Yes, aluminum profiles can be used to reduce heat loss or gain in buildings. They are often used in combination with thermal break technology, which prevents heat transfer across the aluminum frame. This technology can significantly improve a building's energy efficiency by reducing heat conduction through the frame. Additionally, aluminum profiles can be used in the construction of energy-efficient windows and doors, further enhancing insulation and reducing heat transfer. The lightweight and durable nature of aluminum also makes it an attractive material for sustainable building practices.