The Excel AC/DC is a standard 115 volt Excel unit, but with 1" safety drains at the rear and dual (2" and 4") vent stacks.
The unit uses the regular 2" vent when 115 Volt power is available and defaults to the 4" NE vent when it is not.
A 12 volt 1.4 watt fan is included for use in the 4vent.
The Excel AC/DC is for those with generators operating over 12 hours per day, or for people that expect to have continuous 110 volt power available in the future.
The 1" overflow drain on the Excel AC/DC should be connected if the unit is being used heavily in AC mode, and if it is being used in DC or non-electric mode. It will only evaporate all liquids while working in the AC mode continuously. Click here for more information on handling excess liquid.