I'm looking for a portable air conditioner that can be moved from room to room. But the key thing I want is one that does not use a condensation tank. I know they exist because I have seen one. It diverted the cool side (refrigerant evaporator) condensation to the hot side (refrigerant condensor) and evaporated it into the heat exhaust air flow. I don't know if it used gravity or a pump to accomplish that. If the hot side is on the bottom it seems gravity could do this job to get the condensation from the cool fins to the hot fins.
Here's the problem I'm having with this search. What terminology is used to define this? I thought it would be "evaporative". But I'm seeing "evaporative" used for something different which requires chilled water to be added to the unit (definitely not what I want). Apparently it is this type (which I do not want): http://en.wikipedia.org/wiki/Evaporative_cooler
I searched for "tankless" but very little matched (and all too large, anyway).
So what standard term should be searched for, or asked of sales people, to get to the right type of air conditioner (refrigeration type, with condensation from the cool side fed to the hot side to evaporate through the heat exhaust tube (for portable unit where the tube(s) would go typically out a window)?
The specifications for many of these portable air conditioners list the tank size. And it looks like some have rather large tanks. Clearly these are not the ones to get. But with virtually all retailers regularly omitting many crucial specification on just about everything, I cannot trust the lack of a tank size specification as an indication that it evaporates the condensate.