My apartment has four rooms with windows, but only two have window a/c units. I definitely felt that this kept the room colder for longer even after I switched from cool mode to fan mode. Anecdotally, the quiet mode is notably lower volume than the low cool mode on the window a/c unit that’s currently in my bedroom. Tom PriceNot So Final ThoughtsInstead of buying multiple window units to cool off rooms in my apartment, I cut the cost in half and used the GE Profile portable air conditioner. Other Portable A/C Units We Recommend