How to Make Your 3D Printing Space Safer

Review the room, the printing process and the people nearby.

The essentials

FDM printers emit ultrafine particles and volatile organic compounds during every print. PLA — often considered safe — emits up to 65,000 particles/cm³. ABS and Nylon push significantly higher. These particles are sub-100 nm: small enough to bypass the respiratory system's natural filters and reach deep lung tissue. Running printers in an unventilated, occupied room is the most common exposure scenario in small operations.

PLA emits up to 65,000 ultrafine particles/cm³ during printing — particles small enough to bypass the respiratory system and reach deep lung tissue
— Journal of Toxicology and Environmental Health, Part A, 2019

ABS emits nearly 5x more particles than PLA, pushing above 300,000 particles/cm³
— Atmospheric Environment, Vol. 79, 2013

Who it is for

Makers, designers, or small teams running open-frame printers in a studio, workshop, or home office. Anyone who hasn't yet put any structure around where printers live or how emissions are managed.

What this procedure resolves

You're printing. Parts are coming out. Nothing feels wrong — which is part of the problem. Ultrafine particles are invisible and odourless at low concentrations. ABS and Nylon have a detectable smell; PLA generally doesn't. Neither smell nor the absence of it tells you what's in the air.

At Level 1, printers typically run on a desk, in a shared room, with no enclosure and no extraction. The emissions disperse into the occupied space. If you're in that room for multi-hour prints, you're breathing the output. Over weeks and months, that adds up.

Follow the procedure

1.
Move printers to a dedicated space, or at minimum a defined zone
A corner, a shelf unit, a spare room — anywhere you can separate the print environment from the occupied work area. This reduces passive exposure during long prints.
2.
Open a window or add basic mechanical ventilation during active prints
Air movement doesn't eliminate particles, but it reduces concentration. Position any ventilation so air moves away from breathing zones, not across them.
3.
Install a consumer-grade air quality monitor near the printers
Devices like the Airthings View Plus or Temtop M2000 measure PM2.5 and TVOCs in real time. You need a baseline before you can improve. Run it for a week of normal printing and note peak readings.
4.
Stop printing ABS or Nylon in unenclosed, unventilated spaces
PLA is the lower-risk option for open environments. If ABS or Nylon is required, delay those prints until ventilation is in place. This is the single highest-impact immediate change.
5.
Identify which printers in your setup are open-frame
Open-frame printers — any machine without a sealed enclosure — are the primary emission source. Knowing exactly which units are unenclosed tells you where to focus next.