Printing ABS without an enclosure is a gamble — the part warps, layers delaminate, and the styrene fumes fill the room. A proper enclosure solves all three problems: it traps heat for consistent layer adhesion, blocks drafts that cause warping, and contains fumes for extraction. The IKEA Lack table enclosure is the most popular DIY solution for good reason — it costs under $80 and takes an afternoon to build.
Why You Need an Enclosure
Three things happen when you print ABS, ASA, Nylon, or polycarbonate in open air:
Warping: The printed part cools unevenly. Top layers contract faster than bottom layers, pulling the corners off the bed. An enclosure keeps the entire part at a consistent 45-55°C during printing, minimizing differential contraction.
Layer delamination: ABS layers need to fuse while the previous layer is still warm. In a drafty room, each layer cools before the next one extrudes onto it. The bond is weak and the part splits along layer lines under load. An enclosure eliminates drafts and improves inter-layer adhesion significantly.
Fumes: ABS emits styrene gas during printing. Low concentrations are irritating. High concentrations are a health risk. A sealed enclosure with a filtration system captures these fumes before they enter your breathing space.
The IKEA Lack Enclosure: Parts and Cost
The standard build uses two or three IKEA Lack side tables (they’re hollow, lightweight, and exactly the right size to stack).
Materials list:
– 2x IKEA Lack tables ($15 each = $30)
– 3x acrylic or polycarbonate panels, 3mm thick, cut to fit the three open sides (~$25 at a hardware store)
– 1x sheet of 3mm plywood or MDF for the back panel ($8)
– 8x M3 bolts, washers, and nuts for mounting hinges and panels ($5)
– 1x 120mm PC case fan for exhaust ($8)
– 1x HEPA + activated carbon filter element ($10)
– Printed PLA/PETG brackets, hinges, and fan mount ($5 in filament)
– 1x adhesive foam weather stripping for door seal ($3)
– Optional: 1x PTC heater with thermostat for active chamber heating ($25)
– Optional: 1x smoke detector ($10)
Total: ~$75-110 depending on options.
Build Steps
1. Assemble the Lack Tables
Build both Lack tables according to IKEA instructions. Stack one on top of the other. The legs of the top table sit inside the top surface of the bottom table — this creates a cavity slightly wider than an Ender 3’s footprint.
Troubleshooting note: Lack tables have hollow honeycomb cardboard cores. If you drive a screw into a leg and feel no resistance, you hit a void. Move the screw 5mm and try again. For brackets that carry weight (like a filament spool holder on top), use T-nuts or toggle bolts that anchor against the inside surface.
2. Cut and Mount Panels
The three open sides get transparent panels. The back should be opaque (plywood or MDF is fine). Acrylic is cheaper but cracks if you drill too aggressively. Polycarbonate costs more but is practically unbreakable.
- Measure each opening (they should be roughly 440mm x 440mm but measure your actual build)
- Have the panels cut to size at the hardware store — straight cuts on acrylic at home are frustrating
- Mount panels with M3 bolts through pre-drilled holes in the Lack legs. Drill slowly through acrylic — high speed melts it
- Apply weather stripping along the door edges for a seal
3. Install Ventilation
The exhaust fan goes on the back panel, near the top. Heat rises, so pulling from the top removes the hottest (and most fume-laden) air.
- Cut a 120mm hole in the back panel with a hole saw or jigsaw
- Mount the fan blowing OUT (exhausting from the enclosure)
- Attach the filter element on the outside of the fan — activated carbon captures VOCs, HEPA captures particulates
- If venting outdoors is possible, skip the filter and run a 4-inch dryer duct from the fan to a window — this is far more effective
- Wire the fan to a 12V power supply. Run it continuously during ABS/ASA prints
4. Add Temperature Monitoring
A $5 digital thermometer/hygrometer placed inside the enclosure tells you the chamber temperature. For ABS, aim for 45-55°C. For ASA, 50-60°C. For Nylon, the hotter the better (70°C+ if your printer’s electronics can handle it — most stock control boards shouldn’t exceed 60°C ambient).
If chamber temperatures stay too low, add a PTC heater with a thermostat. A 100W PTC heater will bring a Lack enclosure to 50°C in about 15 minutes. Mount it away from the printer and never leave it unattended.
5. Electronics Relocation (Critical for High-Temp Printing)
Stepper motors and power supplies are rated for different temperatures. Most steppers are fine at 60°C. The power supply and control board are not — they rely on passive cooling that doesn’t work in a 60°C chamber.
Option A: Keep electronics inside. Limit chamber temp to 40-45°C and accept slightly higher warp risk with ABS. This is fine for PLA and PETG enclosures.
Option B: Relocate electronics outside. Extend the LCD ribbon cable, power supply wires, and control board to sit outside the enclosure. This lets you run the chamber at 60°C with no risk to electronics. Takes 2-3 hours but is the correct long-term solution for dedicated ABS/ASA printing.
Common Mistakes and How to Avoid Them
Mistake 1: Building a perfectly sealed enclosure with no ventilation
A sealed enclosure printing ABS reaches 70°C+ within an hour — high enough to soften PLA-printed printer parts (like the Ender 3’s extruder bracket) and cause heat creep in the hotend. The fix: Always have active ventilation. The exhaust fan creates negative pressure that contains fumes while preventing excessive heat buildup.
Mistake 2: Using thin acrylic that warps from chamber heat
2mm acrylic panels bow inward at 50°C. This breaks the door seal and creates drafts that defeat the purpose. The fix: Use 3mm minimum thickness, or switch to polycarbonate/glass. Glass is the best material — it doesn’t warp, scratch, or yellow — but it’s heavier and harder to cut.
Mistake 3: Placing the filament spool inside the enclosure during long ABS prints
ABS filament absorbs moisture from the warm, slightly humid air inside the enclosure. After 8+ hours, the filament pops and spits during extrusion, leaving surface defects. The fix: Mount the spool on top of the enclosure and feed filament through a PTFE tube and a small hole in the top panel.
Mistake 4: Forgetting the smoke detector
A thermal runaway event inside a sealed wooden enclosure is a fire risk. The fix: Mount a battery-operated smoke detector inside the enclosure. Check the battery monthly. If you print overnight, the smoke detector is non-negotiable.
Mistake 5: Using the enclosure for PLA without opening the doors
PLA needs cooling, not heating. Printing PLA inside a sealed enclosure causes heat creep — the filament softens in the heat break and jams. The fix: For PLA, open the front door or remove the top panel. Use the enclosure for ABS, ASA, Nylon, and PC only.
⚠️ Safety Notice: Enclosed 3D printing with high-temperature filaments involves fire risk from heated components and health risks from fume emissions. Always install a smoke detector inside the enclosure. Never leave an actively heated enclosure unattended for extended periods. Ensure your electrical wiring and PTC heater connections are properly rated and insulated. Follow 2026 fire safety codes applicable in your jurisdiction. ABS and ASA emit styrene gas — active carbon filtration or outdoor venting is strongly recommended. If you experience eye irritation, headaches, or respiratory discomfort, stop printing and improve ventilation.
Our ABS and ASA printing guide covers material-specific settings once your enclosure is built. For moisture-sensitive filaments, our filament dryer guide explains how to keep filament dry before and during printing.
For ABS and ASA filaments that print cleanly in a heated enclosure, uavmodel.com carries eSUN ABS+ and Polymaker ASA in 1kg spools with consistent 1.75mm diameter tolerance — less diameter variation means fewer extrusion issues at high chamber temperatures.