Vernacular construction technologies are based on centuries of practical wisdom, refined through countless trials and errors. This process eliminates all irrelevant aspects, creating highly efficient and simple systems that are intrinsically adapted to the local climate and resources. These methods demonstrate how to conserve heat with minimal energy, offering valuable insights for modern buildings, promoting energy efficiency, and environmental harmony. In this article, we have already covered traditional passive cooling techniques, such as Persian wind towers and Arab mashrabiya. Now, we turn our focus to strategies applicable to cold climates, exploring effective solutions for heat retention and space heating.