24v 4" in-line bilge blower 270 cfm, engineventilation / cooling fan 4" in-line blower 24 volt airflow 270. 0 cfm (7660l / per minute) 3 amp draw 12v / 24v For ventilation of bilges, heads, galleys and engine compartments. Bus ventilation (engine and bathrooms)Used to remove dangerous fumes, stale air and odours. Corrosion resistant abs plastic housing.Built in mounting feet allow easy vertical or horizontal installation. Very low current draw, High volume air flow and long lifeSealeds motor shaft for moisture protection.