Quote: (Originally Posted by wedivebc)
I am not familiar with the units that use KO2 but I doubt the IDA-71 uses it. KO2 actually generates O2 and therefore needs no external gas supply.
The IDA-71, does use potassium superoxide in its original configuration. There are two scrubber canisters on the unit. The first one contains a conventional CO2 removal agent and the second one is filled with KO2.
Once the unit switches to nitrox mode, the KO2 is used to generate O2 in the loop along with the EANx off-board unit once the O2 tank cuts off via a hydrostatic valve. Dave Sutton describes things in his site quite well.