What 1.3 ATA means in practice

1.3 ATA is four pounds per square inch above the room you are standing in. On the mild chambers — Solace, Respiro, Vitaeris, Quamvis — that is the operating point. It is reached gradually. A full rise takes on the order of seven minutes, slow enough for ears to equalise.

The air is ambient air, not an oxygen cylinder. A double-headed oil-less compressor draws through dual intake filters, then an inline filter rated to 0.01 microns, and delivers it through a short top-grade hose with quick-disconnect couplings. Compressors in this line are made in the United States, as are the chambers.

Inside, two redundant regulators hold the set pressure, and they are tamper-proof. Zippers are the way in and the way you close yourself in — the point of the design is that a second person is not required. An extra port passes cables when a session needs a device outside the bladder.

Windows are there so the room’s own light does the work. No internal lamp to maintain. The steel frame is powder-coated with a non-toxic finish; it keeps the shape and shortens inflation.

In the EU and the UK these mild chambers are wellness devices, not medical devices. Anyone specifying for a clinic should treat that sentence as part of the product, and ask the desk what Fortius changes if a higher ATA is actually the requirement.