Are there any window AC units that don't hang outside of the window (building requirement)? Or is a dual-hose portable AC unit my best option for an energy efficient AC unit?
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The whole point of window A/c is to hang outside the window so the waste/extracted heat is outside and not inside (as it would make the A/c unit useless.)
It sounds like a portable hose units your only option. (even thought they are less efficient than in window units)
Don’t dual hose portable AC units follow the same principle of venting the waste heat outside? As I understand it, the window AC units are still much more efficient at this as they don’t have a hose to push/pull it through.
Not all the heat is removed as the machinery of the A/c also get hot and radiates heat and all that cannot be remove by the hose. That is why the machinery for in widow units is physically outside the area you are trying to cool.
I dunno, our single hose portable A/C does pretty damn well for whatever it’s worth. Granted it’s not the most efficient thing in the world, but it really does work alright.
How loud is yours? I’ve got one that I avoid using because it’s too loud, much more than a regular window unit. It doesn’t sound broken, so I’m wondering if mine is just a bad model or if it’s a common trait.
I wouldn’t say it’s very loud, but it does make the typically expected A/C compressor and fan sounds. It’s not annoyingly loud, unless it’s sat up over the winter and hasn’t been run for months, but even then it tends to settle out more quietly after 30 minutes to an hour of running.
Ours is a Hayer HPQ10XCR-P3, though I’m sure there are a many models and manufacturers out there of similar devices. I can’t speak for the sound qualities of all of them, but I would recommend running them at least for an hour every few months to sling the lubricating oils around.