Need respirator recommendations

8 hours max, but if you can smell the paint, or it takes more effort to breath, meaning the filters are getting plugged. The cartridges we used had the HEPA and organic solvent together. The fresh air system is a whole different animal. They use air from the compressors for breathing. It has filters in place to remove oils and moisture. Also a CO2 monitor. You plug in right after the monitor. Basically creating a positive pressure zone that keeps out any harmful fumes, supposedly. I have also seen the smaller battery operated masks that uses the self contained system. I've never used them, but those that dumped the strontium chromate into the batch had them.