For some environments constantly moving hoods around large parts may not be physically possible. Miller Electric and others offer respiratory solutions such as Powered Air Purifying Respirators (PAPRs), half masks, and supplied air respirators.
These may be important in welding stainless steel and some other materials that may produce hexavalent chromium, also called Cr(VI), which creates a highly toxic fume.
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PAPRs can be integrated directly into welding helmets for continuous supply.
Half masks generally fit under most welding helmets and hardhats.
Supplied air respirators provide a very safe option that provides clean air from an outside, uncontaminated source.