It is a very good idea to go to a 30amp circuit. You will notice a big improvement. If you do go to a 30amp breaker, you must use 10awg wire! Either that or you better get more fire insurance. I have installed 10awg on a 20amp breaker and was tripping the breaker all the time. I went to a 30amp breaker and never had any trouble since. Now I use three dedicated 30amp 10awg circuits and love it. A friend of mine installed 8awg wire and said it was an improvement over his 10awg wire. But use atleast 10awg. John