The 2020 model of the R2D DeBreather has been tested in the US by a Final Exit Network research team and by Exit International in the Netherlands. Testing involved monitoring the level of oxygen and carbon dioxide in the system. The unit was checked for ease of po- sitioning of the chin strap, the effective sealing of the facemask, and the overall comfort of the R2D.
US tests had three volunteers breathing down the oxygen to the pre- determined point of 14%: which is equivalent to an altitude of 3000 meters. As one FEN researcher, Neal Nicol said, ‘the mask was com- fortable and it took only a few minutes to get the O2
dropping at a rate of ~ 2%/ min. There was no significant rise in CO2 level, and no leakage detected,.even with a beard’. Time to loss of
consciousness was predicted to take ~ 10 mins.
In the Netherlands, an air pump circulated 12 liters of air through the closed system @ 2 liters/ minute. A burning candle was used in the experiment - a candle consumes oxygen at approximately the same rate as an adult (250 ml/ min). Levels of oxygen and carbon dioxide in the system were monitored. Again, no detectable rise in CO2
detected, and the oxygen level dropped steadily until the flame was extinguished.
In all trials, when the facemask was fitted and the DeBreather at- tached it was found to be comfortable and breathing was easy. With the R2D facemask it is possible to recline comfortably (unlike with the Exit Bag). This means the DeBreather could be used outside, at the beach, in the forest etc. One could lie back and gaze at the (fad- ing) stars. Drifting to one’s death.