Drying of an image on print media in a modular commercial printer

A printer that comprises

• a housing having a pair of side walls, an upper cover and a lower cover;
• a print engine positioned in the housing and mounted between the side walls, the print engine comprising a pair of opposed print head assemblies that are positioned to print on each of a pair of opposed sides of a print medium passing between the print head assemblies, each print head assembly having a carrier that defines a number of chambers, a liquid fixative being received in one of the chambers and at least differently colored inks being received in respective other chambers and an array of print head chips being positioned on each carrier to span the print medium, each print head chip having a plurality of nozzles, so that ink and fixative can be ejected from the nozzles during printing;
• an infeed mechanism at one end of the housing for feeding the print medium between and past the print head assemblies, in a feed direction;
• an outfeed mechanism at an opposite end of the housing for feeding the print medium out of the printer;
• and
• a warm air duct that is positioned on one of the side walls to extend between the print engine and the outfeed mechanism, the warm air duct being configured to direct warm air across the print medium in a direction that is transverse to the fee direction to facilitate drying of the printed images on the paper.