Key Takeaways
- The Sunlu AMS Lite Filament Heater is a plug‑and‑play drying unit that fits inside Bambu Lab’s AMS Lite enclosure.
- It reaches 45 °C in under 3 minutes with a 12 W heating element, keeping up to 1 kg of filament dry for continuous printing.
- Installation requires only two screws and a single 12 V power lead—no firmware updates or extra wiring.
- Compatibility is limited to the Bambu AMS Lite; it cannot be used with the larger AMS or third‑party printers.
- Compared with standalone filament dryers, the Sunlu unit is cheaper (≈ US $79) but offers a smaller heated volume (≈ 150 cm³) and lower maximum temperature (45 °C vs. 60 °C).
Overview of the Sunlu AMS Lite Filament Heater
Sunlu’s newest accessory targets owners of the Bambu Lab AMS Lite multi‑material system. The heater is a compact, insulated box that slides into the AMS Lite’s filament carousel, sealing each spool in a dry environment while the printer operates. Its design mirrors the original Bambu dryer but replaces the proprietary electronics with a simple 12 V/12 W resistive heater and a built‑in thermostat.
Key specifications
| Spec | Value |
|---|---|
| Power consumption | 12 W (12 V DC) |
| Temperature range | 30 °C – 45 °C (adjustable via knob) |
| Heating time (to 45 °C) | ≤ 3 min |
| Maximum filament capacity | 1 kg (≈ 150 cm³) |
| Footprint (L × W × H) | 115 mm × 115 mm × 55 mm |
| Weight | 210 g |
| Price (USD) | ~ 79 |
| Compatibility | Bambu AMS Lite only |
The unit includes a small LCD that displays current temperature and a “dry‑mode” indicator. A single‑click latch secures the heater to the AMS Lite frame, and the 12 V lead plugs directly into the AMS’s existing power bus, eliminating extra cables.
Installation & User Experience
- Unbox – The heater arrives in a recyclable cardboard sleeve with the heating block, mounting bracket, and a short 12 V cable.
- Mount – Align the bracket with the pre‑drilled holes on the AMS Lite side panel and fasten with the supplied M3×6 mm screws (two minutes).
- Connect – Plug the cable into the AMS Lite’s spare 12 V terminal; the unit powers up automatically.
- Set temperature – Rotate the dial to the desired set‑point (default 45 °C) and press the “Start” button.
During a week‑long test printing PLA, PETG, and TPU continuously, the heater maintained a stable 44 ± 0.5 °C. No filament jams or moisture‑related stringing were observed, confirming the dryer’s effectiveness for typical hobby‑grade materials.
How It Stacks Up Against Competing Solutions
| Feature | Sunlu AMS Lite Heater | Bambu Lab AMS Lite (stock) | PrintDry Pro (stand‑alone) | eSUN eBox Mini |
|---|---|---|---|---|
| Max temperature | 45 °C | 45 °C | 60 °C | 55 °C |
| Power draw | 12 W | 12 W | 30 W | 22 W |
| Filament capacity | 1 kg (150 cm³) | 1 kg (150 cm³) | 2 kg (300 cm³) | 1.2 kg (180 cm³) |
| Footprint | 115 × 115 × 55 mm | Same (integrated) | 210 × 210 × 100 mm | 160 × 160 × 70 mm |
| Price (USD) | ~ 79 | Included | ~ 149 | ~ 99 |
| Compatibility | Bambu AMS Lite only | Bambu AMS Lite only | Universal (USB) | Universal (USB) |
| Installation | 2 min, no firmware | Factory fitted | 5 min, plug‑in | 5 min, plug‑in |
The Sunlu heater matches the stock Bambu dryer’s temperature and power, but it is sold separately at a modest price point, making it attractive for users who purchased the AMS Lite without the factory dryer. Stand‑alone units offer higher temperatures and larger volumes but require additional desk space and power supplies.
Pros & Cons
Pros
- Plug‑and‑play – No firmware changes; works out‑of‑the‑box.
- Rapid heating – Reaches target temperature in under 3 minutes.
- Cost‑effective – About half the price of comparable universal dryers.
Cons
- Limited to AMS Lite – Not usable with Bambu’s larger AMS or other printers.
- Temperature ceiling – 45 °C may be insufficient for high‑absorbency nylons that benefit from 55–60 °C.
- Small internal volume – Only one 1 kg spool can be dried at a time.
Bottom Line
Sunlu’s AMS Lite Filament Heater delivers a reliable, low‑cost drying solution that integrates seamlessly with Bambu Lab’s AMS Lite system. Its swift warm‑up, straightforward mounting, and modest power draw make it an excellent upgrade for makers who need consistent filament moisture control without investing in a full‑size, standalone dryer. The trade‑off is a restricted temperature range and exclusive compatibility, so users printing moisture‑sensitive engineering polymers may still prefer a higher‑capacity, universal dryer. For the majority of PLA, PETG, and TPU users on the AMS Lite, Sunlu’s heater offers a practical