The Pyramid out blowing hood is designed specifically for out blowing the exhaust air on the roof of the buildings.
Pyramid roof hood blows exhaust air upwards with a high velocity and small pressure loss. The unique product structure of the Pyramid includes an outer shell, airflow baffles and top cover. It’s unique construction prevents water penetrating into the duct system, even when the ventilation is sometimes turned off. Pyramid has also very low construction, what makes it difficult to detect.