Short answer: Build 3D printer enclosure panels from 1/4 in. clear acrylic for frames up to about 24 in. on a side, or 3/16 in. for small printers. Acrylic handles the 100 to 140 °F (40 to 60 °C) inside a typical enclosure, but keep it away from the hot end and heated bed, and add a vent with a filter if you print ABS or resin.

Why enclose a 3D printer?

Drafts and cool room air make ABS, ASA, nylon, and polycarbonate filaments warp and split between layers. An enclosure holds a steady warm pocket of air around the print. It also keeps dust off the bed, cuts noise, keeps curious hands and pets away from moving parts, and gives you somewhere to put a filter. Clear panels mean you can still watch the print without opening the door and losing the heat.

PLA usually prints fine without one, and too much heat can actually cause PLA to clog, so leave the door cracked or vent the box for PLA.

Can acrylic handle the heat?

Yes, with sensible spacing. The air inside an enclosed printer usually runs 100 to 140 °F (40 to 60 °C). Acrylic's maximum continuous service temperature is about 160 °F (71 °C) for extruded and 180 °F (82 °C) for cast, and it softens (Vicat) around 220 °F for extruded and 240 °F for cast. Keep panels at least 2 in. from the heated bed and well clear of the hot end, and never use acrylic as a heater shield or nozzle guard. If you plan an actively heated chamber above 150 °F (65 °C), use polycarbonate or metal panels instead. Acrylic heat resistance in detail.

Caution: acrylic is combustible. An enclosure can make a printer fire worse if one starts. Put a smoke detector above the printer, consider a thermal runaway check in your firmware, and don't leave long prints unattended in a closed room.

What size and thickness to choose

Measure your printer at its widest moving point (the bed at full travel, the spool holder, the cable chain) and add at least 2 in. on every side. Most enclosures for desktop printers end up 20 to 30 in. wide and deep.

  • 3/16 in. for small printers and panels up to about 18 in. on a side.
  • 1/4 in. for most enclosures. Stiff enough to stay flat in a frame and to hold a hinge.
  • 3/8 in. only for very large doors or freestanding panels without a frame.

Clear extruded sheet is a sensible lower-cost choice for flat framed panels. Choose clear cast if you're drilling lots of holes or want the best clarity. Gray or bronze tint hides a messy shelf and still lets you watch the print; tinted sheet runs 1/8 to 3/8 in.

Frames and hardware

Most people frame their enclosure with aluminum extrusion, wood, or a cabinet, then drop acrylic panels into slots or screw them on. A few details make it last:

  • Drill holes 1/16 in. oversize and keep them at least 1/2 in. from the edge. Acrylic expands with heat, about 0.00004 in. per inch per °F; see the thermal expansion calculator.
  • For extrusion slots, size panels about 1/32 in. short in each direction so they slide in without binding when warm.
  • A door can hang on small hinges with a magnetic catch. We can cut a finger notch or drill for a knob.
  • Cut pass-throughs for the filament path, power and USB cables, and a fan. Rounded corners on cutouts resist cracking.

Ventilation and fumes

ABS and ASA give off fumes and fine particles while printing, and resin printers smell strongly. An enclosure is the right place to capture them. Plan a round cutout for an exhaust fan with a carbon or HEPA filter, or a duct to outside. Common fan sizes are 80, 120, and 140 mm; add the screw holes to your drawing.

How we make it

Send panel sizes and hole positions as a sketch or DXF. We cut panels to size, drill holes, cut fan and cable openings, and can engrave a label or temperature scale on the door. Straight panels without cutouts go right through the instant quote; panels with cutouts are easiest through upload a drawing.

Questions

Do I need an enclosure for PLA?

Usually not. PLA prints well in open air, and a hot enclosure can cause heat creep and clogs. An enclosure with the door open or a vent running still helps with dust and noise.

Acrylic or polycarbonate for a printer enclosure?

Acrylic for passive enclosures; it's clearer, stiffer, and costs less. Polycarbonate if you'll heat the chamber above about 150 °F (65 °C), since it handles more heat before softening.

Does resin damage acrylic?

Uncured resin on its own is usually fine if wiped up, but the full-strength isopropyl alcohol used to clean prints can craze acrylic. Keep the wash station away from the panels and wipe acrylic with soapy water.