SEC 01 // SYSTEM RECORD
CleanSpace WORK / CST PRO (hose-free PAPR)
CleanSpace's distinct battery-on-mask architecture: no belt, no hose — the blower sits on the half-mask itself (<400 g) with AirSensit adaptive airflow. Relevant to welders for grinding/fabrication particulate protection, but it is NOT a helmet PAPR. CRITICAL standards distinction: as a tight-fitting half-mask system, the CST PRO is certified under EN 12942 TM3 (tight-fitting masks) — not EN 12941, which covers loose-fitting hoods/helmets like Adflo or EPR-X1. The two standards have different classes (TM vs TH), different fit requirements (tight-fitting masks need fit testing), and different protection assumptions. Never treat them as interchangeable.
Approval class
| Standard | Class | Region |
|---|---|---|
| EN 12942:1998+A1:2002+A2:2008 | TM3 P R SL (tight-fitting; CE and UKCA) | UK/EU |
| NIOSH 42 CFR 84 | TC-21C-1269 Class HE (with Half Mask + HI CAPACITY filter) | US |
| AS/NZS 1716:2012 | PAPR-P3 (P2 with Half Mask) | AU/NZ |
Generations & part-number caution: Filters are proprietary CleanSpace particulate (P3/HE) units. Because the system is tight-fitting, workplace use requires face-fit testing — a materially different compliance path from loose-fitting helmet PAPRs.
Compatible headtops
- Half-mask with head harness (tight-fitting — requires fit testing)
Parts in our database
| Part number | Part | Category | Compatibility status |
|---|---|---|---|
CST1004 | CST Particulate High Capacity TM3 P3 Filter (3 Pack) | filter | T2 Manufacturer-listed part |
CST1021 | CST Head Harness (spare/replacement) | harness | T2 Manufacturer-listed part |
CST1034 | CST Half Mask – Small (inc. Non-Fabric Head Harness) | headtop | T2 Manufacturer-listed part |
CST1036 | CST Half Mask – Large (inc. Non-Fabric Head Harness) | headtop | T2 Manufacturer-listed part |
CST1035 | CST Half Mask – Medium (inc. Non-Fabric Head Harness) | headtop | T2 Manufacturer-listed part |
Record sources
Evidence — dated sources
- [01] cleanspacetechnology.com manufacturer page Official CST PRO page: EN 12942:1998+A1:2002+A2:2008 TM3 P R SL (CE/UKCA), NIOSH TC-21C-1269 Class HE (with Half Mask + HI CAPACITY filter), AS/NZS 1716:2012 PAPR-P3. Consumables confirmed: CST1004 Particulate High Capacity TM3 P3 filter (3-pack), CST1035 Half Mask with head harness (M). A Declaration of Conformity PDF is published on the same site. 2026-07-04
- [02] cleanspacetechnology.com declaration of conformity Official CleanSpace CST Declaration of Conformity. This record exists partly as a documented correction — the original research described CleanSpace under EN 12941 as a blanket claim, which is wrong for the tight-fitting systems. 2026-07-04