THIS AIR CONDITIONER FROM SAMSUNG HAS A 4 STAR RATING THUS IT WILL IMMENSELY SAVE YOU UP ON YOUR ELECTRICITY BILL.THE AIR CONDITIONER HAS A IMPRESSIVE BUILD QUALITY AS IS ALWAYS THE CASE WITH SAMSUNG AIR CONDITIONERS AND PROVIDE VERY ROBUST COOLING WITHIN A MEDIUM SIZED ROOM AS IT IS OF 1.5 TON.THE CONDENSER IS PROBABLY MADE OF COPPER AND THUS SAVES HEAVILY ON ELECTRICITY CONSUMPTION PROVIDING EFFECTIVE COOLING.SAMSUNG SUPPORT IS ALSO VERY GOOD.