Engineered for marine environments, the Attwood Turbo 4000 Series II 4in 12v White (Model 1749-4) delivers robust ventilation where you need it most—engine compartments, galleys, bilges, and heads. Water-resistant 12-volt operation and a compact 4-inch design make it a trusted choice for boats and vessels.

Featuring a patented in-line design and a five-blade impeller, it maximizes airflow and efficiency. The blade sweep and pitch are engineered for a high lift coefficient, boosting airflow speed for optimized ventilation while keeping noise levels low.

Low amp draw means longer blower and battery life. This Attwood blower is up to four times more efficient than competitive options and draws up to 40% fewer amps, helping you conserve power on a busy voyage.

Durability meets practicality with a rugged engineered plastic housing that resists deformation during installation and prevents blade-to-housing interference. This design ensures reliable performance in tight spaces and harsh marine conditions.

Despite its powerful output, system airflow can exceed older inline blowers by as much as 25%, and the unit matches the airflow of competitors while delivering significantly reduced noise output.

Installation and compatibility: This 12-volt, water-resistant blower is marine ignition protected and includes built-in mounting feet for easy vertical or horizontal installation. It is designed for use with 4-inch interior diameter ventilation hose and installs with #10 fasteners.

Specifications and Applications

• Model: 1749-4
• Voltage: 12V
• Fan: Five-blade
• Housing: Engineered plastic, water-resistant
• Install orientation: Vertical or horizontal (built-in mounting feet)
• Hose size: 4-inch interior diameter ventilation hose
• Fasteners: #10
• Protection: Marine ignition protected
• Efficiency: Up to 40% fewer amps than competitors; up to 25% more airflow than older inline blowers