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Filter LONGWELL No Power Roof Fans models by airflow, static pressure, voltage or size. Every model on the Fan Selector lists its measured or digitised curve, dimensional drawing and datasheet.
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Library: Ø24–1,000 mm, single units up to about 61,000 m³/h — larger duties go straight to an engineer. Prefer to talk it through? Send your specs to an engineer

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No Power Roof Fans

Utilizing natural thermal convection and wind, Longwell’s zero-power roof vents offer a passive and energy-independent ventilation method. Their clever design continuously extracts heat and stale air without any operating costs.
The Longwell design provides a sustainable, maintenance-free solution for improving air quality and reducing heat buildup. It’s an effective choice for enhancing natural airflow in various structures.