Community Alumni
Aug 23, 2017An easy way to verify would be to pull the trim ring for the vent and have a look in the cavity. If there's a duct sitting there waiting for a connection then you'd want to use a ducted AC. If not then you'd want a standalone unit. Most trailers that I've seen that come with a 2nd AC option are designed for a stand alone unit in that spot. Ducted or not, it will be effective with reducing the temps quickly.
I would caution against trying to tie into the duct system when it's not designed for it. A lot of these trailer have a duct system designed for one AC. When you tie in a second AC then the efficiency goes down as both ACs try to force their air through the duct work.