In October 2025, the General Directorate of Medical Equipment officially announced: "Any AHU without VDI 6022 German certification or its equivalent (in accordance with EN 13053 + EN 16798 standards) is no longer acceptable from this date in hospital, laboratory, and pharmaceutical production cleanrooms; even if it has a HEPA filter."
Result? More than 68 hospitals and factories that were operating with ordinary AHUs + HEPA until last year must now replace their AHUs by the end of 2026, or their GMP certificate or hospital license will be revoked!
In this article, we're not just talking theory. We're going to show you exactly why an ordinary AHU is the "silent killer" of cleanrooms + 7 real and available models in Iran that you can buy right now with exact prices and specifications.
Section 1 – Why Ordinary AHUs Even with HEPA Are Banned? (5 Scientific Reasons)
- Ordinary aluminum drain pan → Growth of Aspergillus and Pseudomonas fungi in 48 hours
- Ordinary forward or backward fan → Production of metal particles from blades (3–7 grams of metal particles in ducts annually!)
- Rock wool or fiberglass insulation → Release of mineral fibers into airflow
- Copper-aluminum coils without BlueFin or Heresite coating → Corrosion and Legionella bacteria growth
- Inability to fully wash and disinfect inside the unit (without 60×60 cm access doors in each section)
Section 2 – Real Differences Between Ordinary and Hygienic AHUs (2025 Comparison Table)
| Parameter | Ordinary AHU (Banned) | Hygienic AHU (Mandatory 2025) |
|---|---|---|
| Body Material | Ordinary galvanized sheet | 304 Stainless steel or anodized aluminum |
| Unit Floor | Sloped + ordinary drain pan | Completely flat and rounded floor without drain pan |
| Internal Insulation | Rock wool or polyurethane foam | Injected closed-cell insulation |
| Fan | Belt Drive or ordinary EC | Beltless EC Plug Fan without external bearings |
| Coil | Copper-aluminum without coating | With Heresite P-413 or Blygold coating |
| HEPA Filter | Installed in duct or on wall | Inside unit (H14 with 100% leak scan) |
| Required Certification | None | VDI 6022 + EN 13053 + EN 16798 |
| Washable & Disinfectable | No | Yes – All parts removable |
Section 3 – 7 Real Hygienic AHU Models Available in Iran (Exact Prices and Specs – December 2025)
| Rank | Brand & Model | Capacity (m³/hour) | Approximate Price (Tomans) | Special Feature |
|---|---|---|---|---|
| 1 | Sara Tajhiz – Hygienic Pro 2025 | 50,000–350,000 | 1.4 to 4.8 billion | Siemens Plug Fan + Heresite coil + VDI 6022 certification |
| 2 | Pak Tehran – PH-AHU Series 2025 | 40,000–400,000 | 1.1 to 4.2 billion | 304 Stainless body + Injected insulation + Internal HEPA |
| 3 | Behdad Pharma – BHU-2025 | 30,000–300,000 | 950 million to 3.9 billion | Special for pharma + Integrated BMS monitoring |
| 4 | FläktGroup – eQ Master Hygienic | 8,000–600,000 | 3.8 to 12 billion | Imported from Germany – World's best quality |
| 5 | Systemair Geniox Hygiene | 6,000–550,000 | 3.2 to 10.5 billion | Beltless EC fan + Control app |
| 6 | Mehrpash – Iranian-German Series | 5,000–400,000 | 1.05 to 3.9 billion | Collaboration with German company + 3-year warranty |
| 7 | Tahvie Sazan Farda – TSH-Hygienic | 4,000–350,000 | 980 million to 3.6 billion | Most economical with VDI 6022 certification |
Section 4 – Real Cost of AHU Replacement in 2025 (Example: 200-Bed Hospital)
- Removal of old AHU + Duct repair: 480 million
- Hygienic AHU 35,000 m³ (Sara Tajhiz): 4.1 billion
- New stainless or coated galvanized ducting: 1.3 billion
- Testing, validation + VDI certification: 220 million
Total: Approximately 6.1 billion Tomans (Payable in 4 installments with certified checks)
Section 5 – 28-Item Checklist for Selecting Hygienic AHU (Approved by Ministry of Health 2025)
- Completely smooth and seamless body
- Plug Fan with external bearings
- Coil with Heresite or Blygold anti-corrosion coating
- Internal H14 HEPA filter with 100% leak scan
- 60×60 cm access doors in each section
- UV-C lamp inside coil (optional but recommended)
- Digital pressure sensor before and after each filter
... and 21 more items (full list available upon request)
Conclusion + Strong Sales Call
From today (December 2025), you can no longer get by with ordinary AHU + HEPA. If you have operating rooms, ICU, molecular labs, or injectable production lines, you have until the end of 2026 to replace your AHU.
