Lijan Greentech is Solution Provider in Ventilation. We Manufacture and Supply Turbo Roof Ventilator Fans, Louvers etc. Turbo Ventilator Fans should be Installed Perpendicular to Ground Level for best result. Some People Install Wind Turbo Ventilator Fans Perpendicular to Roof Level on Sloped Roof which will Cause More Wear and Tear on Rotating Parts and Ventilators Become Slower in the Long Run and May Come to Stand Still. A Stagnant Roof Ventilator on a Sloped Roof Cause Rain Water Entry Inside Building.
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