Bambu Lab H2 Series Diagonal 4-Inch Exhaust Duct Adapter (H2D / H2S / H2C)

Bambu Lab H2 Series Diagonal 4-Inch Exhaust Duct Adapter (4-Direction)

This is a diagonal exhaust adapter designed specifically for the Bambu Lab H2 series (H2D, H2S, and H2C). It allows you to connect the printer’s exhaust port directly to a standard 4-inch (~100 mm) ventilation duct, making it well suited for external venting, enclosure exhausts, or dedicated fume extraction setups.

The diagonal outlet geometry provides improved hose routing in tighter spaces and around obstacles. This model supports four different mounting directions, allowing the exhaust to be routed up, down, left, or right depending on your workspace layout.

Orientation Selection (Important)

This model is provided as two separate variants, each supporting two opposite diagonal orientations:

• H2DVentDiagonal-top-left-or-bottom-right

• H2DVentDiagonal-bottom-left-or-top-right

The orientation is fixed once printed, so you must select the correct variant before printing based on the direction you want the exhaust to point. Refer to the preview images to confirm which variant matches your desired installation.

Key Features

• Compatible with Bambu Lab H2D, H2S, and H2C

• Fits standard 4-inch (≈100 mm) ventilation ducts

• Diagonal outlet design for flexible hose routing

• Four-direction mounting support (separate models)

Hardware Requirements

The adapter is designed to be mounted using 20 mm self-tapping screws.

Recommended screw types:

• Bambu Lab BT3 Socket Head Cap Self-Tapping Screws (20 mm) https://ca.store.bambulab.com/products/bt3-socket-head-cap-self-tapping-screws-shcs-new?skr=yes&modelId=1401269

• Generic M3 self-tapping screws, 20 mm length https://www.amazon.com/Metric-Tapping-Stainless-Assortment-Drilling/dp/B0D1R21JRR?th=1

Installation Note – Do Not Skip the 4th Screw

This adapter uses four mounting screws.

⚠ Important:

The fourth screw is installed from inside the exhaust tube. Make sure to install it, as it is critical for proper clamping force, long-term stability, and vibration resistance.

Printing Notes

• Non-warping PETG is recommended for better heat resistance and durability.

• PLA may be acceptable depending on exhaust temperature and usage duration.

• Supports are required. Use organic supports for best results.

 TPU Gasket Variant

A second version of this model is provided for use with a TPU gasket.
This variant is slightly shorter to compensate for the thickness of the gasket, ensuring the same overall installed height and proper compression when mounted. Use this version if you plan to add a TPU gasket for improved sealing and vibration isolation.