Printer Filament Guide

Best Filament for the Prusa CORE One

Prusa's first fully-enclosed CoreXY with active chamber heat: the engineering-material machine.

Last updated: June 2026

The CORE One is Prusa's enclosed CoreXY flagship, announced at Formnext in November 2024 and shipping from early 2025 (the current revision is sold as CORE One+). It moves a light toolhead instead of slinging the bed, fits a 250 × 220 × 270 mm build volume into a smaller footprint than the MK4S, and adds the thing that matters most here: a fully enclosed chamber with active temperature control up to about 55 C. It keeps the load-cell Nextruder direct drive and the high-flow brass CHT nozzle.

What the Prusa CORE One prints well

Recommended materials for this printer:

PLA PLA+ PETG TPU ABS ASA PC Nylon

Fit a hardened nozzle before any carbon- or glass-fibre filament, since the stock nozzle isn't abrasive-rated. Everything non-abrasive prints out of the box.

Cheapest filament for the Prusa CORE One right now
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The active chamber is the whole reason to pick this for tougher filament. ASA, ABS and ASA/ABS-CF print cleanly without warping or layer splitting, which the open MK-series machines struggle with on larger parts. PC blends and high-temp engineering materials become realistic, especially with the optional HT hotend that raises the ceiling toward 400 C. PLA still prints great, just watch chamber heat soak on long PLA jobs. The stock nozzle is brass, so abrasives still need a hardened swap.

Prusa CORE One specs that affect filament

Build volume
250 × 220 × 270 mm
Enclosure
Enclosed
Heated chamber
Yes
Extruder
Nextruder (direct drive)
Max hotend temp
290°C
Stock nozzle
High-flow Prusa brass CHT nozzle, 0.4 mm (swappable; optional HT hotend to ~400 C)
Abrasive-ready (CF/GF)
Needs hardened nozzle
Multi-material
MMU3 (up to 5 materials); INDX toolchanger (up to 8) announced as coming

This is the printer for someone who actually prints engineering materials: functional ABS/ASA/PC parts, enclosures, automotive bits, and who wants Prusa's profiles plus an active chamber without a CoreXY tuning project. Add the MMU3 for multi-material, with the INDX toolchanger announced for the future.

Filament notes for the Prusa CORE One

  • Active heated chamber (~55 C) makes ASA, ABS and ASA/ABS-CF reliable on large parts, the big advantage over the MK4S.
  • PC and PC blends are realistic here, especially with the optional HT hotend pushing the ceiling toward ~400 C.
  • Stock 290 C high-flow brass CHT nozzle covers PLA, PETG, ASA, ABS and PA-CF; brass still wears on abrasives.
  • Swap to a hardened steel nozzle before running carbon- or glass-filled filament; the chamber doesn't change nozzle wear.
  • PLA prints fine but watch chamber heat soak on long jobs: crack the door or skip active chamber heat for big PLA prints.
  • Nextruder direct drive handles TPU well inside the enclosed, draft-free chamber.
  • MMU3 adds up to five materials; an INDX toolchanger for up to eight has been announced as coming.
How SpoolHound tracks prices

The deals above are filtered to the materials the Prusa CORE One handles, aggregated from multiple retailers daily and normalised to cost per kg, so the cheapest in-stock option is always on top. Prices refresh every 24 hours and are region-aware, so switch your region in the nav. Click through to the retailer to confirm the live checkout price.

Frequently Asked Questions

Does the Prusa CORE One have a heated chamber?
Yes. It's fully enclosed with active chamber temperature control up to roughly 55 C, which is what makes ASA, ABS and PC blends print reliably without warping. That's a clear step up from the open-frame MK series.
How is the CORE One different from the MK4S?
The CORE One is an enclosed CoreXY machine with an actively heated chamber, while the MK4S is an open-frame bed-slinger. Both share the Nextruder direct drive and 290 C high-flow nozzle, but the CORE One is built for engineering materials and the MK4S for everyday PLA/PETG.
Can the CORE One print high-temp materials like PC?
Yes. The heated chamber plus the stock 290 C hotend handles PC blends, and the optional HT hotend raises the nozzle ceiling toward 400 C for more demanding engineering filaments. Carbon/glass-filled versions still need a hardened nozzle.
Does the CORE One support multi-material printing?
Yes, it works with the MMU3 for up to five materials, and Prusa has announced an INDX toolchanger supporting up to eight materials as a future option.

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