+AIR FILTER SYSTEM+ [enclosure a1 mini]

Air Filter System - ⬇️Technical Description⬇️

👉What Is It

An air filtration and recirculation system for 3D printer enclosures (Bambu Lab A1 Mini). It combines static intake aspiration + filtration to maintain a controlled environment.

Main Components

• 92x92mm Fan (Arctic P9 Max or equivalent) – static intake aspiration
• G3 Filter (standard range hood filter) – filters dust and particulates
• TPU Gasket – airtight seal
• Fan mount + Grid – support and protection
• Duct + Filter cover – quick-release for cleaning
• Control box with LED indicators (red: power, green: filter status)

How It Works

1. Fan aspirates internal air through G3 filter
2. Filtered air recirculates inside enclosure (closed-loop recirculation)
3. Blocks external dust, maintains controlled humidity
4. Quick disassembly (30 sec) for filter change/cleaning

Real-World Results (Tested)

• Temperature: Stable 23-24°C (even with build plate at 70-80°C for 6-8 hours continuous printing)
• Humidity: Reduced from 55-60% to ~30% internal
• Protection: Zero internal dust, no warping or moisture absorption
• Efficiency: Perfect PETG prints without external VOC release

👉Assembly Specifications

• Panel hole: 80-85mm (round or square)
• Positioning: High on panel, 10-15cm clearance from walls
• Airflow orientation: Air points TOWARD THE OUTSIDE (intake aspiration)
• Bolts: M5x60mm (4x), M4x40mm (4x)
• Assembly time: >10 minutes

🎯Unique Advantage

It's not just filtration—it's a complete climate control system that enables long, stable prints without overheating, perfect for PETG and technical filaments.

KUROSHELL Air Filtration System - Project Overview

The filtration system for enclosures is not new, but what I designed, developed, and built was driven by specific needs: room humidity constantly at 55/60%, dust, and protecting the printer from accidental impacts.

After extensive research and many hours in Fusion360 (LOL), I designed my own version—my own interpretation of an enclosure for a printer like the A1 Mini.

This is just one part of the entire KUROSHELL project: the filtering element for fumes produced during printing* and air recirculation that would otherwise exceed 35/40°C internally. The Bambu Lab A1 Mini is not designed to operate at those temperatures (not recommended).

This negative pressure filtration system is one part of the complete system:

1. Filtration element with static intake fan – extracts air and fumes
2. Filtered air inlet element – cools the print chamber by introducing fresh filtered air

Real-World Results

I'm confident that other users and serial printers will have similar needs to mine, and I hope they'll try it and experience the benefits I've found.

After several months of regular printing, I can confirm that with my negative pressure filtration system:

Temperature remains stable at 23-24°C even with the print bed at 70/80°C for 6-8 hours of continuous printing—without opening the front door. (Which is pointless anyway due to drafts and dust ingress.)

Next Steps

If this gains traction, I'll upload a detailed video to YouTube showing the complete assembly process and full project tutorial.

Thank you for taking the time.

Tommaso