ONION-TYPE AIRFLOW RIDGE VENT. The Onion-type Airflow Ridgevent is a cost-effective, low-maintenance way of eliminating heat, moisture, and airborne contaminants from industrial and commercial buildings. Ridge ventilators, do not have moving parts, and provide a long-term solution for increasing energy efficiency by leveraging natural thermodynamic forces. Airflow Ridgevent is perfect for extracting low to medium heat loads with minimal operating costs and maintenance. Best for future solar panel roofs. FEATURES AND BENEFITS • Natural ventilation - No operating expenses • Efficient airflow - cool building • Assemble unit for easy installation. • Knockdown form: cost-effective, damage-resistant. • Extensive size range—suits most designs. • There are no moving parts, thus it requires no maintenance. • Compound design - prevents rainwater entry. • Self-draining requires no additional plumbin • Mesh guarding creates a barrier for birds and vermin. • Suitable for solar panel installation buildings. • Warranty: 36 months