Structural Engineering / Housing Technology | A
Reliability – Responsibility – Sustainability
For over 30 years, we have manufactured fire protection boards from materials which pose no harm to health.

Reliability – Responsibility – Sustainability
For over 30 years, we have manufactured fire protection boards from materials which pose no harm to health.
THERMAX® is always the first choice when it comes to using process-friendly and sustainable fire protection solutions in housing technology and structural engineering.
Constructions with THERMAX® SL fire protection boards under ETA - 11/0083 SINTEF (06/2018) for:
➔ Ventilation ducts – self supporting ➔ EI 60, EI 90, EI 120
➔ Ventilation duct with internal sheet steel duct ➔ EI 90
➔ Smoke extraction duct ➔ EI 60, EI 90, EI 120
➔ Installation channels and shafts ➔ EI 60, EI 90, EI 120
THERMAX® SL: Ventilation ducts – self supporting
Designation | Classification | Material thickness | Duct dimensions | Operating pressure |
---|---|---|---|---|
L2060 | EI 60 (ve ho o ↔ i) S | 1 x 35 mm | ≤ 1250 x 1000 mm (WxH) cross-section | ± 500 Pa |
L2090 | EI 90 (ve ho o ↔ i) S | 1 x 45 mm | ≤ 1250 x 1000 mm (WxH) cross-section | ± 500 Pa |
L2120 | EI 120 (ve ho o ↔ i) S | 1 x 55 mm | ≤ 1250 x 1000 mm (WxH) cross-section | ± 500 Pa |
Single-skinned, 4-sided ventilation duct with a fire resistance time of 60, 90 or 120 minutes.
Larger duct dimensions are available.
Tested under EN 1366-1

THERMAX® SL: Ventilation duct with internal sheet steel duct
Designation | Classification | Material thickness | Duct dimensions | Operating pressure |
---|---|---|---|---|
L1090 | EI 90 (ve ho o ↔ i) S | 1 x 45 mm | ≤ 1250 x 1000 mm (WxH) steel duct, cross-section | ± 500 Pa |
Single-skinned, 4-sided ventilation duct as a fire protection coating for ventilation ducts made of steel sheets, for a fire resistance time of 90 minutes.
Tested under EN 1366-1

THERMAX® SL: Smoke extraction duct
Designation | Classification | Material thickness | Duct dimensions | Operating pressure |
---|---|---|---|---|
L3060 | EI 60 (ve-ho) 500 multi | 1 x 35 mm | ≤ 1250 x 1000 mm (WxH) cross-section | ± 500 Pa |
L3090 | EI 90 (ve-ho) S 500 multi | 1 x 45 mm | ≤ 1250 x 1000 mm (WxH) cross-section | -1500/+500 Pa |
L3120 | EI 120 (ve-ho) S 1500 multi | 1 x 55 mm | ≤ 1250 x 1000 mm (WxH) cross-section | -1500/+500 Pa |
Ventilation ducts, independent single-skinned, 4-sided ventilation duct with a fire resistance time of 60, 90 or 120 minutes.
Larger duct dimensions are available.
Tested under EN 1366-8

THERMAX® SL: Installation channels and shafts
Designation | Classification | Material thickness | Duct dimensions | - |
---|---|---|---|---|
I1060 | EI 60 (ve ho o ↔ i) | 1 x 35 mm | 200 x 200 mm – 1250 x 1000 mm | - |
I1090 | EI 90 (ve ho o ↔ i) | 1 x 45 mm | 200 x 200 mm – 1250 x 1000 mm | - |
I1120 | EI 120 (ve ho o ↔ i) | 1 x 55 mm | 200 x 200 mm – 1250 x 1000 mm | - |
Single-skinned, 4-sided installation channels and shafts with a fire resistance time of 60, 90 or 120 minutes. For all standard installations, with the exception of cable routes.
Tested under EN 1366-5
