1. 300mm ventilator
2. Anti-corrosive stainless metal
3. 15 years warranty

Model: 200mm, 300mm, 500mm, 800mm 880mm
Materials: Japanese NSK bearing; Fireproofing reinforced nylon trestle or metal trestle; Rivet to connect.
Benefits: Light weight, high revolving speed, strong corrosion resistance, high air exhausting efficiency, sturdy, durable, clean and smooth, easy maintenance. No need power cost
Working Condition Temperature difference between indoor and outdoor is 0.45, It begins to revolve at the wind speed of 0.12m/ s.
Roofing Angle: Applied in different roofing in the scope of 0-22.5° Oblique angle.
Warranty: 15 years
Applicable scope: Industrial workshop, commercial and civil housing.
Origin of product: China.