BIQU H2 5015 Cooling Duct

Part cooling duct for BIQU H2 using 5015 fan. Orient the duct for printing upright as it will be used. Print using supports under the full base I painted support requirements on the full base using PrusaSlicer. Supports are not required for the vertical screw mount plates.

I used PLA3D850 filament since it has a higher heat resistance than regular PLA and is stiffer than PETG. Nonoilen filament would be even better for heat. Criteria for the design:

• 5015 blower fan
• access to and easy viewing of the BIQU H2 extrusion thumbwheel
• access to the filament loading lever
• good visibility of the nozzle for live z offset adjustment
• adjustable z height to accommodate nozzles with a slightly different length
• get wrenches on the nozzle and heat block without having to remove the cooling duct

In addition to the cooling duct the following are required.

• 2x M3 6mm screws
• 7x M3 flat washers
• 2x M3 25mm screws
• 2x M3 nylok hex nuts (or regular nuts with lock washers)
• 1x 5015 blower fan (24V)

To test the flow I put some instant coffee in the bowl of water to make the water surface easier to see. The pictures of the flow are for the following Fan settings: 000% - 0 003% - 8 006% - 16 012% - 32 025% - 64 050% - 128 100% - 255