The Flue Chute

The Flue Chute: 100mm Chimney Vent Adapter

The Flue Chute is a functional design created to repurpose an old, out-of-service chimney clean-out door into a dedicated exhaust port for 3D printer fumes. Perfect for makers who have their setup in a basement or workshop with existing masonry, this adapter allows you to vent VOCs and heat directly into a decommissioned flue using standard 100mm (4-inch) flexible tubing.

Designed in Fusion 360 with precision tolerances, the model features a tiered aesthetic that provides structural rigidity while maintaining a clean, modern look against rough masonry.

SAFETY WARNING

This model is strictly for use with chimneys that are PERMANENTLY OUT OF SERVICE.

• NEVER install this in a chimney that is currently connected to a functional fireplace, wood stove, or furnace.
• FIRE HAZARD: Plastic components (PLA, PETG, ABS) will melt or ignite if exposed to the heat of a live chimney.
• Ensure your flue is clear of obstructions and no longer in use before installation.

Features

• Direct Fit: Replaces standard metal clean-out/soot doors.
• 100mm Compatible: Designed specifically for 100mm (4") ducting common in 3D printer enclosure kits.
• Easy Install: Uses the existing frame of your clean-out door for a secure fit.

Printing Recommendations

• Material: PETG or ASA is recommended for better durability and slight heat resistance from printer exhaust, though PLA works for basic venting.
• Walls: 3–4 wall loops for a sturdy airtight seal.

• Supports: No supports required if printed face-down.

   

Print Option 1: Support-Free Profile (Recommended)

Here is a concise wrap-up of the two printing paths you can include in your MakerWorld listing for The Flue Chute. This explains the technical logic behind the modifications we made to your Fireplace_plate.3mf file.

Print Option 1: Optimized & Support-Free (Recommended)

This is the default configuration for the provided print profile. It is tuned to utilize the bridging capabilities of your printer to save time and material.

Orientation: Printed Face-Down (decorative "bumps" against the build plate).

Support Setting: Disabled. The internal angles and 100mm flange ceiling are handled via bridging.

Wall Loops: Increased to 4 to provide extra structural "meat" for the steep overhangs to grip.

Print Option 2: Supported (Manual Selection)

If you prefer the peace of mind of a physical structure under every overhang, you can enable supports, but be aware of the following:

Cleanup Difficulty: Standard tree or grid supports will be extremely difficult to remove from the tight tolerances of the decorative plate grooves.

Requirement: If you choose this path, it is highly recommended to use a Support Interface material (like PETG for a PLA print, or specialized Support-W).

Consequence: Without a dedicated interface material, the supports will be hard to remove I was able to easilly peal off the suppor with a metal drywall knife