Datanly Trailer RV Vent Covers — Black 4-Pack Half-Moon Side Air Vents, Low-Profile Weatherproof

Datanly Black 4-Pack enclosed half‑moon side vents are two‑piece trailer vent covers designed to improve airflow in RVs, campers, trailers and cargo haulers while blocking water and insects.

These vents are a practical, no-frills upgrade for any enclosed trailer or recreational vehicle that needs passive ventilation without compromising weather protection. Each set includes four black two‑piece vent covers built to create cross‑flow when installed facing forward on one side and rearward on the opposite side. The low‑profile half‑moon outer shell draws fresh air in and routes warm, smoky or stale air out, keeping cargo, equipment and living spaces better ventilated during travel or storage.

How do these vents increase ventilation in an enclosed trailer?

When installed as a matched pair on opposing walls—one facing forward and one facing backward—the vents create a simple passive airflow path. Air enters through the forward‑facing vent, circulates inside the cargo area, and exhausts through the rearward vent, reducing heat buildup and dissipating odors and fumes.

• Install in opposing directions to encourage cross‑flow ventilation.
• Half‑moon outer design funnels air while shedding water.
• Two‑piece construction allows flush interior trim for neat finish.

What are the measurements and installation requirements?

Each vent requires a round mounting hole about 3 inches in diameter. The visible outer shell measures roughly 8 × 6 inches and the circular flange on the insert is approximately 4.25 inches in diameter, so allow space for the flange and screw pattern when positioning the vents.

• Required hole diameter: ~3 inches.
• Outer face dimensions: about 8" × 6".
• Flange diameter on round insert: ~4.25".
• Two‑piece assembly fastens from inside/outside for a secure seal.

Will these vents keep rain and insects out while letting air in?

The half‑moon outer shell and internal baffle design let air pass while deflecting water and preventing direct insect entry. The shape helps channel airflow but still provides a barrier to splash and pests, making it suitable for outdoor and road use.

• Outer shell angle diverts water away from the intake.
• Internal baffle prevents straight‑line access for bugs.
• Black finish minimizes visible dirt and blends with many trailer exteriors.

Who is this product for? These Datanly vents are aimed at DIY trailer owners, RV enthusiasts, and small‑fleet operators who want a simple, durable ventilation upgrade. They’re useful for campers, ATV and motorcycle trailers, utility trailers, and light truck enclosures that need continuous passive airflow to reduce heat and remove fumes without electrical systems.