How many BTUs needed to kill mildew and mold?

To kill mildew and mold, temperatures must typically reach around 140°F (60°C) for at least 30 minutes. The exact BTUs required depend on the volume of air or the size of the area being treated, as well as the initial temperature and humidity levels. For example, heating a 1,000 cubic foot space from room temperature to the necessary level may require approximately 10,000 to 20,000 BTUs, but specific calculations will vary based on conditions. It's best to consult a heating professional for precise assessments based on your specific situation.