H2D / H2S / H2C Diagonal 4-Inch Exhaust Vent

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, for different exhaust directions.
The orientation is fixed once printed, so make sure to select and print the correct version for your desired exhaust direction before 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)
• Generic M3 self-tapping screws, 20 mm length

https://ca.store.bambulab.com/products/bt3-socket-head-cap-self-tapping-screws-shcs-new?skr=yes&modelId=1401269

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. A long screwdriver or bit extension is recommended.

Printing Notes

• Non-warping PETG is recommended for better heat resistance and durability.
• PLA may be acceptable depending on exhaust temperature and usage duration.
• Use sufficient wall thickness and infill to maintain rigidity.
• Supports are required. Use organic supports for best results.