When terminating a chimney for a medium heat appliance, how high must it extend above any building within 25 feet?

The chimney for a medium heat appliance must extend at least 10 feet above any building structure within 25 feet. This requirement is in place to ensure that the emissions from the chimney are adequately dispersed and to minimize the potential for smoke and harmful gases to enter adjacent buildings or spaces. When a chimney is properly terminated at this height, it helps promote efficient ventilation and reduces the risk of downdrafts that can occur if the chimney is too low. Additionally, following these guidelines promotes safety and efficiency in heating applications, ensuring that the appliance operates effectively.