cleanroom airflow studies
Airflow visualization (smoke studies) for cleanrooms and controlled environments, run by experienced study leads on our own protocol execution software. Core specialization in aseptic and sterile manufacturing.
the study you can actually stand behind
Airflow visualization, or the smoke study, demonstrates that air moves the way your design says it does, carrying particulate and contamination away from the point that matters under real operating conditions. It is expected across cleanrooms and controlled environments: at initial qualification, on a periodic cycle, and whenever the equipment, the room or the process has changed significantly since the last study. Whether the result answers to a regulator or only to your own engineering, it has to be evidence you can rely on.
Studies are not always executed to that standard. Some are filmed in a way that looks convincing but demonstrates little, delivered as unindexed video that is difficult to navigate, or documented in reports that assert compliance without showing it. This carries the most risk in aseptic and sterile production: a study that omits the interventions operators actually perform at the critical zone can pass while leaving the real risk untested. That gap typically surfaces only when someone asks to see an intervention that was never filmed.
We work across ISO-classified cleanrooms, RABS and isolators, biosafety cabinets and hoods. Our core specialization is aseptic and sterile filling, the most demanding application. Our study leads are former sterile operators and production managers who ran aseptic filling lines under GMP and supported them through regulatory inspections. That experience transfers directly to less demanding cleanroom environments.
Two things distinguish our studies: the experience of the people running them, and the speed of delivery. Our study leads know what a defensible study requires, we use a neutrally buoyant medium that follows the air rather than falling through it, and our software executes the protocol during filming. Because execution is live, you receive the report before we leave site, rather than four to six weeks later.
Book a study →- Study leads with operating experience. People who have performed these interventions in production and defended studies in audits, so the shots that matter are the ones that get captured.
- Neutrally buoyant medium. A fog that follows the air rather than sinking through it, so the footage shows real airflow instead of gravity.
- Multi-camera setups. Positioned to capture the critical zone and the intervention at the same time, rather than one at the expense of the other.
- Protocol authoring. Written for your environment, your interventions and your acceptance criteria.
- Live protocol execution. Our software runs the protocol as the study is shot, so the record assembles itself instead of being reconciled later.
- Report before we leave. The documentation is complete and issued on site, not weeks afterward.
The quality of a smoke study depends less on the camera than on the medium used and the experience of the people running it.
if your fog falls on its own, you did not study airflow
This is one of the most important details in airflow visualization, and one that clients are rarely told about.
Some providers generate the visible medium using WFI or gases that are heavier than the air around them. That medium descends whether or not any air is moving. With the HEPA units switched off entirely, it still falls to the floor, because it is denser than the surrounding air.
On camera this looks like textbook unidirectional flow: smooth, downward and sweeping away from the critical zone. The footage is persuasive, the study passes and the review meeting is satisfied, yet nothing about the airflow at your critical zone has actually been demonstrated.
This is misleading to you and to an inspector, and it carries real risk. A contamination control strategy built on such a study rests on evidence that was never evidence. Turbulence, dead zones and the recirculation behind an operator's forearm during an intervention all stay invisible until they surface as a media fill failure or a sterility investigation.
We use a neutrally buoyant medium. It follows the air, so turbulence at the critical zone is visible in the footage rather than hidden by a falling medium.
- A study can pass on a line that would actually fail in production
- Turbulence and dead zones stay invisible on camera
- Interventions appear protected when they are not
- Your contamination control strategy rests on unreliable evidence
- The problem surfaces later as a media fill failure or sterility investigation
- What medium was used, and was it neutrally buoyant? If no one at your site can answer this, that is worth resolving. Ask the provider directly, and request written confirmation.
- Was the medium ever demonstrated with the air handling off? It is a thirty-second test. A neutrally buoyant fog hangs and disperses. A heavy medium drops to the floor, and everything it appeared to prove is in question.
- Can you produce the footage on request? Not the report, but the video of a specific intervention, retrieved in minutes rather than hours. In a GMP audit an inspector will ask you to produce it, and a slow search through unindexed files reflects poorly on your document control.
If any of these gave you pause, it is worth a conversation before your next inspection rather than during it.
why our studies cost less and finish sooner
The value of a smoke study depends on two things: the experience of the people running it, and how the study record is handled once filming is complete. The table below compares the conventional approach with ours on both.
your study record, stored and accessible
When asked to produce the video evidence from a previous smoke study, many manufacturers struggle to locate it. The footage is often tens of gigabytes of unindexed clips on an external drive, with no straightforward way to identify which file shows a given intervention, and no one still on site who recorded it. In some cases the drive cannot be found at all.
This is an avoidable regulatory exposure. We store your footage and study record and provide access two ways.
Online, indexed and searchable. Locate any clip by protocol step, critical zone, intervention or acceptance criterion. When an inspector requests a specific intervention, your team can retrieve it during the inspection rather than following up afterward.
As a hard copy. You also receive the complete package on physical media for your records and archive, independent of our systems.
- Stored and retained. Footage and executed protocol held together as one record, not scattered across drives and inboxes.
- Remote access. Available to your team from anywhere, without shipping media around or hunting for the original laptop.
- Indexed and searchable. Find footage by protocol step, zone, intervention or criterion in seconds.
- Hard copy delivered. The full package on physical media for your archive and quality system.
- Audit-ready on demand. Pull the exact sequence an inspector asks for while they are still in front of you.
- No single point of failure. Your evidence does not depend on one hard drive that could be lost or damaged.
The following outlines how a study runs on site, from the initial call through to the report delivered before we leave.
from first call to final report
scope and review
We review the line, the room, the equipment, your contamination control strategy and the interventions your operators actually perform, including the ones that do not appear in the SOP but happen on every shift.
protocol authoring
A study protocol written for your installation, with defined critical zones, an intervention list and acceptance criteria, issued for your QA approval before we mobilize.
on-site execution
Our team runs the study with a neutrally buoyant medium and multi-camera coverage, executing the protocol live on our platform. Each sequence is shot, judged against its criteria by someone qualified to do so, and tied to its step before we move on.
report generated before we leave
Because the protocol is executed as we film, the documentation assembles itself as we go. You are not chasing a deliverable for six weeks after we have gone. The report is complete and issued before we leave your site.
video and online access
Indexed video and the executed protocol delivered alongside the report, both as a hard copy for your archive and online, where your team can search the footage by protocol step, zone or intervention.
findings and remediation
Where the study shows a problem, we can carry it forward into equipment modification, intervention redesign or procedure change, rather than handing you a report and leaving.
what clients ask before booking
When do we need a smoke study?
At initial qualification of a cleanroom or controlled environment, on a periodic requalification cycle (often every six to twelve months, depending on your risk assessment and framework), and after any significant change. Significant changes include equipment modification or replacement, room or airflow changes, new formats or container types, changes to interventions or operating practice, and relocation. Contamination events and unexplained environmental excursions are also common triggers. If you are unsure whether a change qualifies, that is a short conversation worth having before an inspector has it with you.
Which environments and frameworks do you cover?
Aseptic filling and sterile processing suites, ISO-classified cleanrooms, RABS and isolators, biosafety cabinets, and fume and flow hoods, across pharma, biotech, medical device, compounding and related regulated manufacturing. Studies are run to suit the framework that applies to you, including EU GMP Annex 1, FDA aseptic processing guidance, ISO 14644-3 airflow visualization and recovery tests, USP <797> and <800>, and NSF 49 for biosafety cabinets. Our core specialization is aseptic and sterile applications, the most demanding category, and the same methods apply to less demanding cleanroom environments.
What do you use to generate the visible medium?
A neutrally buoyant fog. This distinction is significant. Media heavier than air, including some WFI-based and gas methods, descend on their own even with the air handling switched off, producing convincing downward-flowing footage that shows gravity rather than airflow. A neutrally buoyant medium follows the air, so turbulence, dead zones and recirculation during interventions are visible.
Do you film interventions, or only steady-state airflow?
Both, and the interventions matter more. Steady-state airflow is the easy part of a study to pass; interventions are where studies fall short and where inspectors focus. We build the intervention list with your operators, so it includes the routine corrections people actually make on shift rather than only the ones written into the SOP.
How long does a study take?
Time on site depends on the line, the number of critical zones and the length of the intervention list. Because the protocol is executed live as we film, we are usually on site for less time than a conventional study of the same scope. There is also no waiting afterward: the report is generated before we leave your site rather than arriving weeks later.
Can you write the protocol, or do we supply it?
Either. We can author the protocol for your QA approval, or execute a protocol you already have. Most clients ask us to author it, because the intervention list is where studies most often fall short.
What do we receive at the end?
An audit-ready package: the executed protocol, the final report, and indexed video in which every sequence is traceable to the protocol step and acceptance criterion it demonstrates. You get it as a hard copy for your archive and as online access, where your team can search the footage by protocol step, critical zone or intervention instead of scrubbing through raw video files.
What if the study finds a problem?
Identifying a problem in the study means you have found it before a regulator does. We can then carry the finding into remediation, including equipment modification, intervention redesign, and procedure and training changes, using the same team.
tell us about the study.
Send us the line, the change that triggered it and your timeline. We will come back with a scope, a price and available dates.