What is Rebreathers?

When you breathe, your body uses the oxygen you inhale and exhale the carbon dioxide waste. A rebreather is an advanced scuba gear that recirculate what you breathe:

  • Removing your exhaled carbon dioxide
  • Replacing the oxygen that you have consumed.
  • Controlling the oxygen concentration in the breathing loop.
  • With a rebreather you can recycle what you breathe over and over again!

Diving With Closed Circuit Rebreather.

Are you ready for the greatest dive innovation since Jacques Cousteau’s aqualung? Closed Circuit rebreathers (CCR) are created around a simple principle of a one-way breathing loop. One hose takes the gas exhale by the diver to a CO2 scrubber, and another brings it back filtered, refreshed and recycled to the diver’s mouth.

Rebreathers have been used for a long time by military and scientific divers, but every day more and more divers make the switch and join the CCR ranks. For example, nowadays it is very popular in underwater photography because of the benefits in marine life interaction and among technical divers because of the efficiency and safety in preparing extended range dives.

Rebreathers Pros

Deeper and Longer

A rebreather’s efficient use of gas makes for much longer no-stop times and as nitrogen loading is reduced thanks to oxygen-rich mixes, decompression time is also greatly reduced.

Get Closer to Marine Life

The absence of bubbles and the resultant noise allows much closer interaction with marine life.

Stay Warmer

Gas returned to the diver after passing through the scrubber is warmer and more moist than that of open circuit scuba. The risk of dehydration is also lessened by this exothermic reaction.

Keeping it Compact

The size and weight of a rebreather in comparison to an open circuit diver’s multiple tank equivalent – especially for deeper, more technical dives – can save space in the car, on the boat and strain on the back.

No More Gas Guzzling

Gas efficiency means no more dashing to your local dive store before closing time for a fill and relaxed surface intervals with no need for cylinder changeovers.

Rebreathers Cons

Starting Over

It’s a whole new world of diving with complex kit, unit-specific training and a more disciplined approach – almost like learning to dive again.


Initial costs are high with training and purchase prices running into the thousands. Consumables such as scrubber material, batteries, O2 sensors as well as service costs should also be factored in.


Unlike the open circuit kit diver’s simple ‘dunk and dry’ outlook, the  CCR diver must follow comprehensive pre and post dive assembly and disassembly procedures for their unit.


If you’re used to a single lightweight cylinder or are a frequent flyer, the size and weight of a rebreather may be an inconvenience too far.


If your dive center or regular buddy don’t have experience with rebreathers or are resistant to change you may find  it difficult to achieve your CCR goals without moving on.

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