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I don't agree with that AT ALL.
It's still a free country
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They're called air conditioners, and not coolers, for a reason. If anything, the operating margins with window units are much smaller and less forgiving.
I beg your pardon?
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Because the system losses with a window unit are usually smaller, and the room volume less, an overcapacity window unit will not dehumidify properly, will cycle excessively, will use MORE electricity, and will have a shorter service life
This goes under the false assumption that you're attempting to mimic central air like conditions in a compartmentalized/modular manner.
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(unless you keep it at meat locker temps).
Which I think I eluded to in my post (I may have left that off).
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It's the same as with a central system, except on a smaller and more intense scale.
This I might have left off. No one thinks a heat pump outlet temp is "warm". It's the same with central air. You're missing the perception aspect of it. With a heat pump you will not feel the warmth from the radiant surface (baseboard/radiator/whatever) ..nor will central air automatically soak up everything you're emitting at the moment. Sizing is surely critical for de-humidification (duty cycle) ..and I have no argument with that. In fact, I tell everyone NOT to go bigger on central air units.
Window units, OTOH, I see no issue with putting them on FULL and leaving them on to do whatever they're gonna do. I LIKE COLD AIR ..not just sensibly comfortable. That level of output would be difficult for a central air unit at anywhere near the same cost.
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A well-designed window unit, properly sized, will condition as well as a central system,
Again, this is under the assumption that one feels central air provides "well conditioned air" as I define it.
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to the same temperature, and comparable humidity levels, albeit with greater local air movement and noise.
Again assumes that the same temperature is desired. The local air movement is one advantage of merit something lacking in most central air systems.
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They also don't run them 24/7 like a central unit, but tend to flip them on high/max to quickly cool off a steaming hot room, winding up with that "clammy" cold that window units are sometimes known for.
That's their advantage. A central air unit takes a long time to effect change from set point. A window unit does not. I an "open ended" max duty cycle, the window unit offers rapid cool down allow the unit to remain idle when that room or area is not in use.
Naturally, if you're putting on a blanket to watch television, it's probably time to turn the thing off.
There's sensible limits to window units. For a bedroom, you're not (probably) going to run a dedicated power source. You're going to be using 120VAC. That pretty much limits the size of your unit. Now a living room that's open to a dining area?? There a 12k or more is not a waste.