When it comes to roof ventilation systems for vehicles in New Zealand, few names are as well-known and respected as Flettner. Flettner vehicle ventilation systems are manufactured to the highest standards and are so reliable and low maintenance that they can be installed on your vehicle and virtually forgotten about afterwards. Roofquip recommends Flettner roof venting products for all vehicles in need of reliable venting. Proper ventilation is essential for all vehicles to ensure the safety of their occupants. Roof venting products prevent a buildup of heat, stale air, condensation and dangerous fumes that can be dangerous when exposed for long periods of time.