The HTP Dust Deflector is designed to allow air to flow through the vents on your caravan while guiding dust particles away from the intake areas. Fit the dust deflector over the vent, with its open end oriented toward the rear of the caravan. This placement ensures that as the caravan moves forward, the deflector guides air and dust away from the vent, allowing clean air to enter from the rear. The rear-facing open end leverages the natural airflow, minimizing the amount of dust that reaches the vent while still maintaining effective ventilation.