§02
MODULE / AIR FILTRATION
Air Filtration — ISO 14644-1 and EN 1822-1:2019 HEPA/ULPA delivery.
Engineered clean-air envelopes for surgical suites, isolation rooms, compounding pharmacies, and ICU isolation bays. Each installation is commissioned against a class declared in the scope document, not estimated post-hoc.
02.1
ISO 14644-1 · EN 1822-1:2019
HEPA-grade recirculation units
H13 / H14 ceiling-mounted and inline housings for operating theatres, transplant units, and negative-pressure isolation. Sealed gasket assemblies, in-situ scan-tested per EN 1822-1:2019 Annex A.
- Typical class
- ISO 5 / ISO 6
- Deployment
- 6–9 weeks
- Validation
- In-situ scan, 100% filter face
02.2
EN 1822-1:2019
ULPA terminal filtration
U15 / U16 terminal stages for pharmaceutical compounding and BMT cleanroom envelopes. Aluminium separators, polyurethane gaskets, scan-certificate per filter.
- Typical class
- ISO 4 / ISO 5
- Deployment
- 8–12 weeks
- Validation
- EN 1822 individual scan
02.3
ISO 14644-4 · NF S90-351
Negative-pressure isolation envelopes
Single-pass cascade pressure architecture for airborne infection isolation. Cascaded magnehelic gauges, sealed-room pressure verification, and 12-Pa differential benchmarked to NF S90-351 zone 4.
- Typical class
- ISO 7 with ≥12 Pa cascade
- Deployment
- 4–7 weeks
- Validation
- NF S90-351 cascade test
02.4
ANONYMIZED SAMPLE READING
Pre / post-commissioning, EU tertiary hospital
Operating-theatre envelope, 11 m × 7 m × 3.2 m clear height. Three-stage filtration retrofit with H14 terminal stage and sealed housing conversion.
| Parameter | Pre-retrofit | Post-retrofit |
| ISO 14644-1 class | ISO 7 | ISO 5 |
| Particulate @ ≥0.5 µm | 352,000 / m³ | 1,890 / m³ |
| Airborne CFU / m³ | 18 | < 1 |
| ACH | 15 | 28 |