You get an RFQ back from a US distributor and one line stops you cold: “FEI ≥ 1.00 required per ASHRAE 90.1.” Maybe you’ve seen that string of characters before. Maybe you haven’t. Either way, you now need to know what it means, where to find the number, and what happens if your fan doesn’t meet it.
The fan energy index, or FEI, is the compliance metric that replaced an older standard called FEG in ASHRAE 90.1 starting in 2019. It measures how a fan’s actual electrical input power compares to a standardized reference fan at the exact same duty point. Get above 1.00, and you’re drawing less power than the baseline. Drop below it, and you’re not.
If your projects touch both North American codes and European markets, there’s a second framework to track too. The EU’s ErP regulation uses a different metric, different terminology, and a different compliance path. Both are covered here. For a broader look at the fundamentals behind fan selection, see our cooling fan fundamentals guide.
Direct Answer
FEI (Fan Energy Index) = FEPref ÷ FEPact at the same duty point. A value above 1.00 means your fan draws less power than the AMCA reference baseline. ASHRAE 90.1 requires FEI ≥ 1.00 for commercial fans ≥ 1 hp. The EU ErP 2024/1834 uses a separate metric (η ≥ η_min). The two frameworks are different and require different compliance documents. EC fans in direct-drive configurations typically reach FEI 1.2 to 1.5.
What Is FEI, and Why It Replaced the Old Fan Efficiency Grade
FEI stands for Fan Energy Index, and it measures electrical power efficiency at a specific duty point, not just peak impeller performance.
Before FEI, there was FEG. Fan Efficiency Grade compared fans based on peak total efficiency of the impeller alone. It didn’t account for the motor, the drive, or the controller. So you could spec a fan with a great FEG number, wire it up with a standard induction motor and a belt drive, and find that the actual system drew significantly more power than expected. FEG told you how good the impeller was. It didn’t tell you how much electricity the whole system would pull from the wall.
That gap is exactly why AMCA developed FEI. The calculation covers the full wire-to-air path: fan aerodynamics, transmission losses, motor efficiency, and controller losses all together. That’s a very different question from “what’s this impeller’s peak efficiency curve?” It’s closer to: “at the duty point your system actually runs at, how does this fan-motor-drive combination compare to a reference baseline?”
Honestly, the industry was overdue for this change. The old FEG system let a lot of marginal selections look better on paper than they performed in the field.
Beyond North America, FEI picked up a second foothold in May 2024. ISO published ISO 12759-6:2024, which defines the FEI calculation method as an international standard. FEI is no longer just a North American code metric. It’s now the basis for a globally consistent way to compare fan system electrical performance at a duty point, which means European and Asian buyers have good reason to understand it even before their local regulations require it.
How FEI Is Calculated: What “Wire-to-Air” Actually Means
FEI equals the reference fan electrical power divided by the actual fan electrical power, measured at the same duty point.
FEI formula
FEI = FEPref ÷ FEPact
Both values calculated at the same airflow, fan pressure, and air density. FEPref = standardized AMCA 208-18 reference baseline. FEPact = real measured electrical input of the fan under test.
FEI = 1.10 → fan uses ~10% less power than reference. FEI = 0.90 → fan uses ~11% more. FEI = 1.00 is the baseline, not a target worth celebrating.
Here’s what “wire-to-air” means in practice. Think of it as measuring everything between the wall socket and the air leaving the fan: how efficiently the blades move air, how much energy the motor wastes as heat, what the drive or belt system loses in friction, and whether a controller adds or reduces losses. A fan tested only at the impeller doesn’t show any of that. FEI forces the whole chain to be accounted for at once.
The pressure basis matters too. FEI can be calculated on either a static pressure basis or a total pressure basis, and which one applies depends on the fan type, not the buyer’s preference. Per AMCA 214-21, centrifugal housed fans use total pressure FEI. Axial panel fans use static pressure FEI. A supplier who gives you a single FEI number without stating the pressure basis is giving you an incomplete figure. That’s worth knowing before you sign off on a submittal.
ASHRAE 90.1 and IECC: What the Code Actually Requires
ASHRAE 90.1 has used FEI as its fan efficiency compliance metric since the 2019 edition, and the 2021 IECC replaced FEG with FEI across the broader building code ecosystem.
The threshold is FEI ≥ 1.00 at the highest design airflow point, for fans with motors of 1 hp or more in commercial building applications, per ASHRAE 90.1-2022 Section 6.5.3.1.3. There is one exception: fans in variable air volume systems meeting the conditions in Section 6.5.3.2.1 can qualify at FEI ≥ 0.95. Fan arrays have their own calculation path under AMCA 208 Annex C, and those results must appear in the project’s construction documents so the authority having jurisdiction can verify them.
Federal weight came in 2023. The test procedure for commercial and industrial fans and blowers, referencing ANSI/AMCA 214-21, took effect on October 30, 2023, per 10 CFR Part 431 Subpart J. FEI is now both a building code metric and a federal regulatory metric in the US.
The March 2026 state alignment deadline has already passed. As of March 6, 2026, US states with federally funded commercial construction were expected to have adopted building energy codes aligned with ASHRAE 90.1, including the FEI provisions. States that have not yet aligned face increasing pressure to update, which may affect active projects in those jurisdictions. Section references per ASHRAE 90.1-2022 as published; verify against the edition adopted in your jurisdiction.
To put a number on what this means: say you’re replacing 40 supply fans in a commercial office retrofit in Houston, each rated at 11 kW at the design duty point. If the replacement fans come in at FEI 0.92 instead of 1.05, that’s roughly a 12% difference in electrical input at that duty point. Running 6,000 hours a year, the gap adds up to around 316,800 kWh annually across the array. At a typical US commercial rate of $0.12 per kWh, that’s about $38,000 per year in avoidable energy cost, from one spec decision. This is a hypothetical calculation based on the FEI formula, not a measured project result, but the arithmetic is real.
In our view, the 2029 timeline is the one worth watching. DOE is expected to finalize a rule making FEI a mandatory product-level metric for general fans and blowers. If that rule is finalized, compliance would shift from building codes to the products themselves. Non-compliant fans may not be available to source regardless of application type. If you’re specifying fans today for equipment with a 10-year service life, that shift is worth building into your procurement logic now.
European ErP 2026: A Different Framework, the Same Goal
EU Regulation 2024/1834 replaces the old fan ecodesign regulation 327/2011 and has applied to standalone fans between 125 W and 500 kW since July 24, 2026.
The European framework does not use FEI. That point causes more confusion in procurement than almost any other procurement detail we see. The old regulation 327/2011 used a metric called FMEG, which stood for Fan Motor Efficiency Grade. The current regulation 2024/1834 moved to a different approach: fan efficiency η compared against a minimum efficiency formula η_min, where the threshold depends on fan type, measurement category, and electrical input power at the best efficiency point. The efficiency grade N appears in that formula.
Here’s why the naming confusion happens all the time. In North America, the old metric was called FEG, which got replaced by FEI. In Europe, the old metric was called FMEG, which got replaced by an η_min efficiency limit and classification system. Two different regions, two different acronyms, both recently updated, both replacing something older. In supplier conversations, “FEG” gets used loosely to mean different things depending on whether the person is thinking about US codes or EU ecodesign. Worth checking which one they mean before the conversation goes too far.
The practical compliance path for European market entry is: CE marking plus a Declaration of Conformity from the manufacturer, issued against the requirements of 2024/1834. From July 2027, fans integrated into HVAC or refrigeration equipment face the same requirements.
Two other obligations from 2024/1834 are worth flagging to your procurement team. Manufacturers must make product information available on a free-access website for at least 20 years. Spare parts must remain available for at least 10 years after the last unit is placed on the market. These aren’t efficiency metrics, but they affect how you write supplier contracts and manage long-term serviceability.
Who Holds the Compliance Obligation, the Fan Supplier or the Equipment OEM?
The regulation attaches to whoever places the fan on the EU market. Buy a standalone fan and install it as-is, and the fan manufacturer or the EU importer holds that obligation and issues the DoC. Build that same fan into an air handling unit, chiller, or refrigeration pack and sell the finished machine under your own name, and you have placed a new product on the market. Your supplier’s DoC covers the fan they sold you. It does not cover the unit you sold.
That distinction gets missed more often than it should. An OEM sees a CE-marked fan arrive with paperwork and treats the finished equipment as covered. It isn’t. The fan’s documentation is an input to your technical file, not a replacement for it. And from July 24, 2027, when the requirements extend to fans integrated into HVAC and refrigeration equipment, you will also need to show that the embedded fan itself meets the threshold, which means holding the fan’s efficiency data in a form you can carry into your own file rather than a certificate sitting in a folder.
| Your situation | Who places it on the market | What you need on file |
|---|---|---|
| Fan bought and installed as-is | Fan manufacturer, or the EU importer if the maker is outside the EU | Supplier DoC referencing EU 2024/1834, not 327/2011 |
| Fan integrated into an AHU, chiller, or refrigeration unit sold under your brand | You, as the equipment manufacturer | Your own technical file for the finished unit, with the fan’s efficiency data carried into it |
| Fan sourced from outside the EU with no EU-established manufacturer | The importer | Complete technical documentation obtained from the supplier before shipment, held for the required retention period |
Source: Proventofan reading of EU Regulation 2024/1834 together with general EU product-law practice. This is not a clause-by-clause legal citation. Confirm your own configuration against the regulation text.
The practical consequence shows up at RFQ stage. A DoC on its own is a statement, not data. What carries into an OEM technical file is the underlying set: fan type, measurement category, efficiency grade N, efficiency at the best efficiency point, electrical input power at BEP, and the URL of the free-access product information page the manufacturer is required to maintain. Ask for those fields explicitly, because a supplier who can only send a certificate cannot support your own declaration later.
In July 2024, a Polish buyer finished confirming a five-model order with us, one φ133 centrifugal unit plus four metal-blade axial fans, then asked a single administrative question: who sends the CE declarations and the invoices, and when. We sent the commercial invoice and the CE documentation together the next day. The detail worth borrowing is what happened inside that file. Because the five models spanned different frame sizes and constructions, the declared standards were not identical across them, so the CE documentation had to be assembled per model rather than issued as one blanket document. If you are the party placing finished equipment on the EU market, that per-model granularity is what your own technical file has to reproduce.
Important Note
The split above describes the common commercial cases, not every configuration. Where a fan is supplied without its final motor or drive, the party completing the assembly is generally the one able to declare the finished fan system, because the regulation evaluates impeller, motor and drive together rather than the motor alone. Confirm your specific case against the regulation text or with your conformity assessment advisor before relying on it.
Proventofan’s EC centrifugal fans (FC3E series) and EC axial fans (EC series) carry CE certification. DoC documentation is available on request. As noted in the checklist below, confirm which regulation version the DoC references before relying on it for 2024/1834 compliance.
FEI vs ErP at a Glance: Two Regions, One Procurement Checklist
If you’re sourcing fans for both US and European projects, this table is the fastest way to check you’re asking for the right documents from each supplier.
| Dimension | FEI (USA) | ErP / η_min (EU) |
|---|---|---|
| Regulation | ASHRAE 90.1-2022 / IECC 2021 | EU Regulation 2024/1834 |
| Metric name | FEI (Fan Energy Index) | η_min efficiency limit + classification (old reg: FMEG) |
| Test standard | AMCA 208-18 / AMCA 214-21 | EN ISO 5801 / EU 2024/1834 Annex II |
| Minimum requirement | FEI ≥ 1.00 (fans ≥ 1 hp) | η ≥ η_min per fan type and power range |
| Scope | Commercial building HVAC fans | 125 W to 500 kW industrial/HVAC fans |
| Compliance path | AMCA certified test data (third-party verifiable) | Manufacturer DoC + CE marking |
| In force | Active (ASHRAE 2019 / IECC 2021) | July 24, 2026 (standalone fans) |
| Buyer verification | Request AMCA 208/214 FEI test report | Check CE marking and DoC document |
Source: public standards and regulations, ANSI/AMCA 208-18, ANSI/AMCA 214-21, ASHRAE 90.1-2022, and EU Regulation 2024/1834.
On the EU side: Proventofan EC fans can supply CE DoC documentation. For the US FEI column, a third-party AMCA FEI certified test report needs to come from a supplier who has completed the AMCA Certified Ratings Program. Those are different documents and different processes.
Good news: a well-specified EC fan can satisfy both frameworks. The underlying driver is the same in both cases: a fan-motor-controller combination that converts electrical input to useful airflow with minimal losses. But the two frameworks measure that performance differently, use different formulas, and require different compliance documents. High FEI does not automatically imply EU η compliance, and vice versa. You don’t need two different products. You do need the right compliance paperwork for each market, verified separately.
Where EC Fans Stand on the FEI Scale
EC fans generally outperform AC induction motor fans on FEI, and the reason is structural, not just a marketing claim.
The technical explanation comes back to wire-to-air. An EC fan, or electronically commutated fan, integrates the drive electronics directly into the motor. There’s no external variable frequency drive adding losses, no belt transmission, no coupling inefficiency between motor and impeller. The power path from input to airflow is shorter, and each component in that path runs at higher efficiency than an equivalent AC induction setup with a separate motor, belt drive, and controller. Per AMCA’s technical guidance on FEI, that’s exactly what the metric rewards: a better outcome across the full wire-to-air chain at the real duty point.
Industry figures from multiple suppliers suggest EC fans generally fall in the FEI 1.2 to 1.5 range at rated conditions, well above the ASHRAE 90.1 floor of 1.00. AC induction fans with standard motors typically run in the 0.85 to 1.05 range depending on motor efficiency class and drive type. These are illustrative ranges based on market observations and product-level data from multiple suppliers, not AMCA-published benchmarks. Treat them as directional, not as performance guarantees for any specific product or duty point.
Consider a scenario where you’re replacing an AC induction fan running at FEI 0.91 with a direct-drive EC unit at FEI 1.28 on the same duty point: 6,500 m³/h at 300 Pa static. The AC unit draws about 1.8 kW there, which is a realistic wire-to-air figure for a belt-driven induction setup running at roughly 30% overall efficiency. The FEI ratio puts the EC unit about 29% lower, near 1.28 kW. At 8,000 annual operating hours, that difference is roughly 4,200 kWh saved per fan per year. On a 20-fan installation, that’s about 84,000 kWh, or around €10,000 at a European industrial electricity rate of €0.12/kWh. This is an illustrative calculation based on the FEI formula; actual savings depend on site-specific duty points and verified product data.
But here’s the thing. Swapping an AC fan for an EC fan doesn’t automatically produce a high FEI. FEI is calculated at a specific duty point, and if the replacement fan isn’t selected to operate efficiently at that operating condition, the improvement may be smaller than expected. The wire-to-air story only holds if the fan, motor, and controller are all matched to where the system actually runs.
Proventofan’s FC3E series EC centrifugal fans (133 to 560 mm, 230 VAC or 380 VAC, IP44, PWM / 0-10 V speed control, with Modbus RS-485 on 220 mm and above) integrate the drive and controller into the motor unit. No external VFD is needed. That structural design is the same reason EC fans score well on FEI as a category, regardless of which brand you’re evaluating.
If you want to compare two products on FEI, ask both suppliers for the FEI value at the same duty point: same airflow, same static pressure, same air density. Any other comparison isn’t valid. For a more detailed look at the technical differences between EC and AC motor technology, see our EC fan vs AC fan comparison, or start with the basics at what is an EC fan.
How to Read FEI Data on a Spec Sheet: A Buyer’s Checklist
FEI appears on a spec sheet as a single number, but that number is only meaningful in context: what duty point it was calculated at, what pressure basis was used, and whether the value was independently verified.
Start with the duty point. FEI is calculated at one specific operating condition: the highest design airflow point. It doesn’t tell you what happens at part load, reduced speed, or any other condition. If your system spends most of its life at partial load, a high FEI at max airflow is useful but not the whole picture. That’s part of why EU ErP 2024/1834 added partial load efficiency curve requirements effective from July 2027. FEI, as currently used, measures one point on the performance curve.
Next, check the pressure basis and test configuration. Per AMCA 214-21, FEI is calculated on either a static or total pressure basis, and which applies depends on fan type, not buyer preference. The test configuration also matters: AMCA 214 defines five categories, each reflecting a different real-world installation boundary.
| AMCA 214 Configuration | Description | Typical fan types |
|---|---|---|
| A | Free inlet / free outlet with baffle | Axial panel fans, wall fans |
| B | Free inlet / ducted outlet | Centrifugal fans in plenum |
| C | Ducted inlet / free outlet | Some inline fans |
| D | Ducted inlet / ducted outlet | Centrifugal housed, axial duct fans |
| E | Free inlet / free outlet without baffle | Jet fans, open-plenum installations |
Source: test configurations as defined in ANSI/AMCA 214-21. The typical fan types column is our reading of how each configuration maps to common installations, not a list published in the standard.
A supplier who only writes “FEI = 1.08” without noting the test configuration and pressure basis is giving you an incomplete figure. The same fan can produce different FEI values under different configurations, so comparing two products requires confirming both used the same setup.
“The number we see get misread most often is FEI at peak fan efficiency versus FEI at the highest design airflow. Those are two different operating points, and only one of them is what ASHRAE 90.1 actually checks.”
Krystal K, Technical Marketing Engineer, Proventofan
In our experience, the most useful question you can ask a supplier is: “Can you confirm the FEI at our exact duty point, with the AMCA 214 test configuration and pressure basis noted?” That question separates suppliers with real test data from those quoting a catalog number that may not apply to your operating condition.
For the EU side, ask for the CE DoC and check which regulation version it references. Documents issued before 2024 may reference the old 327/2011. For projects going live after July 24, 2026, you want confirmation against 2024/1834.
Before issuing your next RFQ, run through this checklist:
- FEI value confirmed at your actual duty point (airflow, fan pressure, air density stated)
- Pressure basis noted: static or total
- AMCA 214 test configuration noted: A, B, C, D, or E
- AMCA Certified Ratings Program status confirmed, or equivalent third-party verification
- EU market: CE marking confirmed, DoC file referencing EU 2024/1834 available
- Proventofan EC centrifugal or EC axial fans can supply CE DoC on request
If your RFQ template doesn’t yet include FEI language, the block below is ready to copy directly into your specification document.
FEI Specification Language for RFQ
Fan Performance Requirement
- Airflow: ___ m3/h
- Static pressure: ___ Pa
- Air density: 1.2 kg/m3 (or state site condition)
FEI Compliance
- FEI >= 1.05 at above duty point
(ASHRAE 90.1 minimum: 1.00; specify higher if lifecycle cost analysis warrants)
- Pressure basis: static / total (select applicable per fan type)
- Test standard: ANSI/AMCA 214-21
- Test configuration: A / B / C / D / E (select applicable)
Required Documentation - US Projects
- FEI value confirmed at highest design airflow (not peak fan efficiency point)
- AMCA Certified Ratings Program status, or equivalent third-party test report
Required Documentation - EU Projects
- CE marking confirmed
- Declaration of Conformity referencing EU Regulation 2024/1834
- Efficiency grade N and eta at BEP stated
Supplier note: FEI must be calculated at the highest design airflow point
per ANSI/AMCA 208-18, not at the point of peak fan efficiency.What Changes for Buyers After 2026, and What to Do Now
The regulatory picture for fan efficiency has moved from optional best practice to hard legal requirement in about seven years, and the process isn’t finished.
The key dates are stacking up. EU Regulation 2024/1834 has applied to standalone fans since July 24, 2026. Fans integrated into HVAC and refrigeration equipment follow from July 24, 2027. In the US, the state-level ASHRAE 90.1 alignment deadline passed in March 2026. On the federal side, DOE is expected to finalize a rule making FEI a product-level requirement for general fans and blowers before 2029. If that rule is finalized, compliance shifts from building codes to the products themselves, and non-compliant fans may not be available to source regardless of application type.
The smart response isn’t panic. Most well-specified EC fans already perform at FEI levels well above 1.00. The gap is usually documentation, not product performance. A lot of procurement still relies on “this supplier says it’s efficient” rather than “this supplier can show me the FEI number at my duty point with a traceable test basis.” Closing that gap now puts you ahead of the 2029 timeline rather than scrambling when it arrives.
Three things worth doing now. First, update your RFQ templates to require FEI at the specified duty point, with pressure basis and AMCA 214 configuration stated. Second, if you supply into European markets, confirm your manufacturer’s DoC references EU 2024/1834, not only the old 327/2011. Third, if you have existing installations sized under pre-FEI standards, flag them for review before any retrofit or replacement cycle, particularly if the 2029 federal rule affects your product categories.
Proventofan’s EC centrifugal fans (FC3E series) and EC axial fans (EC series) carry CE certification. UKCA documentation for UK market applications is available on request. For DoC version confirmation against EU 2024/1834, contact the product team directly. See our EC fan solutions page for application-specific guidance.
The one action worth taking today: add “FEI at design duty point per AMCA 208/214, test configuration stated” to your standard specification language. That single line separates compliant bids from non-compliant ones before evaluation begins.
Frequently Asked Questions
Is FEI the same as fan efficiency percentage?
No. Fan efficiency percentage measures how much of the input power is converted to useful airflow at a given operating point. FEI is a ratio comparing your fan’s actual electrical input power against a standardized reference fan at the same duty point. A fan with 75% aerodynamic efficiency at its best point could still have an FEI below 1.00 if the motor and drive are inefficient. FEI captures the full wire-to-air picture; a single efficiency percentage usually doesn’t.
What is a good FEI value?
ASHRAE 90.1 sets the compliance floor at FEI ≥ 1.00 for most commercial building fans (≥ 1 hp). A value of 1.10 means the fan uses about 10% less electrical input than the reference baseline at that duty point. EC fans in direct-drive configurations often reach 1.2 to 1.5, though those figures vary by product, duty point, and configuration. There’s no universal “good” number beyond meeting the code minimum and exceeding it by a margin that makes sense for lifecycle cost.
Does FEI include the motor and drive?
Yes. That’s the defining feature of FEI compared to older fan metrics. The calculation covers the full wire-to-air path: fan aerodynamics, transmission efficiency, motor efficiency, and controller losses. This is why EC fans, which integrate the drive and controller into the motor unit, tend to score higher on FEI than equivalent AC induction configurations with separate external drives.
Does Europe use FEI or FMEG?
Neither, exactly. The old EU regulation 327/2011 used FMEG (Fan Motor Efficiency Grade). The current regulation 2024/1834, effective July 24, 2026, replaced that with fan efficiency η compared against a minimum threshold η_min, with efficiency grade N as part of the calculation. FEI as defined by AMCA 208/214 is not the legal metric in EU ecodesign. But ISO 12759-6:2024, published in May 2024, standardizes the FEI calculation internationally, so the concept is increasingly relevant to European buyers even where local regulations use different language.
Is AMCA 214 the same as AMCA 208?
No. AMCA 208-18 defines the FEI calculation method and the reference fan formula. AMCA 214-21 is the test procedure standard that specifies how to measure and report FEI for commercial and industrial fans, including which test configurations apply, how to determine the pressure basis, and how to set the input power boundary for the calculation. For compliance submittals under ASHRAE 90.1-2022, the project’s adopted edition determines which document path applies.
Who is responsible for ErP compliance when a fan is built into an AHU?
The equipment manufacturer. Selling a finished air handling unit, chiller, or refrigeration pack under your own name places a new product on the EU market, so your supplier’s fan DoC does not carry over to it. The fan’s documentation becomes an input to your own technical file rather than a substitute for it. From July 24, 2027, when the requirements extend to fans integrated into HVAC and refrigeration equipment, you will also need the embedded fan’s efficiency data in a form you can carry into that file.
What documents should I ask a supplier to provide?
For US projects under ASHRAE 90.1: FEI value at the highest design airflow, the duty point conditions used, pressure basis (static or total), AMCA 214 test configuration (A through E), and AMCA Certified Ratings Program status. For EU projects: CE marking, Declaration of Conformity referencing EU 2024/1834, fan type, measurement category, efficiency grade N, and electrical input power at BEP. From July 2027, also request partial load efficiency curves at three or more speed conditions.
Sourcing fans for a US or EU compliance project?
Send the target market and the standard you are being held to (ASHRAE 90.1, EU 2024/1834, or UKCA), the full duty point (airflow, static or total pressure, and air density), voltage and phase, control signal, ambient temperature and IP requirement, any noise limit, annual quantity, and one line on whether the fan installs as-is or gets built into equipment you sell under your own name. That last point decides who issues the declaration, so it changes which documents you need from us. With those inputs, Proventofan can confirm the FEI basis and the DoC version for EC centrifugal and EC axial fans instead of quoting a catalog figure that may not hold at your operating point.
References
- ANSI/AMCA Standard 208-18: Calculation of the Fan Energy Index. amca.org
- ANSI/AMCA Standard 214-21: Test Procedure for Calculating Fan Energy Index. amca.org
- AMCA International: About Fan Energy Index. amca.org
- ASHRAE Standard 90.1-2022. ashrae.org
- EU Regulation 2024/1834 (EUR-Lex). eur-lex.europa.eu
- EU Regulation No 327/2011 (EUR-Lex). eur-lex.europa.eu
- ISO 12759-6:2024, Efficiency Classification for Fans, Part 6. iso.org
- Eurovent: FAQ on ErP 2026 for Fans (2025-09). eurovent.eu
- Greenheck: Understanding the Fan Energy Index (FA135, 2025). greenheck.com
- ebm-papst: ErP 2026 Stricter Efficiency Requirements. ebmpapst.com
Disclaimer
The FEI and ErP compliance information in this article is based on publicly available standards and regulations as of the publication date and is provided for general guidance only. Regulatory requirements may change over time. Specific compliance obligations depend on the applicable edition of the standard adopted in your jurisdiction. Fan selection and compliance certification should be confirmed against actual application conditions and current manufacturer product data.
