Left panel: distribution of the full EAGLE baryon gas mass content as a function of the temperature, normalised to unity at log T(K) = 3. Right panel: corresponding distributions of different components, relative to the full distribution: the bound phase (orange dashed line), the virial phase within R₂₀₀ (blue dotted line), and the gas on the outskirts of galaxies and groups of galaxies (outside R₂₀₀ but within FoF halo, green dash-dotted line). The black vertical line indicates the approximate lower limit for the hot WHIM (i.e. log T(K) = 5.5).