For energy efficient houses, it is a priority to choose windows that provide superior thermal insulation, in order to reduce as much as possible the costs of home maintenance, without affecting the desired degree of thermal comfort.

There are several concepts and standards of energy efficiency for buildings; of these, the most popular are the passive house and the energy efficient house. The differences between them are established by the heat transfer coefficient and the annual energy consumption. A home can be certified as a passive house if the energy requirement is less than 15 kWh/sq. m/year, and an energy efficient house must not exceed the energy requirement of 45-50 kWh/sq. m/year.

The best profiles for insulated windows ensure a very low heat transfer coefficient, for the lowest possible heat loss. Choose energy efficient windows and doors with a heat transfer coefficient between 1.12 – 0.80 W/m2K. Emphasize tightness and the removal of thermal bridges. Opt for hardware and insulation systems with gaskets to seal windows and remove bridges between joints.

Choose premium windows that are equipped with multiple air chambers inside and have profiles with a depth of over 74 mm. Opt for the installation of 3-sheet glass packages containing solar-controlled glass.  Look at all your options https://boext.com/.