Just my opinion on these. First Rob found one from Gmarket that was much cheaper, this one, if you get the mounting kit is $90, his is something like 25,000 won. You will still need some kind of control as it only comes with a plug. One thing you have to watch here in Korea is the wattage. A 3kw element will use about 13.6 amps at 220v, 3500 16amps (watts/volts=amps). Most apartments I have seen have a 20amp for each side of the the apartment (2 for all the outlets in the house excluding the AC), that includes anything else you have running on that side of the apartment, refrigerator, rice pot, coffee pot, computer, etc. The 4500 watt will use about 20.5 amps alone. The recommendation is for a 30 amp 220v circuit, my main breaker is only a 50amp. It would be my suggestion that you go with no more then a 4kw, from Gmarket.

One thing you can do if you keep tripping the breaker is plug it in where the living room AC is plugged in. They are normally on their own circuit so you don't have to worry about the Refrigerator coming on, the rice cooker, the coffee pot, tripping the breaker.

The idea that you just drop it in the top and remove when you chill would be nice as well.

If you had a brew tree maybe worth while but I don't see having one of those in my apartment.

http://homebrewkorea.com/forum/discussion/367/immersion-heater-element/p1