Correct you do not unscrew the HRV in the sea dweller...
I'm at work and busy, perhaps I loaded the wrong patent, I'll check when I have time. But Bandit, I can tell you I have over 11,000 hours bottom time, have been in deco chambers and studied dive physics and chemical engineering...
So don't get an attitude with me unless you're Comex, DSI or Arthur Levy
