What a supplier answers before we specify
Each set is the standard a manufacturer satisfies in writing before purchase, and the basis on which an installed unit is verified afterwards. They are published so that the questions are known in advance, and so that a buyer outside our contracts can ask them too.
Throughout, what is stated is kept apart from what is verified. A figure is credible only when it is independently measured and given at the point of use, where a body actually sits, not at the emitter, the sensor or the display.

Red light diligence
11 questions. Version RLT-2026.1Photobiomodulation: the manufacturer question set. Throughout, what is stated is kept apart from what is verified: a figure is credible only when it is independently measured and given at the point of use, where a member actually sits, not at the diode.
Cold water immersion diligence
11 questions. Version CWI-2026.1Plunge and cold bath: the manufacturer question set. With cold water the highest-value answers are about water management: set point and stability, turnover, filtration, disinfection and logging, the figures the category routinely cannot produce.
Sauna and heat diligence
11 questions. Version HEAT-2026.1Sauna, infrared and steam: the manufacturer question set. The decisive answers are about air: air change rate and CO2 under real occupancy.
Compression diligence
8 questions. Version COMP-2026.1Pneumatic compression: the manufacturer question set. The dose in compression is pressure, so the decisive answers are about delivered pressure, calibration and sequencing, rather than the headline programme list.
The verdict
The pattern matters more than any single answer. A manufacturer with a real product answers quickly, and hesitation, redirection to marketing language, or commercial sensitivity, is itself the verdict.
Where a set escalates to on-site verification, its questions become the measurement plan: the same parameters, read in the room with calibrated instruments. Evidence and standards sets out the framework and the reference set each parameter is read against.