Description
VWD Overlander Series Half-Slider Van Bunk Window (OVR4015) is the largest bunk window in the Overlander lineup and is designed for builders who want maximum airflow, expansive views, and a more open living space. This window dramatically improves how your van feels inside, especially in bunk and sleeping areas, making it ideal for full-time van life, extended trips, and premium camper builds.
The OVR4015 is a universal-fit bunk window commonly installed in Sprinter Vans, Transit Vans, ProMaster Vans, as well as Express, Savana, Econoline, and other custom conversions. Fitment is based on measurements rather than year, make, or model, giving builders flexibility across platforms.
With its larger overall size and oversized vent opening, this window delivers significantly more ventilation and natural light than standard bunk windows. The result is a bunk area that feels less enclosed, stays cooler at night, and maintains better airflow throughout the van.
The half-slider design allows controlled airflow without fully opening the window. The large 17-13/16" x 11-7/8" vent opening helps move heat out, reduces condensation, and improves cross-ventilation when paired with roof fans or windows on the opposite side. A built-in bug screen keeps insects out so the window can stay open comfortably.
Solar privacy glass with a 17% UV rating reduces heat gain, protects your interior, and maintains daytime privacy. The dark tint gives your van a clean, finished exterior look while still letting in ample natural light.
Installation is handled using a clamp ring system for a secure, no-weld install. A 3M foam seal is included to help create a tight, weather-resistant seal on metal van bodies. Built-in top and bottom drainage channels help manage water during rain or washing. Does not fit fiberglass extensions.
Important Installation Note: Due to the OVR4015's larger size, extra care should be taken when installing on vans with steeper body curvature, such as the Transit Van. Proper cutout preparation, surface leveling, and even clamp pressure are critical to ensure correct seating and long-term performance.
Why Builders Choose the OVR4015
- Largest bunk window option for maximum airflow and light
- Makes bunk areas feel open instead of enclosed
- Excellent cross-ventilation for sleeping comfort
- Clean, modern exterior appearance
- Ideal for premium and full-time camper builds
Key Specifications
- Fitment: Universal Fit (YMM search does not apply; verify by measurements)
- Compatible Vans: Sprinter, Transit, ProMaster, Express, Savana, Econoline, and more
- Glass Color: Solar Privacy Glass
- UV Rating: 17%
- Installation Type: Clamp Ring
- Seal Included: 3M Foam Seal
- Frame: Black Aluminum
- Manufacturing Country: China
- Manufacturer Warranty: 1 Year
- Notes: Larger window; extra care required on heavily curved van bodies
Measurements
- Outer Dimensions: 41-5/16" x 16-5/16"
- Cut-Out Dimensions: 40" x 15"
- Vent Opening Size: 17-13/16" x 11-7/8"
- Clamp Ring Wall Depth: 1/8"
If you want a bunk window that delivers maximum ventilation, larger views, and a premium feel, the VWD Overlander Series Half-Slider Van Bunk Window (OVR4015) is a standout choice for serious van builds.
