What Is a Roof Fan? Vertical vs Horizontal Discharge Selection
Roof fans are compact exhaust solutions used to discharge polluted, warm or stale air from a building to the outdoor environment through the roof.
What does a roof fan do?
Roof fans are compact exhaust solutions used to discharge polluted, warm or stale air from a building to the outdoor environment through the roof.
When is vertical discharge preferred?
Vertical-discharge solutions are considered where exhaust air needs to be carried upward and away from roof level. Nearby air-intake points and the overall roof layout should be taken into account.
When is horizontal discharge preferred?
Horizontal-discharge fans can provide a compact exhaust solution where roof geometry and surrounding conditions are suitable. The final choice should be based on the installation layout and required discharge direction.
Key selection criteria
Required airflow, system resistance, roof installation details, rain and outdoor exposure, noise level, service access and the properties of the transported air should be evaluated together.
Vitlo roof fans
The Vitlo range includes CRU vertical-discharge and CRH horizontal-discharge roof fans, together with CRH/ATEX roof fan options for hazardous areas.