Air conditioners are usually quite noisy though you can find quiet air conditioners.
Portable air conditioner vs window air conditioner.
The replenishment air will come from any area of the house with an air leak making that part of the house even hotter and more humid than if you didn t have the portable running at all.
Portable air conditioners are usually around 100 more expensive than window air conditioners of the same cooling capacity.
That s because window air conditioners are usually much quieter than portable air conditioners.
Portable ac units hover around 70 db while window ac units tend to be near 50 db which is one eighth quieter.
The fact that a window air conditioner uses a compressor that is situated outside the room should in theory make them quieter.
For the most part when it comes to portable ac vs window ac the window units win.