Eppendorf/New Brunswick
Old New Brunswick Systems
If the model number ends in XX30, its got refrigeration.
Current Model New Brunswick Systems
If the model number ends in "R" it is refrigerated. However, the R will NOT appear on the front of the system. You have to check the back label.
Thermo Scientific
Thermo Scientific MaxQ 4000
If the model number ends in "-7" it is a refrigerated system
440
Not refrigerated
490
Refrigerated
MaxQ 8000
If it has a "-7" at then end of the model number. You will also be able to see a larger refrigeration module mounted on the right side (If you are facing the instrument.)
Infors
You have to call the company. We currently do not know how to tell.