The stand-alone mod S.T.A.L.K.E.R. Anomaly aims to be the most stable and customizable experience for fans of the S.T.A.L.K.E.R. games. It's powered by the Monolith 64-bit engine, a custom fork of the X-Ray engine.
Some fix for 3 Sunrise suits (loners, clear sky, scientist) which down speed damage in burn anomalies.
The reason for this is we found that the lower the number the less damage you take. It's reversed for thermal damage for some reason.
I ask developers this is not their decision, but just a mistake.