Ozone and oxygen
Ozone destructor
An ozone destructor converts residual ozone back into oxygen before the gas is vented, usually over a heated or catalytic bed. It is standard on industrial ozone plant. Our position is that ordinary room ventilation is sufficient for a sauna and a destructor is not justified.
Also called ozone destruct unit, catalytic ozone destructor, wet airstream destructor
What it does
A destructor takes an exhaust stream containing ozone and removes it, typically over a catalyst such as manganese dioxide, sometimes with heat, so that what leaves the vent is oxygen. On an industrial ozone plant this is not optional — the off-gas would otherwise exceed occupational limits by a wide margin.
Wet versus dry
Catalytic destructor media are degraded by moisture. A sauna is a steam environment, so if a destructor is fitted at all it must be a wet airstream type, designed to tolerate a saturated gas stream. A standard dry catalytic unit will foul.
Our position
Salvagente saunas are not fitted with one, and a unit costing USD 2 000–3 000 is hard to justify for a sauna. Four reasons:
- Ozone’s half-life inside the hot, humid sauna is roughly 10 to 20 minutes.
- The generator stops producing five minutes before the session ends, so what is left has already begun decaying when the doors open.
- Moisture inside the sauna converts some of the ozone to hydrogen peroxide.
- An open door and window create enough draft to clear what escapes, and the room needs ventilation anyway so that the oxygen concentrator has air to work with.
The middle option, if you want one, is an extractor fan in the treatment room.
Reading that for your own room
Nearly twenty years of operating these saunas sit behind that position. A single-session home installation with an open window is a different situation from a small windowless clinic room running six sessions a day. If you are closer to the second, the useful question is what the ozone level in that room is at four in the afternoon, and answering it takes a meter.
Why it matters here
A destructor is a four-figure purchase, and for most installations it is not needed. Understanding the reasoning lets you judge whether your own room — its size, its ventilation, its daily session count — fits the assumptions behind that.