Duct Fan 100/200100 mm ML Professional Tubular Fan, Harmann

Harmann ML Duct Fan – Efficient and Quiet Ventilation

The Harmann ML is a powerful and energy-efficient duct fan for supply and exhaust air ventilation in residential buildings, offices, shops, and other commercial environments. Its advanced diagonal impeller technology and compact design make it ideal for installations with limited space.

Key Features

• Unique diagonal impeller for optimized airflow
• Available in multiple sizes: 100 to 200 mm
• Three-speed motor with option for external speed control
• IP44 protection class – durable and reliable build
• Modular design for easy installation and maintenance
• Impact-resistant and UV-resistant polymer housing

Advantages of Harmann ML

• Flexible installation in any position
• Rotatable motor unit for easy access in tight spaces
• Minimized airflow turbulence for quieter operation
• Long lifespan with ball bearings and thermal protection
• Suitable for systems with narrow ducts or multiple components

Applications

• Residential houses and villas
• Offices and retail spaces
• General ventilation in public and commercial buildings
• Ventilation systems with filters, silencers, or heaters

Control and Operation

The fans are equipped with a three-speed motor (230V) and can be controlled via an external switch or voltage control. For basic operation, the phase wire is connected to one of the three speed terminals (LA, LB, or LC). Some models also support an adjustable delay-off timer.

Harmann ML Duct Fan – Technical Specifications

Motor: Three-speed asynchronous electric motor 1~230V, 50Hz. A traditional AC motor with selectable speeds using either:

• fixed connection (via jumper)
• or external switch / voltage regulator

Qmax = Max airflow / Δpmax = Max pressure / LPA = Sound level / Pnom = Power consumption / tOPER = Operating temperature

FAQ – Frequently Asked Questions

Can the fan be installed under a suspended ceiling?

Yes, the design allows flexible installation even in tight spaces like above ceiling tiles, thanks to the rotatable motor section.

Is the fan suitable for both supply and exhaust air?

Yes, it works great as both intake and exhaust fan in ventilation systems.

How is the fan speed controlled?

Using either an external 3-speed switch or a voltage regulator in the range of 160–230V.

Does the fan require maintenance?

No, the fan can be easily opened and cleaned without removing the ductwork.

Comparison ML vs. ML EC fans: