PETG Filament Temperature Guide 2026: Nozzle, Bed & Speed by Hotend Type
TL;DR
PETG filament temperature typically lands at 230–250°C nozzle and 70–85°C bed, but the right number depends on your hotend, enclosure, and print speed. All-metal hotends run hot and fast (240–260°C). PTFE-lined budget hotends cap around 240°C reliably. Satin PEI beds like a hotter surface than most. The PETG we stock has a tested sweet spot of 235–245°C nozzle, 75–80°C bed, 30–60 mm/s for outer walls.
This guide gives you per-hotend starting values, then a three-step tuning loop to lock in your specific setup. If you're coming from PLA, see also our PETG vs PLA head-to-head.
Why PETG Temperature Matters More Than PLA
PLA is forgiving. You can run it 200–220°C across almost any hotend and get usable parts. PETG has a wider workable range on paper (roughly 220–260°C), but a much narrower clean-print range for any given printer and profile.
Too hot and PETG turns into a stringing, oozing, blob-covered mess. Bridges sag. Outer walls pick up zits from every travel move. Fresh spools that print clean at 240°C will thread strings at 250°C.
Too cold and layer adhesion collapses. Parts look fine but snap along layer lines under light load. Top layers show gaps because the melt can't keep up with your flow rate.
PETG's glass transition sits around 80°C, which is why bed temps live in the 70–85°C range — hot enough to grip during the print, cool enough to release when done. Push the bed higher and you fight warping on tall parts; go lower and the first layer pops.
For a broader view across materials, see our nozzle temperature guide by material.
PETG Temperature Quick-Reference Table (By Hotend & Architecture)
Values below are starting points. Always run a temp tower before committing to a profile. Bed temperatures assume the first layer is +5°C hotter than the rest.
| Hotend / Architecture | Nozzle (°C) | Bed (°C) | Print Speed | Part-Cooling Fan | Build Surface Notes |
|---|---|---|---|---|---|
| Open-frame bedslinger, PTFE-lined hotend | 230–240 | 75–85 | 40–60 mm/s | 30–50% | PEI or glass + glue stick |
| Open-frame bedslinger, all-metal direct drive | 240–250 | 70–80 | 150–200 mm/s | 30–50% | Textured PEI — clean with IPA |
| Enclosed CoreXY, direct drive, all-metal | 240–260 | 70–80 | 180–250 mm/s | 30–40% | Textured PEI or engineering plate |
| Bowden setup with all-metal upgrade | 235–250 | 75–85 | 40–80 mm/s | 30–50% | Glass + glue stick |
| Prusa MK4 / MK4S / Mini+ (satin PEI) | 230–250 | 80–90 | 50–150 mm/s | 30–50% | Satin/textured PEI |
Match your printer to the closest row, then use the three-step loop below to refine.
Open-Frame Bedslinger with PTFE-Lined Hotend
Budget bedslingers with PTFE throat liners cap out reliably at 240°C. You can push to 245°C for short prints, but the PTFE will off-gas and the fumes will drift under-extrusion errors within a few weeks. For long-term PETG use, swap in an all-metal hotend and you can safely run up to 260°C.
Bowden setups (long PTFE tube from extruder to hotend) need longer retraction than direct-drive builds — 4–5 mm at 40 mm/s is a solid start. Nozzle temp doesn't change between bowden and direct; only retraction distance does. Direct-drive conversions run 1–2 mm retraction at the same nozzle temp.
Open-Frame Bedslinger with All-Metal Direct Drive
Open frame means no enclosure, so ambient stays cool and layer adhesion holds up even with the fan running 40–50%. Start at 245°C nozzle, 75°C bed. If your first layer curls at the corners, bump bed to 80°C and slow the first layer to 20 mm/s.
Generic PETG slicer profiles are a fine baseline. Modern all-metal direct-drive machines will happily push PETG at 150–200 mm/s once dialed in.
Enclosed CoreXY with Heated Chamber
Enclosed CoreXY machines trap heat. Chamber temperature climbs 10–15°C above ambient during long prints, which is great for PETG's layer bonding but rough on cooling-sensitive overhangs. Drop the fan to 30% for walls and 0% for the first two layers. If you see brittle parts, the fan is almost always the culprit — not the nozzle.
Once the chamber warms past 40°C, usually within 15 minutes, drop the bed setpoint by 5°C to avoid warping on tall parts. The heated ambient does most of the adhesion work.
These machines push PETG hard. 250°C at 200 mm/s is realistic if your slicer profile respects the volumetric flow ceiling (usually around 24 mm³/s for a 0.4 mm hotend).
One caveat for multi-material feeders: most enclosed feeders are not sealed against humidity. PETG picks up moisture in under 48 hours in humid climates. If a spool that printed clean last week is stringing today, dry it at 65°C for 6–8 hours before you touch any settings. Forgely's proprietary injection-molded empty spools are Bambu AMS compatible if you're respooling dried filament.
Prusa MK4 / MK4S / Mini+
Prusa's stock PETG profile in PrusaSlicer is one of the strongest baselines you'll find anywhere. Their engineers spent real time tuning it for their satin sheet and hotend geometry, and the official Prusa Knowledge Base numbers hold up.
Bed temps run higher on Prusa — 85–90°C is normal. The satin sheet grips PETG hard when hot, then releases cleanly when it cools past 50°C.
Warning worth repeating: PETG bonds too aggressively to smooth PEI. If you print PETG hot on a smooth sheet with no release agent, you can rip the PEI coating off the spring steel. Use the satin or textured sheet, or lay down a thin glue stick barrier every time. This has ruined more sheets than every other PETG mistake combined.
If you need spare nozzles, Prusa V6 0.4 nozzle 2-pack fits MK4/MK4S/Mini+.
The 3-Step Temperature Tuning Loop
Step 1: Run a Temperature Tower (230–260°C in 5°C steps)
Slice a standard temp tower model with your target PETG at 30–60 mm/s. Change nozzle temp every 5°C from 230°C up to 260°C. Print. Inspect.
Pick the band with the cleanest overhangs AND no stringing. If two bands look equally good, choose the higher one — layer adhesion improves with temperature.
Step 2: Dial Retraction After Nozzle Temp Is Locked
Only tune retraction after you fix the nozzle temp. Trying to solve over-temperature stringing with more retraction is a losing fight — the melt oozes faster than the extruder can pull it back. Fix the temperature first.
Standard PETG retraction starting points: - Direct drive: 0.8–2 mm at 40 mm/s - Bowden: 4–5 mm at 40 mm/s
Step 3: Validate Layer Adhesion With a Bend Test
Print a 20 mm hollow cube with 3 perimeters and no top layers. Snap it along the Z axis with pliers.
A clean fracture along a single layer line means the nozzle is too cold. Bump 5°C. A jagged, splintered break across multiple layers means the layer bond is stronger than the layer itself. You're dialed in.
PETG Troubleshooting by Symptom
| Symptom | Likely Cause | Fix |
|---|---|---|
| Stringing between parts | Nozzle too hot OR wet filament | Drop nozzle 5°C. Dry spool at 65°C for 6h. Set retraction to 1–2 mm (direct) or 4–5 mm (bowden). |
| Blobs / zits on outer walls | Pressure advance not tuned; nozzle too hot | Run pressure advance calibration. Drop nozzle 5°C. Enable coasting or wipe. |
| Weak layer adhesion / parts snap easily | Nozzle too cold; fan too high | Raise nozzle 5–10°C. Cap fan at 30–40%. |
| Print won't stick to bed | Bed too cold or surface contaminated | Raise bed 5°C. Clean with IPA. First layer +5°C nozzle. Add a glue stick barrier. |
| Print sticks TOO well (chips PEI) | Smooth PEI + PETG = fused | Switch to textured PEI, or apply glue stick as release. Never print PETG directly on bare smooth PEI hot. |
| Under-extrusion / gaps in top layers | Nozzle too cold for print speed | Raise nozzle 5°C per +20 mm/s speed increase, or slow down. |
| Bubbly / popping sounds while printing | Moisture in filament | Dry the spool. Store with desiccant. PETG absorbs water in under 48h in humid climates. |
Speed vs Temperature — The Relationship People Miss
Melt flow scales with time-in-hotend. Run the filament through faster and you need more heat to keep the melt rate steady.
Rule of thumb: every +20 mm/s of print speed, add +5°C to the nozzle.
| Speed | Nozzle Temp |
|---|---|
| 40 mm/s | 235°C |
| 100 mm/s | 245°C |
| 200 mm/s | 250°C |
| 300 mm/s (high-flow PETG only) | 255–260°C |
The ceiling isn't raw speed — it's volumetric flow. A stock 0.4 mm hotend tops out around 20–24 mm³/s regardless of temperature. Push past that and you get under-extrusion no matter how hot you run. High-flow PETG grades are formulated specifically to shift that ceiling higher.
Bed Adhesion & Build Surface Choices for PETG
Textured PEI — best all-round for PETG. Grips when hot, releases when cool, forgives fingerprints. Textured 256×256 mm plate fits most 256 mm bedslingers.
Smooth PEI — dangerous with PETG. Bonds so hard it can rip the coating off. Only use with a glue-stick release layer, and never at bed temps above 75°C.
Glass + glue stick — cheap, reliable, forgiving. The classic budget bedslinger combo still works.
Garolite / G10 — pro-tier for warp-prone parts and large flat prints. Nylon printers love it too.
For a modern grip-then-release surface, BIQU Cryogrip Pro Glacier is worth the swap.
Storage & Drying — The Hidden Temperature Variable
PETG is hygroscopic. In humid climates, an open spool absorbs enough water in a weekend to noticeably degrade prints — stringing, popping, dull surface finish. None of your temperature tuning matters if the filament is wet.
Dry PETG at 65°C for 6–8 hours before critical prints. Store in a sealed container with fresh silica beads between uses. A dedicated filament dryer pays for itself in reduced reprint waste within a month if you print PETG regularly.
Our Recommended PETG Starting Profile
Here's what we run internally on the Eryone PETG we stock:
- Nozzle: 240°C (first layer 245°C)
- Bed: 75°C (first layer 80°C)
- Speed: 150 mm/s outer walls, 200 mm/s infill
- Fan: 40% after layer 3, 0% for the first two layers
- Retraction: 0.8 mm at 40 mm/s (direct drive) / 4 mm at 40 mm/s (bowden)
If you want a spool tuned to these numbers out of the box, that's the spool we reach for. If you're printing another brand, the three-step tuning loop above works the same. The goal here is a printer that prints reliably — whichever filament sits on top of it.
Forgely Performance PLA is made in the USA at our Ogden, Utah facility. The PETG we sell is a third-party line we stock rather than extrude. Our empty spools are proprietary injection-molded and Bambu AMS compatible.