How long are the intake and exhaust hoses on the ACPA4000?
The exhaust hose is 10 FT X 8 IN and yes you may have them ducted through a wall. The key point here is that the hot air still needs a way to escape so that it is not recycled through the unit. Please view Application Note 109. It applies to the ACSC10x, but the same rules apply for ducting the condenser section.