I run SS21 inks without ventilation. If I print all day I can tell it but it's not that bad. When I got the printer I did not get the add on heater and ventilation system because I had plan on rigging something up. I just have not got around to it yet. But now I think I'm going to order the heater because the inks are not dry sometimes when it gets to the take-up reel.
Grimco here in N.C. dose not stock the ES3 they said they have never installed any Mimaki's around here with ES3 inks