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The increasing requirements in building thermal and energy performance standards and the need to design nearly zero-energy buildings, while still enhancing the indoor comfort conditions, have led to a demand for more efficient thermal building envelope solutions. Knowledge concerning the performance of building thermal envelope solutions and the existing design support tools, such as building performance simulation, is crucial for stakeholders to make informed decisions with respect to the definition and implementation of energy efficient strategies for new and refurbished buildings. The results of U-value of the windows through actual physical experiments show that, in the case of aluminum windows, the U-value corresponding to Grade 3 (1.4-2.1 W/m SP 2 sp -K) was as high as about 60%, whereas in PVC windows, Grade 3 (U-value of 1.4-2.1 W/m SP 2 sp -K) accounted for about 35%, and Grade 2 (U-value of 1.0-1.4 W/m SP 2 sp -K) for about 29%. Moreover, component-level and whole building numerical simulations were performed under cooling-dominated and heating-dominated climate conditions to investigate the energy benefits of applying the TAC system to the external walls of a typical, single-family residential building. [Extracted from the article]