How do DX HVAC Units Work for Events? Posted October 18th, 2016 by admin & filed under DX Units, Event Cooling, Event Rentals, Horizontal Package/DX Units, HVAC, HVAC Rentals. Our technicians are very animated. They can be a bunch of characters. For more info check out our DX HVAC Unit page. Remember to download our free digital catalog while you’re here! Comments are closed.