FANS / Cross Flow Fans

LONGWELL cross flow fans are widely used in stove jacket cooling, storage heaters, wood-burning stoves, underfloor convectors, air doors, air conditioners, and heaters. These applications demand a ventilation system with low installation height and high air flow rates. They provide high air flow rates, excellent air throw, and extremely good noise characteristics.

The generally small impeller diameter (from 25 mm to 150 mm) to impeller length (up to 1200 mm) ratio permits an extremely shallow, flat design. The large intake and outlet cross-section makes it possible to achieve a high air throughput rate with low flow velocities. Further characteristic features of LONGWELL cross flow fans are a long air throw and extremely low running noise.

LONGWELL cross flow fans are available with an asymmetrical shaded-pole motor, a capacitor motor, or a GreenTech EC motor with integrated commutation electronics (including tach output and PWM or analog input) to suit the specific application. With GreenTech EC motors, it is possible to select a higher speed than for shaded-pole and capacitor motors, to overcome higher back pressures, for example. Using appropriate sensors, the cross flow fan featuring GreenTech EC technology automatically sets the required operating points and conveys the exact amount of air required.

The advantages of LONGWELL tangential blowers :

• Low noise with high air flow rates and low back pressures
• High air throughput with low flow velocities
• Expanded-width discharge area ensures that air makes good contact with ducts and surfaces to be cooled
• Extremely shallow design
• Moisture-proof versions for refrigeration applications, for example
• Higher speeds with GreenTech EC motors than with AC motors
• Power adjustment via PWM signal or 0–10 V analog voltage