This unit is well built. Put 30 pounds of 464 in it amd turned it on to 185F. It was melted in an hour. Be sure to keep the lid on so you melt your wax fast. Stir about every 15 minutes amd turn the top burner off at the 30 min mark. The wax will actually be about 200F, but after pouring into a room temp pouring pitcher and adding frag oil, you will be right at 185F. You csn back the temp off at this point to 175 and you will be gold. Even after tirning off the unit it only loses 10 degrees an hour. Well insulated and well made.