Lots of good feedback!
So I went to YouTube to better understand the features and benefits of a dual exhaust hose Portable AC unit vs. single exhaust hose Portable AC unit and this is what I found:
Part 1 of this thread has to do with how to power a portable AC and I think we have those options well understood. (Much appreciation to you electricians.)
Part 2 has to do with choosing the right portable AC... with these features:
* Dual exhaust vs. single exhaust.
* 14,000 BTU or less units so you can run a 15A/20A standard plug.
* Option for self-evaporation to avoid the need to empty a water bucket and/or to plumb a drain line
* Option for Dehumidifier
* Option for Heat Pump.
REMEMBER ==> I plan to add this Portable AC unit to my RV... that only has 400 sq-ft (albeit with R10 insulation)... and this environment has a primary-basement AC unit that is both cooling and dehumidifying the air in the RV the Portable AC will be using.
That said, not everyone's experiences with a portable AC in a home will apply to an RV.
...And while one person said they used a portable AC in a boat, my guess is that this is the only AC in their boat; and therefore their "closed system" is not the same as my "closed system" in my RV (with a Basement AC).
SIDE NOTE: My RV has a basement AC and I love it... its very quiet and efficient after I got more cooling by doing this:
I Got More Cooling & Better Heat From My Basement AC Doing This! - Winnebago Owners Online Community
TO CLARIFY MY PROJECT AT HAND: I'm looking to add a second AC to my RV -- and I fully expect my primary-basement AC to be capable of keeping my inside temperature in the 80-85F range on a very hot day.
However, I also know my basement AC is working at maximum capacity; and my goal is to A) Take to strain off the basement AC; and B) To lower the inside temperature to 72-78F by adding a supplemental Portable AC unit.
QUESTIONS:
1) With a single exhaust AC working in conjunction with my basement AC, do you think I can count out dropping my inside air temperature to ~72F? .
Note: From what I have researched, the single exhaust AC is less efficient than a dual exhaust AC, in general, but that may not be considering the outside air temp over 95F; and it may be mostly based on the concept that Negative air pressure (vacuum) will suck in hot air from the outside... though all the leaks in your "closed system." So I have to wonder what benefit I would get from a dual exhaust Portable AC unit. ...And I most certainly DO NOT want to cut a second exhaust/intake hole in my slideout. So I don't see using a dual exhaust Portable AC unit as being viable.
2) Do dual exhaust Portable ACs cool any better than single exhaust ACs when the outside air temperature is over 95F and the humidity is over 70%?
3) I think my basement AC operates like a "Window AC" in a home. Is this true? I.e., I counting on it handling the air exchange to eliminate "negative air pressure" caused by the portable AC. Is this true?
In summary, I see the Portable AC operating as a "Supplemental AC." And my hope is that my basement AC will help my Portable AC unit work easier and better; and my other hope is that my supplemental Portable AC will help my basement AC work easier and better. Is this going to be true?
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