The Welding Manufacturer's Association of Australia recommends that the level of welding fume in the welder's breathing zone should be less than 5mg per cubic metre.
90% filtration efficiency to 0.5 micron size, combined with effective ventilation, will result in concentrations well below 5mg per cubic metre.
Welding fumes comprise:
Residual dust associated with metal burning and electrode burning, typically in the 0.5 micron to 1.0 micron range.
Oxides in the 0.01 to 1.0 micron range but mainly toward the 1.0 micron end.
The Eaziflo's secret is its all-Australian designed "high efficiency filter system". This means extraction rates as high as 80%.