Scientific blog · Efficiency and compliance

Motors and fans for fume extraction: European requirements, consumption and pre-purchase checks

Artur Cokaj · 16 October 2026

IE classes, new European fan rules and installation performance: which documents and data are needed when selecting fume and odour extraction.

An extraction unit can have a high-efficiency motor yet fail to provide the flow rate required by the installation. When capturing fumes and odours, checking kilowatts alone leaves the decisive question unanswered: how much air will actually move through the hood, treatment and ducts? Before purchase, distinguish three checks: motor efficiency, fan performance and conformity of the machine supplied.

IE classes are not a universal label

EU Regulation 2019/1781 (consolidated text) regulates certain categories of induction motors and variable speed drives. Power, poles, voltage, duty and mode of operation all help define its scope; exclusions are provided.

For three-phase motors within scope other than Ex eb motors, since 1 July 2021 the minimum level has been IE3 between 0.75 and 1,000 kW and IE2 from 0.12 to below 0.75 kW. Since 1 July 2023, IE4 has applied to three-phase motors from 75 to 200 kW with 2, 4 or 6 poles, excluding brake motors and explosion-protected motors. For single-phase motors within scope, the IE2 requirement has applied since the same date. There is therefore no blanket IE4 obligation for every extraction unit.

The European Commission specifically explains that IE levels depend on product characteristics. When reviewing a quotation, the class must be associated with the identified motor and applicable regime: a designation alone does not allow a complete comparison.

Fans: what changes from July 2026

EU Regulation 2024/1834 (consolidated with amendment 2025/2481) generally applies from 24 July 2026 to placing on the market or putting into service fans with electrical input power at their best efficiency point between 125 W and 500 kW, including those integrated into other products. Its scope includes exclusions: for example, fans integrated into cooker hoods with a maximum total power attributable to the fans below 280 W. For special applications, the declared intended use, design and marketing are relevant.

The previous Regulation 327/2011 is repealed from 24 July 2026, but conditional transitional provisions remain: until 24 July 2027 for specified integrated fans and until 24 July 2037 for certain spare parts. The conditions in Annex II must be checked: these extensions cannot be used indiscriminately. Fan efficiency is also a different performance measure from the motor's IE class alone.

Available flow rate results from the interaction with the installation

The US Department of Energy's technical manual Improving Fan System Performance describes how ducts, filters and other components create resistance to flow. Particle build-up in filters can increase pressure losses. The 2003 document is used here for these established physical principles, not for current European requirements.

The design consequence is practical: request available flow rate and pressure at the same operating point. The maximum flow rate stated in a catalogue does not demonstrate the flow achievable after bends, filters and treatment are added. Effluent temperature must also remain within the declared conditions of use. The relationship between cooling and cleaning is discussed in the article on particulate dynamics and flue gas thermodynamics.

The inverter requires appropriate control settings

Speed control allows operation to adapt to varying needs, as illustrated in the same DOE manual. Installing an inverter is not, however, enough to claim a predetermined saving. Operating conditions, hours of use and required performance must be considered. Reducing speed without checking capture can compromise the very service for which the installation was purchased.

A component's CE marking does not complete the assessment

The European Commission's machinery framework page confirms that, before 20 January 2027, Directive 2006/42/CE remains central; from that date, EU Regulation 2023/1230 generally becomes mandatory. Assessment must concern the product actually supplied. The presence of CE-marked components does not replace assessment of the complete assembly.

Article 5 and Annex VII of Directive 2006/42/CE link machine conformity to requirements, technical documentation, instructions and a declaration. The technical file must be available to the authorities; this is not the same as an obligation to provide the complete file to every customer.

Five checks before ordering

1. Identify the effluent, temperature and operating conditions, indicating the planned treatment.
2. Agree the required flow rate and pressure together, checking them on the relevant curve.
3. Obtain motor identification and data, including the applicable energy requirement.
4. Check the declaration, instructions and intended use of the machine supplied.
5. Define maintenance, accessibility and operating checks, also coordinating the acoustic assessment.

These are technical selection criteria to adapt to the project. For an ETC supply, discussion must start with these data: extraction and treatment equipment must be compatible with the planned network. Acoustic selection requires a specific assessment, explained in the article on noise from extraction fans and hoods. Ordering before these points are clarified postpones essential decisions until correcting the installation may be more costly.

Sources and updates

Consulted on 16 October 2026. EUR-Lex texts and institutional documentation are used. The consolidated fan regulation consulted includes the corrigendum published on 4 September 2026, correcting the density reference in Annex I, point 14. The requirements summarised do not replace assessment of the scope applicable to the individual product.