Protected by Heat Reflective Technology, Hurst uPVC door panels have a heat reflective skin which when combined with an extra high-density core, provides excellent insulation. uPVC doors are known for their good thermal insulating properties, which can contribute to energy efficiency in your home. The material itself has a low thermal conductivity, helping to reduce heat transfer between the inside and outside of your home. However, the overall energy efficiency of a door also depends on other factors like the quality of installation, the type of glazing used, and the overall construction of the door.