Size of droplets departing from radiant cooling ceilings was studied experimentally.
Radii of coalescence-induced jumping condensate range from 100 μm to 300 μm.
Evaporation of droplets dripping from radiant ceiling to human skin can be neglected.
Human perception of fallen droplets was studied via a psychological experiment.
Sensory threshold size for fallen droplets was found to be a radius of 325 μm.