A custom-built, sensor-driven ventilation enclosure designed for the safe operation of resin 3D printers in confined workshops.

The CLV-3D is a multifunctional enclosure that addresses fume management and particulate filtration without requiring external exhaust. It features a high-volume recirculating airflow loop, real-time air quality monitoring, and autonomous fan control.

• Recirculating Airflow: Multi-pass filtration using G4 pre-filters and high-capacity carbon filters.
• Distributed Sensor Network: 4-node ESP-NOW system monitoring Internal, External, Plenum, and Filter environments.
• Autonomous Control: Fan speed scales automatically based on VOC (IAQ) and Particulate Matter (PM2.5 and PM10) levels.
• Smart Idle & Self-Healing: Adaptive power management and unified baseline calibration to prevent sensor drift.
• Integrated Display: Real-time dashboard showing system health and telemetry.

For detailed information on how to build, program, and maintain the CLV-3D, please refer to the following chapters:

• Electronics & Control Logic: System architecture, wiring, and autonomous fan logic.
• Cabinetry & Assembly: IKEA parts list, panel ordering, and physical construction.
• Firmware Setup & Calibration: Library requirements, MAC addresses, and sensor calibration.
• Maintenance & Reliability: Filter lifespan, power management, and long-term stability.

Documentation for Wireless Firmware coming soon.

The system consists of four wireless nodes communicating via ESP-NOW:

1. Node 1 (Hub): Main display and user interface.
2. Node 2 (Sensor Stack): Main control logic, fan driver, and internal sensors.
3. Node 3 (Filter Monitor): Monitors pressure after the G4 filters to detect clogging.
4. Node 4 (External Monitor): Reference node for room-air quality.

The as built system also features the following ventilation hardware:

• Fan: Rhino Ultra Fan (150mm / 6" Non-Silenced)
• Filter: AC Infinity 6" Carbon Filter (Intake)
• Pre-filtration: 2x G4 Pleated Panel Filter (24"x12"x1" / EU4)

Other fans and filters can be used but adaptations to the design might be necessary to accomodate them.

• firmware/: Production firmware for all four nodes.
• docs/: Detailed technical documentation and assembly guides.
• PressureCalibration/: Utility script for sensor and pressure calibration.
• 3D Model References/: Contains the master STEP assembly model (CLV-3D Enclosure.step) for the full enclosure.
• 3D Printing Files/: Scaled STL files for all custom housings.
• Cut Enclosure Pieces/: DXF files for laser-cut panels.

Designed by Katz Creates. This project is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0).

See the LICENSE file for the full legal text.