Instrumentation · 9 min read · Updated November 2026
IE4, IE5 and the EU Ecodesign Rules: Choosing Motors and VFDs for Pumps and Fans
Regulation (EU) 2019/1781 made IE3 the floor for most motors in 2021 and IE4 mandatory for 75–200 kW two-, four- and six-pole motors from July 2023, with drives held to IE2 efficiency class for the first time. For anyone specifying pumps and fans into Europe — or buying from a European OEM — the rules decide what you can ship. What they say, where the exemptions are, and when an IE5 synchronous reluctance package beats everything.
Motors consume roughly two thirds of industrial electricity in Europe, which is why the EU regulates their efficiency with more precision than almost any other product class. The current instrument is Commission Regulation (EU) 2019/1781, amended by (EU) 2021/341, applying the IEC 60034-30-1 efficiency classes (IE1 lowest to IE5 highest) and, for the first time, IEC 61800-9-2 classes for variable-speed drives. The regulation applies to products placed on the EU market — so a Vietnamese OEM shipping a pump skid to Rotterdam is bound by it just as a German one is, and a plant buying a replacement motor must buy a compliant one.
What the regulation requires
| Since | Motor category | Minimum class |
|---|---|---|
| 1 July 2021 | Three-phase, 0.75–1000 kW, 2/4/6/8 pole, 50/60 Hz | IE3 |
| 1 July 2021 | Three-phase, 0.12–0.75 kW | IE2 |
| 1 July 2021 | Variable-speed drives 0.12–1000 kW | IE2 (per IEC 61800-9-2) |
| 1 July 2023 | Three-phase, 75–200 kW, 2/4/6 pole (non-Ex, non-brake) | IE4 |
| 1 July 2023 | Single-phase ≥ 0.12 kW; Ex eb motors 0.12–1000 kW | IE2 |
Exemptions exist but are narrower than people assume: motors fully integrated into a product such that efficiency cannot be tested separately (some pump designs), motors for explosive atmospheres other than Ex eb (Ex d is covered — it must be IE3), motors operating entirely immersed, motors for temperatures below −30 °C or above +60 °C ambient, and brake motors, among others. The practical point for an OEM: an IE3 or IE4 motor is a purchase specification, not a design choice, and the motor nameplate and documentation must state the class and losses. Market surveillance authorities do check.
Where the drive comes in
The 2021 rules introduced efficiency classes for drives: IE2 is the minimum (losses at 90 % speed / 100 % torque no worse than 25 % above the reference losses). Every current drive from the major makers — ABB ACS580/880, Danfoss VLT, Siemens SINAMICS G120, Yaskawa GA500/700, Delta MS300/C2000, Schneider ATV320/600 — is IE2 and most are published as such in their datasheets. More interesting is the "extended product" approach in EN 50598 / IEC 61800-9: the motor-plus-drive system is classified as a Power Drive System (PDS) with classes IES0–IES2. For pumps and fans the system efficiency at part load is what matters, and this is where the choice of motor technology changes the answer.
IE4 and IE5: induction versus synchronous reluctance versus permanent magnet
- IE4 induction motors exist (copper rotors, more active material) and are the simplest compliance route for 75–200 kW: same drive, same control, a bigger and more expensive motor.
- Synchronous reluctance (SynRM) motors — ABB's IE5 SynRM range, Siemens SIMOTICS reluctance, Danfoss/KEB and others — have a rotor with no magnets and no cage, so rotor losses are near zero. They reach IE5 (super premium) in the same frame size as an IE3 induction motor, run cooler (longer bearing and insulation life) and keep efficiency at part load, where pumps and fans spend most of their life. They require a drive with SynRM control — the ACS580/880, VLT FC 302/202 and SINAMICS G120 all have it — and cannot run direct on line.
- Permanent magnet (IPM/SPM) motors are also IE5-class with the highest power density, used where size matters (compressors, fans in units). Rare-earth cost and supply are the drawback, and they need a drive with PM control (all modern drives have it).
Our recommendation for a new pump or fan drive in the EU: for duty cycles with significant part-load operation and above about 5 kW, a SynRM motor with an ACS580 or VLT AQUA typically pays back the premium over an IE3 induction package in 1–3 years at European energy prices, and is simpler to certify as IES2. For small motors under 5 kW the induction motor plus an IE2 drive is still the pragmatic choice.
Retrofit situations
Replacing a failed motor in an existing installation inside the EU must use a motor meeting the class in force at the time of placing on the market — you cannot buy a new IE2 150 kW motor. Rewinding an existing motor is permitted (it is repair, not placing on the market), but a rewound motor usually loses efficiency; for motors above 30 kW that run more than 4,000 hours per year, replacement with IE4/IE5 is normally cheaper over five years than rewinding. When an old drive is replaced — the ACS800 to ACS880 case — check whether the drive has a SynRM mode and consider doing the motor at the same time.
Pump-specific rules
Water pumps have their own Ecodesign regulation ((EU) 547/2012, Minimum Efficiency Index for clean-water pumps) and circulators have (EU) 641/2009; the EU has been consolidating these into an "extended product" approach for pump units including motor and drive. For pump skids this means the hydraulic efficiency of the pump, the motor class and the drive class are all assessed; a pump OEM should expect the packaged unit to be evaluated as a whole. Fans ≥ 125 W fall under (EU) 327/2011 with their own fan-efficiency grades.
Outside the EU
The US sets motor efficiency under DOE 10 CFR 431 (roughly IE3 equivalent, "NEMA Premium"), with "small electric motor" and "dedicated-purpose pool pump" rules; Canada, Japan, Korea, China (GB 18613, IE3 since 2021) and Vietnam (TCVN 7540, IE2/IE3 roadmap) have their own schemes. If you export widely, specify IE3 as the global floor and IE4/IE5 for Europe and for anything with a long duty cycle, and keep the test reports with the technical file.
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Quick answers
Can I still buy an IE2 motor in the EU for a spare?
For three-phase motors 0.75–1000 kW, no — a motor placed on the EU market must be IE3 (IE4 for 75–200 kW 2/4/6 pole). Exemptions are narrow (integrated, immersed, extreme ambient, brake motors, some Ex types). Repairing or rewinding an existing motor is allowed.
Does my VFD need an efficiency class too?
Yes. Since July 2021 drives from 0.12 to 1000 kW placed on the EU market must meet IE2 per IEC 61800-9-2 and state it in the documentation. All current drives from the major manufacturers comply.
Can a synchronous reluctance motor run without a drive?
No. SynRM and permanent-magnet motors need a drive with the matching control mode; they cannot start direct on line. For applications that must run across-the-line, an IE4 induction motor is the compliant option.