- Access panels are missing, painted shut, or blocked.
- No one on staff can produce a list of damper locations.
- A fire code official flagged opening protectives during an inspection.
In Denver office buildings that turn over tenants often, ceiling work is one of the most common ways dampers get blocked or disconnected.
Who is responsible for smoke damper testing?
The building owner is responsible. NEBB points out that the International Fire Code puts inspection, testing, and maintenance duties on the owner, and that records must be kept. A lease may pass the work to a property manager or tenant, but the fire code official will still look to the owner for proof.
Keep test records organized by damper location so you can produce them on request. If you already track sprinkler work, put damper and detector dates on the same calendar. Our NFPA 25 inspection guide for Colorado property owners covers the sprinkler side.
Why work with Pre Action Fire on the fire alarm side?
- Pre Action Fire, Inc. is a family-owned commercial fire protection company based at 2921 W 38th Ave in Denver.
- We have served businesses across the Denver metro area and the Front Range since 2009.
- All of our technicians are NICET certified.
- We are licensed with the Colorado State Fire Marshal and are an NFPA member.
- Our fire alarm work follows NFPA 72.
- Same-day service and 24/7 emergency fire protection are available.
Need your fire alarm and damper controls checked before your next inspection? Call Pre Action Fire at (303) 682-0113 or book an estimate at preactionfire.com.
Frequently Asked Questions
Does a new smoke damper need to be tested before the one-year test?
Yes. Once installation is done, an operational acceptance test confirms the damper works as intended and that its indicating devices report to the right place. The one-year periodic test comes after that.
Does the four-year schedule apply in every Front Range city?
Four years is the baseline in NFPA 105, which the International Fire Code references. Some local codes require more frequent testing, so check with the fire code official in your city.
Can smoke dampers be tested remotely?
Yes, if the damper has remote inspection capability that clearly shows full open and full closed positions. The International Building Code requires remote testing capability for dampers that cannot be reached for manual testing.
What records should a smoke damper test produce?
Each test record should list the damper location, test date, inspector name, and any problems found. It should also have space to note when and how each problem was corrected.
Recommended Reads
- Fire Pump Testing Requirements Under NFPA 25: A Guide for Denver-Area Facility Managers
- Fire Alarm Monitoring Requirements for Denver-Area Restaurants: What Owners Need to Know
- NFPA 25 Inspection Requirements Explained for Colorado Commercial Property Owners