no, no heat in BHO, you can whip (coffee warmers work good) it but not really heat it. making a pure extraction is not like making green dragon or Butter for cooking. Heat is not need to to extract a pure product. The process of making pure weather in BHO or Ice-O-Lator is similar in that they freeze the bud making the tircomes brittles and manageable and able to handle.

NO heat MORE cold in making pure