### Window Duct Adapter - 100mm / 4-Inch Duct Version (STL File for 3D Printing)

#### Product Overview
Elevate your home ventilation setup with this versatile Window Duct Adapter, custom-designed for 100mm (4-inch) ducts. This downloadable STL file empowers you to 3D print a high-quality adapter that securely connects your ducting to a window frame, ideal for exhaust fans, portable AC units, tumble dryers, grow tents, or DIY air circulation projects. No need for invasive installations—just print, assemble, and enjoy improved airflow. As the original creator of this design, I'm excited to offer it directly through my site for makers and hobbyists alike.

#### Key Features
- **Seamless Compatibility**: Fits standard 100mm / 4-inch ducts, ensuring a snug, leak-resistant connection for efficient ventilation.
- **Modular Design**: Includes two main components—the duct adapter and the window vent main body—for easy printing and assembly.
- **Multi-Purpose Fabrication**: Optimized for 3D printing
- **User-Friendly Files**: Provided in both STL and 3MF formats, ready to import into your slicer software like Cura or PrusaSlicer.
- **Durable and Customizable**: Print with your choice of filament for strength and weather resistance; easily scale or modify in CAD software if needed.

#### Technical Specifications
- **File Formats**: STL, 3MF
- **Recommended Print Settings**:
  - Layer Height: 0.2mm
  - Infill: 20-30% (gyroid or cubic for strength)
  - Supports: Minimal, depending on orientation (print flat for best results)
  - Estimated Print Time: 4-6 hours per part on a standard FDM printer
- **Dimensions**: Adapter inner diameter: 100mm; Main body fits most standard window frames (adjustable via scaling)
- **Materials**: Best with PLA, PETG, or ABS for indoor/outdoor use; avoid brittle materials for long-term durability
- **Compatibility**: Works with common 3D printers (e.g., Ender 3, Prusa); no advanced equipment required

#### Why Choose This Adapter?
Whether you're venting a bathroom fan, setting up a grow tent exhaust, routing a tumble dryer vent, or creating a custom air purifier outlet, this adapter solves the challenge of routing ducts through windows without drilling or damaging your home. It's a practical, eco-friendly solution for renters and homeowners—print on demand and reduce waste. Rated 5/5 for printability, utility, and detail by early users, this adapter delivers reliable performance every time.

Ready to print? Add to cart and start building today! If you have questions or need custom variations, feel free to reach out—I'm here to help fellow creators.