Originally Posted by Silver Goose
Residential window units are designed to collect the condensed water in a tray and the condenser fan is designed to sling this water into the condenser fins which aids the efficiency of the system. The excess water is allowed to drain out the end of the housing. Since the condensate does not contain minerals, it doesn't clog mister jets and deposit a residue. I've wondered why RV rooftop A/C units don't take advantage of this and have assumed it is a design compromise to keep the profile low using squirrel cage blowers. An inventive soul who designs a reliable way to move the condensate to the condenser fins may find a pot of gold at the end of this rainbow.
That's what Carrier did on their regular profile models. They called it a "slinger wheel" and claimed it eliminated the need for a drain. (See Carrier Heat Pump for your RV - PPL Motor Homes
Might work in the desert, but in humid areas you still get drainage down the side.
Carrier exited the RV market a few years ago. Apparently there wasn't a pot of gold there.
The 15,000 Heat Pump model that I have has been a good unit, though.
As far as perry's comment about the misters, Arkansas may not be a dry climate, but it got me by till I got the Carrier unit installed: