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AHU Technical Data Sheet — What Consultants Check (Free PDF Example)
A complete AHU technical data sheet answers every question a bureau d'études will ask before they ask it: regulation status (ErP 1253/2014), energy class with its inputs visible (ECP-05-2026, fs-Pref both seasons), casing classes (EN 1886), octave-band acoustics, per-component selections with data provenance, and the psychrometric states behind every capacity figure. Miss one of those and the submittal comes back with questions — miss two and it comes back rejected.
Download the full 15-page TDS example (PDF) — a 5 000 m³/h double-deck plate-HRS unit, ErP-compliant, ECP-05-2026 Class A+ both seasons, generated end-to-end in AirSelect3D. Every number discussed below is on it.
Why data sheets get rejected
Consultants rarely reject a unit because it's badly sized. They reject the dossier — because a claimed capacity has no state points behind it, an energy class has no fs-Pref shown, or a single dBA figure stands in for a spectrum. The pattern behind almost every rejection is the same: a result is asserted without the inputs that produced it. The fix is structural, not cosmetic — the data sheet has to carry its own audit trail.
The checklist a bureau d'études actually runs
1. Regulation verdict, stated on the document
ErP (EU) 1253/2014 compliance for an NRVU is a pass/fail gate: heat-recovery thermal efficiency and SFPint limits must both hold. On the example unit the verdict line reads "ErP — COMPLIANT" on every page footer, backed by the numbers that make it true: plate exchanger at 78 % / 78 % (winter/summer, above the 73 % plate minimum) and fan SFPint of 548 and 483 W/(m³/s) — each fan's contribution itemised, not a single unexplained total.
2. Energy class with its inputs visible
An ECP-05-2026 class is only checkable if the sheet shows the fs-Pref for both seasons. The example states Class A+ winter and summer at fs-Pref 0.90 / 0.90 — a unit can pass in January and fail in July, so a single-season class is a red flag, not a shortcut. Total SFP (1031 W/(m³/s)) and per-side SFP classes are printed alongside, so the EN 16798 SFP roll-up can be re-derived line by line.
3. Casing classes per EN 1886
Mechanical strength D2, casing air leakage L2 (evaluated at all four test points — motor / return sides × −400 / +700 Pa), filter bypass F9, thermal transmittance T2, thermal bridging TB2 — plus the per-octave panel transmission loss that feeds the acoustic model. If the acoustic section and the casing section come from different assumptions, a good reviewer will catch it.
4. Acoustics as a spectrum, not a number
Five rows of octave-band data (airborne, plus in-duct at all four apertures), each summed logarithmically into its LwA — the method we walked through in how LwA totals are really summed. The consultant checking against an NR curve needs the 125 Hz column; the example provides it for every path.
5. Component provenance
Every section on the example carries a data_source line — which vendor, which product code, whether the figure came from a catalogue dataset or a live manufacturer calculation. A capacity with no provenance is an assertion; a capacity with the selection code is a verifiable claim.
6. Psychrometric closure
The last page plots every process step on a ψ-h chart with a state-point table: heat-recovery winter/summer on both airstreams, coil entering/leaving conditions with humidity ratios. If the coil section claims 32.66 kW, the chart must show the 25.8 → 14.8 °C step that produces it — on the example, it does.
What this looks like in practice
| Checklist item | Where it lives on the example TDS |
|---|---|
| ErP 1253/2014 verdict | Every page footer + energy data |
| ECP-05-2026 class, fs-Pref W/S | Page 1 verdict banner + general specs |
| EN 1886 casing classes | Dedicated classification section |
| Octave-band sound power | 5 spectra + per-fan inlet/outlet tables |
| Component provenance | data_source line on each section |
| Psychrometric states | ψ-h chart + state-point table |
| Dimensions & transport | Orthographic plans + transport sections |
The audit trail is the product
None of this is decoration. A data sheet that carries its own inputs is one a consultant can approve without a single email — and the 3D model, the plans, the DXF export and the printed specs all derive from the same geometry, so there is no version of the unit that disagrees with another. That is what "audit trail" means in practice: not more pages, but no orphaned numbers.
Get the example TDS (PDF, 15 pages) and compare it against your current submittal template.
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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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