Abstract: A system includes (a) an image forming station including multiple print bars arranged along an axis and configured to apply to a substrate being moved along the axis, droplets of printing fluids having multiple colors, respectively, and (b) multiple dryers, which are mounted on the image forming station, and are interleaved with the multiple print bars along the axis, the multiple dryers are configured to dry the droplets applied to the substrate for forming an image on the substrate, at least a dryer among the dryers includes: (i) an illumination assembly, which is configured to dry the droplets by directing the optical radiation to impinge on the substrate, and (ii) a temperature control assembly, which is configured to control a temperature of the substrate by directing a gas to the substrate, the illumination assembly and the temperature control assembly are packaged together in a housing.