Improve thermal stability and eliminate heat creep with this purpose-built fan duct for the Creality K2 Plus.

This design channels airflow directly through the heatsink fins, instead of allowing it to dissipate around the hotend—resulting in significantly more efficient cooling where it matters most.

⚙️ Engineering Focus

Directed airflow path optimized for maximum fin penetration

Improved thermal gradient between heat break and heatsink

Designed to maintain consistent cold-zone temperatures

🚀 Performance Benefits

❄️ Enhanced heatsink cooling efficiency

🔥 Reduced heat creep under sustained high-temp printing

🧵 Lower risk of clogs and filament softening above the melt zone

⚙️ More stable extrusion over long print durations

📈 Improved reliability with long prints with demanding materials (e.g. PETG, ABS, CF blends)

🧵 Print Recommendations

Material: PETG-CF (recommended) for thermal resistance and rigidity

Nozzle:

0.4 mm (standard, balanced strength/detail)

0.2 mm (recommended for non-CF materials for tighter tolerances and cleaner geometry)

🔧 Installation

Required hardware:

2× M2 threaded inserts (heat-set)

2× M2 screws

Install by heat-setting the inserts and mounting the duct using the two unused fan mounting holes.

A simple but highly effective upgrade that improves hotend cooling dynamics, minimizes failure modes like heat creep, and increases overall print consistency—especially during long or high-temperature jobs.

Hotend Fan Duct for Creality K2 Plus