Aluminum strips contribute to energy efficiency primarily through their use in thermal insulation and reflective properties. In building construction, aluminum strips can be used to create airtight seals around windows and doors, reducing heat transfer and drafts, which in turn lowers the need for heating or cooling systems. Additionally, aluminum's reflective nature can be utilized in radiant barriers, which reflect heat away from buildings, reducing the energy required for cooling. In electrical applications, aluminum strips are used in high-efficiency transformers and electrical conductors due to their high conductivity and light weight, reducing energy loss during transmission. Overall, aluminum strips enhance energy efficiency by minimizing heat loss and improving the performance of energy systems.