According to industry experts consulted as part of a government-backed review of the UK’s Ecodesign Regulations for electric motors and variable speed drives (VSDs), that scenario plays out on sites across the country—and it routinely leaves the biggest energy savings untouched. The motor gets upgraded, but the system it sits in does not.

Thomas Marks, Director General at the Association of Electrical and Mechanical Trades (AEMT) , argues that focusing narrowly on motor efficiency ratings is, at best, an incomplete strategy. At worst, it can be an expensive distraction.

The Blinkered Upgrade

The efficiency classification system for motors—running from IE1 through to IE5—has undeniably driven improvements in products entering the market. Regulations have successfully phased out the least efficient motors, and the difference between, say, an IE2 and IE3 motor represents a meaningful reduction in running costs for many applications.

But specialists are increasingly vocal that chasing the next efficiency class on the motor nameplate can lead operators to miss the larger picture. As Johnathan McNamee from Hayley 24/7 explained: “The whole concept of going from IE2 to IE3, or three to four, can be a little bit blinkered. Sometimes people don’t look at the whole system enough.”

The point is not that motor efficiency standards are irrelevant—they are not. It is that the motor is just one component in a wider mechanical system, and often not the one with the most room for improvement. The gains from a motor upgrade can be dwarfed by issues such as:

• An inefficient gearbox
• A poorly aligned drivetrain
• A chain drive running at the wrong tension
• A pump that has been manually throttled to restrict flow

Fraser Lynch of Westin Drives made that point with a vivid example: “We went out, fitted an inverter and an energy-efficient motor—then noticed the pump was manually valved off to restrict flow. Just opening that valve saved far more than anything we’d just done.”

That quote from a job at a quarry captures the problem neatly. A pump had been running against a partially closed manual valve, wasting energy continuously. Opening the valve after installing a VSD cost nothing and delivered savings that eclipsed the entire investment in new equipment.

The Budget Disconnect

There is a structural reason why sub-optimal decisions keep being made, and it has little to do with technical ignorance. It comes down to how budgets are allocated. In many organizations, engineering departments are responsible for procurement and maintenance, but energy costs sit in a completely separate budget. The engineer tasked with replacing a failed motor is measured on capital expenditure, not on kilowatt-hours saved.

Andy Patten of ADC Electricals observed: “Engineering departments don’t really have that much interest in what the efficiency ratings are or the energy savings, because ultimately that doesn’t come out of their budget. Their focus is simply on what their budget is and how much the unit costs.”

The consequence is predictable: the most energy-efficient option is rarely selected at the point of purchase. The fix requires organizational change as much as technical change—aligning procurement decisions with whole-life energy costs through internal charge-back mechanisms, life-cycle cost analysis tools, or ensuring energy managers have a seat at the procurement table.

Where the Real Gains Are

Experts agree that for most motors in service, the incremental gains from moving up another efficiency class are becoming marginal. The easy wins from motor design have largely been captured. As Andy Patten put it, the industry has “reached the peak where it’s a lot of money to spend to save a fraction of a percent.”

The better opportunities now lie elsewhere. Three areas worth examining on any site:

1. Variable Speed Drives (VSDs): Adding a VSD to an application that runs at fixed speed can deliver substantial savings, often with a rapid return on investment. Pumps and fans running at full speed but with throttled output are prime candidates.
2. Right-Sizing: One of the most common sources of energy waste is oversized motors. A motor running well below its rated load operates inefficiently. Replacing it with a correctly sized unit can realize immediate savings.
3. The Wider Drivetrain: Gearboxes, couplings, belts, and bearings all introduce losses. Unlike motors, these components have seen far less regulatory attention. A thorough system audit may reveal that the gearbox or pump is a greater source of inefficiency than the motor driving it.

Measure Properly Before You Act

Any assessment of system efficiency is only as good as the data behind it. Extended monitoring that captures performance data across representative operating cycles—ideally over several weeks—provides a much more accurate picture of where energy is actually consumed. Condition monitoring technology has advanced significantly and is increasingly accessible for industrial operators of all sizes.

A Practical Framework for Equipment Owners

The takeaway is not to ignore motor efficiency standards—compliance remains a legal requirement. Instead, treat motor replacement as an opportunity for a broader conversation. When a motor comes up for replacement, ask these questions:

• Is this motor the right size for the actual load it drives?
• Is the driven equipment operating at its designed efficiency?
• Could a VSD be justified on energy-saving grounds alone?
• When were the gearbox, coupling, and transmission components last assessed?
• Who in the organization is looking at the lifetime energy cost of this asset?
• Has enough operating data been captured to understand real-world performance?

These questions cost nothing to ask. The answers could be worth considerably more than the most efficient motor on the market.

That’s why LEWA has enhanced its Ecoflow LDH boxer pump platform: a targeted engineering refinement that delivers up to 20% greater efficiency without compromising the precision, hygiene, or reliability that specifiers demand.

Announced on May 6, 2026, this isn’t just an incremental update. It’s a strategic response to converging market pressures: rising energy costs, tightening ESG expectations, and the need for total cost of ownership optimization in critical process applications.

What Is the Ecoflow LDH Boxer Pump?

The Ecoflow LDH is LEWA’s hygienic, high-pressure diaphragm metering pump engineered for demanding applications where precision, cleanability, and durability matter most:

Boxer pump design – Dual opposing plungers balance forces, reducing vibration and mechanical stress
Hygienic construction – Smooth surfaces, crevice-free design, and compliance with FDA, EHEDG, and 3-A standards
High-pressure capability – Handles demanding dosing and transfer applications up to 1,500 bar
Modular actuation – Compatible with LEWA’s full range of drives, controls, and smart monitoring options

Originally developed for pharmaceutical and biotech applications, the Ecoflow LDH platform has earned trust across food & beverage, cosmetics, and fine chemical processing.

What’s New? The 20% Efficiency Gain Explained

LEWA’s latest enhancement focuses on three interconnected engineering refinements:

The result? Up to 20% lower energy consumption across typical operating profiles—without sacrificing flow accuracy, pressure capability, or hygienic performance.

“Efficiency gains of this magnitude don’t come from marketing—they come from meticulous engineering. By optimizing every element of the hydraulic and drive system, we’ve delivered real-world energy savings that compound over the pump’s lifecycle.”
— LEWA Product Engineering Team

Why This Efficiency Gain Delivers Real Value

For engineering and procurement teams, that means: Better performance, lower risk, and clearer ROI—without compromising on quality or compliance.

Applications Where Efficiency Matters Most

Smart Connectivity: Efficiency Meets Intelligence

For facilities embracing digitalization, the enhanced Ecoflow LDH supports LEWA NIC® controls with Industry 4.0 integration:

Real-time energy monitoring – Track kWh consumption per batch, shift, or production run for granular cost allocation
Adaptive speed control – Automatically modulate pump speed to match process demand, avoiding unnecessary energy use
Predictive maintenance alerts – Detect efficiency drift or mechanical wear before performance degrades
Batch documentation – Automatically log dosing accuracy, energy use, and operational parameters for regulatory compliance (FDA 21 CFR Part 11, EU GMP Annex 11)

No proprietary protocols. No complex middleware. Just open, secure connectivity that works with your automation architecture.

Sustainability Through Engineering Excellence

Efficiency isn’t just about speed—it’s about resource intelligence:

Lower carbon footprint – Reduced energy consumption directly decreases Scope 2 emissions per unit produced
Less thermal waste – Lower heat generation reduces cooling load in climate-controlled environments
Extended component life – Reduced mechanical stress and thermal cycling delay replacement, lowering embodied carbon
Process optimization – Precise dosing minimizes chemical overuse, reducing waste and environmental load

In an era where ESG performance influences procurement, financing, and community trust, intelligent pump design delivers measurable competitive advantage.

Retrofit-Friendly: Upgrade Without Overhaul

A critical differentiator: LEWA’s efficiency enhancements are designed for brownfield adoption:

Dimensional compatibility – Many upgraded components fit existing Ecoflow LDH installations
Modular upgrades – Replace fluid end or drive package independently based on ROI priorities
Phased implementation – Start with monitoring to quantify savings, then invest in hardware upgrades
Performance validation – LEWA provides efficiency testing protocols to document ROI for capital approval

No “rip and replace” required. Just intelligent upgrades that extend the value of existing assets.

Leadership Perspective

“Our customers don’t just buy pumps—they invest in outcomes. By delivering 20% greater efficiency in the Ecoflow LDH, we’re helping them achieve more with less: less energy, less waste, less operational risk. That’s engineering with purpose.”
— LEWA Executive Leadership