just my opinion, if you are going for value for money and quite, Toshiba is it! 22db noise level even for the non-inverter type. Only Starmex has it at 21db but if i'm not wrong, only for their inverter type. There is another solid feature about this Toshiba, Confort Sleep, which automatically adjust the environment temp upward as your body temp falls while you sleep..... check it out... !!