Bambu Lab H2S: The Single-Nozzle Heated-Chamber Option
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The H2S is the H2D with one nozzle instead of two: 340 × 320 × 340 mm, 350 °C hotend, 120 °C bed, 65 °C actively heated chamber, up to 1000 mm/s toolhead speed. It is the Bambu machine for engineering filaments and large parts when you do not need purge-free dual material. Buy the H2D for two nozzles; buy the P2S if a passive enclosure is enough.
Where to buy
Specifications
| Item | Value | Note |
|---|---|---|
| Build volume | 340 × 320 × 340 mm | Largest single-nozzle volume in the Bambu range |
| Nozzles | 1 | Same hotend family as H2D, X2D, P2S |
| Max nozzle temperature | 350 °C | Hardened steel gear and nozzle |
| Max bed temperature | 120 °C | |
| Chamber | 65 °C, actively heated | Flap-switched airflow for PLA with door closed |
| Toolhead speed / acceleration | Up to 1000 mm/s / 20000 mm/s² | Sustained speed set by hotend flow |
| Sensors | Nozzle pressure (eddy current), 5 NTC temperature sensors, 5 flame sensors | Servo extruder |
| Multi-material | AMS 2 Pro, AMS HT | |
| Laser | Optional 10 W 455 nm module | Emergency stop and safety window included |
H2S or H2D
Identical chamber, hotend and electronics. The H2D adds a second nozzle, a slightly smaller shared dual-nozzle volume and laser editions; the H2S has a larger single-nozzle volume and costs less. If your reason for buying is nylon, PC, PPA or fibre blends, the H2S delivers the same material capability. If your reason is soluble supports without purge, or two nozzle sizes in one print, that is the H2D. See the H2D page.
H2S or P2S
The P2S is a 256 mm passive enclosure at 300 °C. It prints ABS and ASA well and PC and nylon adequately with dried filament and care. The H2S adds 84 mm of X, 50 °C of chamber temperature and 50 °C of hotend. If nylon or PC is a weekly material, the H2S is the correct step; if it is a once-a-year experiment, it is not.
Traps
- Plates are not 256 mm; existing Bambu plates do not carry over.
- Heated chambers dry the air; PLA overhangs need the airflow flap in low-temperature mode.
- Hardened nozzle does not mean any filament: 350 °C is still below PEEK and PEKK territory.
The units in the box
The H2S is not sold on Amazon US; it is bought directly from Bambu Lab. The listings below are the closest Bambu machines that are on Amazon, shown so you can compare the alternative rather than as a substitute for the H2S itself.
FAQ
Is the H2S faster than the H2D? Same motion system; the lighter single toolhead can hold higher speeds on some paths, but flow is the real limit.
Can I add a second nozzle later? No.
Does the AMS 2 Pro need to sit inside the chamber? No; it sits on top, connected by tube.
LayerWalker
Print defect diagnosis, calibration procedures and parts that actually fit. Corrections welcome through the contact page.
