Sunlu S2 Orginal Fan Circulation Mod

This modification allows you to use the original Sunlu S2 fan as a circulation fan, which significantly improves drying efficiency. The fan creates a vortex inside the filament dryer, mixing the air. In my setup, I replaced the fan at the bottom of the dryer with a different one that draws air from outside the dryer through a small 3 mm hole. This creates positive pressure inside the dryer, which in turn pushes some of the moist air out through the openings at the top.