harrymini wrote: ↑Wed Jan 13, 2021 3:17 pm
They aren't air fed like some blasting and spraying masks, they have a unit that attaches to a belt that sucks filtered air in, powered by a rechargeable battery.
If anyone is struggling with the decision of welding masks just for for an Esab sentinel either air fed or not, they are great.
I had a Speedglas /3M one years ago (it was new, very little used) it was terrible it accentuated the fan noise through the delivery hose it was like what they call white noise! l sold the breathing unit and took the snorkel off the helmet an sold that, still got the helmet.