New BH3 AIR welding helmet, which can be combined with both Flexi and Standard face seal as well as with most Clean-air power unit sets, has successfully passed all tests according to the EN 12941 standard and gained a certificate for the highest possible protection level TH3.
The European standard defines three basic classes of protection and performance (mainly inward leakage) of which the TH1 being the lowest still acceptable and the TH3 being the highest possible class:
- TH1 - 10% (mainly inward leakage)
- TH2 - 2% (mainly inward leakage)
- TH3 - 0, 2% (mainly inward leakage)