Wall Exhaust Fan Axial 550mm 550W 7500m³/h IP54 with Gravity Louvre, Harmann

Quick Facts – Harmann WAX 550 Wall-Mounted Axial Exhaust Fan

• Blade diameter: 550 mm
• Airflow: 7500 m³/h at 140 Pa pressure
• Power: 550 W at 230V / 50 Hz, single-phase asynchronous
• Ingress protection: IP54
• Construction: Flat motor with external rotor, powder-coated steel plate
• Speed regulation: Voltage-regulation compatible
• Variant: Exhaust (A→) or supply (←V)
• Bonus: Gravity louvre included free of charge

The Harmann WAX 550 is a wall-mounted axial exhaust fan with a 550 mm blade diameter, designed for industrial, commercial and warehouse premises requiring effective ventilation of clean, non-dusty air. The single-phase asynchronous electric motor at 230V draws a maximum of 550 W and builds up a pressure of up to 140 Pa, delivering an airflow of 7500 m³/h. The noise level at 3 metres is 73 dB(A) and the maximum operating temperature is 60 °C.

The construction is based on Harmann's compact flat motor-rotor system with external rotor, where the motor body takes up minimal space. The housing consists of a square mounting plate in profiled steel sheet painted black, with a powder-coated steel grille holding the motor unit and junction box. The rotor blades are made of black-painted steel and dynamically balanced in class G4 according to DIN ISO 1940, providing smooth running and low vibration. The fan is designed for installation in building openings and can only be mounted from the inside (from the room side).

The motor has integrated thermal protection that cuts power at temperatures around 150–160 °C and automatically resets when the motor temperature drops to 90–120 °C. The insulation class is F (155 °C) and the ingress protection class IP54, providing protection against dust and water splashes. The fan is compatible with voltage-based speed regulation, meaning airflow can be adjusted using an external transformer or electronic controller. It is available in exhaust variant (A→) or supply variant (←V) depending on installation requirements.

A gravity louvre is included free of charge with the purchase. The louvre serves as a passive backflow preventer – the blades open under the pressure of the airflow when the fan is running and close by gravity when the flow ceases. This prevents backflow of cold outdoor air, rain, snow or insects into the premises when the fan is not running, saving heating energy.

What is the Harmann WAX 550 exhaust fan and why should you choose it?

The Harmann WAX 550 is an industrial axial fan with a clear design philosophy: compact flat-motor system with external rotor that delivers full airflow without requiring deep installation. The 550 mm blade diameter delivers 7500 m³/h at 140 Pa pressure – sufficient for medium-sized industrial premises where ventilation needs are concrete. The integrated thermal protection with automatic reset is a practical advantage for installations at greater heights where manual reset would be difficult, and the voltage-regulation compatibility means the same fan can be run at reduced speed during periods of lower demand – saving energy and extending service life. IP54 and powder-coated steel plate make the fan suitable for demanding industrial environments. The gravity louvre included free of charge reduces the total installation cost compared to purchasing fan and backflow preventer separately.

What environments is the Harmann WAX 550 exhaust fan suited to?

The fan is suitable for exhaust or supply (depending on model) of clean, non-dusty air in industrial, commercial and warehouse premises. It must not be used for air containing chemically aggressive, corrosive or explosive gases – such applications require ATEX-rated fans with corrosion-resistant construction. Typical applications are production halls, warehouses, commercial kitchens (extraction ducts without greasy air), offices with separate air handling, sports halls and retail premises. The dynamically balanced rotor (class G4) provides low vibration, which matters for mounting on lighter wall constructions. The maximum operating temperature of 60 °C covers normal indoor temperatures even in warm premises.

Technical Specifications

Suitable for: Ventilation installers, industrial technicians, property managers, construction contractors and production managers requiring powerful wall-mounted ventilation of clean air.

Industries: Industrial production, warehousing and logistics, commercial premises, property management, sports and leisure facilities and retail premises.

Please note that we can supply the full Harmann ventilation range. Contact us if you need a different size or model.

Frequently Asked Questions (FAQ)

What is included when purchasing the Harmann WAX 550 exhaust fan and what is the function of the gravity louvre?

When purchasing the Harmann WAX 550 exhaust fan, a gravity louvre is included free of charge in addition to the fan itself. The fan is delivered complete with junction box, motor unit with external rotor and powder-coated steel grille with mounting plate. The gravity louvre is a passive backflow preventer fitted alongside the fan – the blades open under the pressure of the airflow when the fan is running and close by gravity when the flow ceases. This prevents backflow of cold outdoor air, rain, snow or insects into the premises when the fan is not running, saving heating energy and protecting the inside of the fan.

Can the Harmann WAX 550 exhaust fan be speed-controlled and how does the thermal protection work?

Yes, the Harmann WAX 550 is compatible with voltage-based speed regulation, meaning airflow can be adjusted using an external transformer or electronic controller. This allows the same fan to be run at reduced speed during periods of lower ventilation demand, saving energy and extending motor service life. The integrated thermal protection cuts power automatically at motor temperatures around 150–160 °C and resets by itself when the temperature drops to 90–120 °C. This protects the motor in case of overload or blocked airflow without requiring manual reset – a practical advantage for installations at greater heights.

What environments and types of air is the Harmann WAX 550 exhaust fan intended for?

The Harmann WAX 550 exhaust fan is designed for exhaust or supply of clean, non-dusty air in industrial, commercial and warehouse premises – depending on which variant is ordered (exhaust A→ or supply ←V). The fan must NOT be used for air containing chemically aggressive substances, corrosive gases or explosive gases – such applications require ATEX-rated fans with specifically corrosion-resistant construction. Typical applications are production halls, warehouses, commercial premises, sports and leisure facilities and similar premises where ventilation needs are concrete but the air is of normal quality. Powder-coated steel plate and IP54 enclosure make the fan suitable for normal industrial environments with dust and water splashes.