AirSelect3D Blog
Regulation (EU) 2024/1834: Fan Ecodesign Rules for AHUs, 2026–2027
Commission Regulation (EU) 2024/1834, published 3 July 2024, replaces the fifteen-year-old Regulation (EU) No 327/2011 as the ecodesign rulebook for fans. For anyone specifying or selling air handling units, the dates that matter are already on the calendar: 24 July 2026 for standalone fans, 24 July 2027 for fans integrated into other products such as AHUs, heat pumps and refrigeration units — provided the first unit of that product was placed on the market before 24 July 2026. Here is what actually changes and what to check before then.
What 2024/1834 covers
The regulation applies to fans driven by motors with an electric input power between 125 W and 500 kW at their best efficiency point (BEP), including fans embedded inside larger products. That scope is the first material change: 327/2011 exempted roughly half the fan market on technicality grounds (jet fans, certain low-power or specialist types). 2024/1834 closes most of those gaps, so components that shipped compliant-by-exemption under the old text may need a fresh efficiency check under the new one.
The efficiency floor moves
327/2011 used Fan Motor Efficiency Grade (FMEG) targets that most catalogue fans cleared years ago. 2024/1834 sets new Fan Efficiency Grade (FEG) minimums, measured as static or total efficiency at BEP depending on fan type:
| Fan type | Minimum efficiency (2026) | Metric |
|---|---|---|
| Axial fans | ≥ 50% | Static efficiency at BEP |
| Radial, backward-curved blades | ≥ 64% | Total efficiency at BEP |
| Crossflow fans | ≥ 21% | Total efficiency at BEP |
Two things sit alongside the efficiency numbers and change how a spec sheet gets read:
- Part-load and variable-speed performance is now a declared requirement, not a footnote. A fan that hits its BEP number but degrades badly at 50% duty — the operating point most AHUs actually run at for most of the year — is where the new text bites hardest.
- Repairability clauses require spare-part availability and disassembly information, aimed at plug fans and EC-motor assemblies that were previously sold as sealed units.
Why the 2026/2027 split matters for AHU quotes
If you sell or specify complete units rather than bare fans, the 24 July 2027 date is the one to track, not 2026 — but only if the AHU model was already on the market before mid-2026. A new product launched after that date has no grace period and must comply from day one. In practice this means:
- Fans selected today for a 2026-2027 delivery window should already meet the new FEG minimums. Building a quote around a fan that only clears the old FMEG bar creates a compliance cliff mid-project.
- 327/2011's Annexes I-III stay legally referenced until 2037, but only for spare parts and for products already on the market before the cutoff — not a basis for new AHU designs.
- SFP and FEG are related but not the same lever. A fan can meet the new FEG floor and still push SFP_int over an ErP or Eurovent threshold if the casing forces a bad operating point. Efficiency grade is a property of the fan; SFP is a property of the whole air path.
What to check on a fan curve before 2026
- Does the declared efficiency use the same metric (static vs total) that the regulation requires for that fan type — axial and centrifugal are graded differently, and datasheets sometimes report the flattering one.
- Is the part-load curve published, or only the BEP point? A fan with no declared part-load behaviour is a red flag for a 2026+ RFP.
- For EC plug-fan walls, does the manufacturer publish repairability/spare-parts documentation, or is the assembly still marketed as sealed?
Where the tooling matters
AirSelect3D pulls fan performance directly from manufacturer engines — Ziehl-Abegg and eBM Papst DLLs, not curve-fit approximations — so the same selection that computes SFP_int also carries the fan's real efficiency-grade data through to the dossier, engine-version stamped. When a fan swap changes the operating point, both numbers recalculate on the results rail immediately, before the design ever gets exported.
See fan efficiency and SFP recalculate live in the 3D designer →
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AirSelect3D runs certified manufacturer engines (Camfil, Ziehl-Abegg, eBM Papst, Friterm, Hoval) and ships an ErP-compliant Eurovent dossier with every selection.
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