Printing ASA or ABS in an enclosure releases styrene and other VOCs along with ultrafine particles — into whatever room the printer is sitting in. Cracking a window moves almost none of it. The QBL S4 Fume Extraction Kit is the plug-and-play fix: a 100 mm CLOUDLINE PRO S4 inline fan, a 10-speed controller, 2.4 m of four-layer flexible ducting and four stainless clamps, ready to vent your enclosure out a window or wall port. At 26 dBA it is quiet enough to sit beside you through a 48-hour print. We put this kit together because we run the same setup on our own printers for ASA and ABS.
What is in the kit
| Item | Why it is in there |
|---|---|
| CLOUDLINE PRO S4 inline fan, 100 mm | Mixed-flow impeller and PWM-controlled EC motor — quiet at low speed, and able to hold airflow through duct rather than collapsing the moment you attach any |
| 10-speed corded controller | Match extraction to the material — low for a long PLA print, high for ASA and ABS. Backup memory returns to your setting after a power cut |
| 2.4 m four-layer flexible ducting | Aluminium and thermoplastic, flame-retardant, enough reach to get from a bench printer to a window or wall port |
| 4 × stainless steel duct clamps | Airtight seal at every joint — a leaking connection dumps the fumes back into the room you are extracting from |
Quiet enough to leave running
An extraction system only helps if it is switched on, and the reason most get switched off is noise. A hardware-store duct fan runs an AC motor at one speed and one volume, and nobody wants that beside a desk for two days.
The S4 uses a PWM-controlled EC motor rated at 26 dBA, the quietest in the CLOUDLINE range, and it draws 21 W average against a 28 W maximum. Power falls away steeply as you dial the speed back, because fan power scales with roughly the cube of speed — an AC fan pulls near its full rating whatever speed you set. In practice that means you can leave it running for the whole print rather than deciding each time whether it is worth the noise.
Static pressure is what actually gets fumes out of the room
Fan airflow ratings are measured with nothing attached. Add 2.4 m of flexible duct, a bend to reach the window and an enclosure port narrower than the duct, and a fan chosen on its flow number alone will barely move air. The S4 is a mixed-flow design rated at 223 Pa, and that figure is what decides how much of the 384 m³/h survives the run.
Be realistic with it: 223 Pa is the lowest in the CLOUDLINE range, and it is sized for a desktop printer enclosure, not a workshop. Keep the duct as short and straight as the bench allows and it will do the job comfortably.
Ten speeds, matched to what you are running
Levels 1–3
- Long PLA and PETG prints
- Background air exchange overnight
- Keeping an enclosure from heat-soaking
Levels 7–10
- ASA and ABS, where emissions are highest
- Purging the enclosure before you open the door
- Clearing the chamber after a print finishes
Full specifications
| Fan | AC Infinity CLOUDLINE PRO S4 / AI-CLS4 |
| Duct diameter | 100 mm (4″) |
| Maximum airflow | 384 m³/h (226 CFM) |
| Maximum noise | 26 dBA |
| Static pressure | 223 Pa |
| Maximum / average power | 28 W / 21 W |
| Voltage / frequency | 100–240 V AC / 50–60 Hz |
| Power connection | Australian three-pin plug |
| Fan dimensions | 188 × 303 × 176 mm |
| Ducting supplied | 2.4 m four-layer flexible, aluminium and thermoplastic, flame-retardant |
| Clamps supplied | 4 × stainless steel |
| Controller | Corded 10-speed dial with backup memory, 3.05 m lead |
| Mounting | Horizontal or vertical |
| Ingress protection | IP44 |
| Bearings | Dual ball, rated 67,000 hours (manufacturer rating) |
| Certifications | SAA · CE · ETL · RoHS |
| Fan manual | Download PDF |
FAQ
Do I need this if I only print PLA?
It is far less critical. PLA is the lowest-emitting common filament and most people run it in a normally ventilated room without a dedicated extraction setup — though it still emits ultrafine particles, so a room with some air exchange is sensible rather than a sealed study. This kit becomes important the moment you print ASA or ABS, where both particle and VOC output are substantially higher.
Should I wait before opening the enclosure?
Yes. An enclosure holds the emissions in while it prints, so opening the door immediately releases the lot into your face and the room. Run the fan for several minutes after the print finishes to purge the chamber first — that habit matters as much as the hardware, and it costs nothing.
Will it fit my printer enclosure?
It terminates in standard 100 mm (4″) duct. Most enclosures — including the common Bambu Lab and Prusa setups — either have a 100 mm exhaust port or take a printed adapter to one, which is exactly the kind of part worth making in PETG-HF or ASA. Measure your port before ordering; if it is an odd size, ask and we will tell you what reduces to it.
My printer has no enclosure — is this still worth it?
Less so. Extraction works by pulling from a contained volume; an open printer lets emissions into the room before the fan ever sees them. You would get some benefit ducting from a hood directly above the machine, but the bigger win is enclosing the printer first, then extracting from it. If you print ASA or ABS on an open machine, that is the thing to fix first.
Can I use it on a laser cutter or engraver?
People do, and the fan is well suited to ducted extraction generally — but we should be straight with you: our own testing has been on 3D printer enclosures, not on lasers. We cannot tell you from experience how it performs on a particular machine. Laser smoke volume varies enormously between a small diode engraver and a CO₂ cutter, and machine makers usually publish a required extraction rate. Check that figure against the 384 m³/h (226 CFM) and 223 Pa here before you rely on it, and if it falls short, size up to a 150 mm fan and duct rather than making this one work. Talk to us with the machine details and we will help you compare — including telling you when this kit is not the right answer.
Is 2.4 m of ducting enough to reach my window?
For a bench beside or near a window, yes. If the machine sits further away, add a length of flexible ducting — but keep it as short and straight as you can, because every extra metre and every bend costs airflow.
How noisy is it really during a long print?
26 dBA is the rated figure and that is at the fan's rated speed, not level 10. On the low settings you would use for an overnight print it disappears into room noise. Wound up it is audible, as any fan is at full tilt. If the machine lives in a bedroom or office, a duct silencer takes the edge off the remaining airflow noise.
Can I make it turn on by itself?
Yes, later, without replacing anything. The fan is UIS compatible, so swapping the 10-speed dial for a Controller 69 Pro or Controller AI+ adds temperature triggers, schedules and app control — useful if you want extraction running whenever the enclosure warms up rather than whenever you remember.
Is this genuine AC Infinity with Australian warranty?
Yes. The fan and controller are genuine AC Infinity and Quick Bloom Lights is the official Australian importer and distributor. The kit ships with an Australian three-pin plug and a two-year warranty handled here in Sydney. We put the kit together because we run this exact setup on our own printers for ASA and ABS.
General guidance only. This kit is ventilation equipment, not a certified fume-control or air-purification system, and it does not remove the need to follow your printer or machine manufacturer's safety instructions. If you have a specific health concern, or are printing in a workplace covered by occupational health and safety obligations, seek advice appropriate to your situation.