Vortex Cooler Model 7875SSDual Vortex Cooler Systems, continuous operation, consist of two Vortex Coolers, two Cold Air Ducting Kits, and an Air Line Filter. Click on the Model specification link for details of the system.
Model 7875SS Data Sheet/ specifications 
Model #: 7875SS  Dual Vortex Cooler System (5000BTUH)
Continuous operation, 70 SCFM, 1/4″NPT inlet, with air  filter, and ducting kit:  5000 BTUH (1250 kCAL/hr).  No electrical connection required.  Complete with (2) 727SS-35H Coolers, (2) 701M-43 ducting kits, and 701S-40A air line filter.
Recommended products: 701S-54