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C 12 H 22 CdN4O14, triclinic, P¯ (no. 2), a = 7.188(2) Å, b = 8.895(3) Å, c = 9.771(3) Å, α = 63.148(3)°, β = 76.750(3)°, γ = 66.225(3)°, V = 509.2(3) Å 3 , Z = 1, Rgt(F) = 0.0253, wR ref (F 2 ) = 0.0676, T = 296(2) K. CCDC no.: 1484775The crystal structure is shown in the gure. Tables 1 and 2 contain details of the measurement method and a list of the atoms including atomic coordinates and displacement parameters. Source of materialThe title compound was synthesized by a hydrothermal method under autogenous pressure. A mixture of CdCl 2 ·H 2 O

The significant share of energy consumption of the building sector in the total energy consumption makes it responsible for 36% of CO2 emission in the European Union. In the last decade a key objective of the EU is to improve the energy efficiency and increase the use of renewables in buildings. Ground-to-air heat exchangers can be a solution for reducing primary energy consumption from nonrenewable sources in buildings and contribute to the share of energy from renewable sources. The research in this paper deals with investigations on a ground to air heat exchanger of a pilot energy efficient building, constructed in west side of Romania. The study presents the assessment of the heating and cooling energy potential of the ground-to-air heat exchanger serving the energy efficient building. Three full years of measurements of the air temperature entering the ground-air heat exchanger and the outlet air temperature are available and were used in the study. A comparison is made between the energy potential determined based on temperature measurements and the energy potential based on calculated outlet temperatures using a computational model and conventional climate data for the building location.

Metamaterials are specially designed to interact, in a controlled manner, with various waves. They are very "young" but they have attracted the attention of specialists from the construction area. The buildings have known throughout their existence different approaches in terms of functions, requirements, concepts, materials used, and other, in correlation with the level of civilization, technology, climate characteristics, primary needs, or desire to express the power/the luxury in the different moments and for different people. The concept of the nZEB building was recently promoted. The metamaterials developed so far can also be used in nZEB, such as: for controlling the impact of the different waves with the building; in the equipment of thermal/visual comfort; in the control components; for increasing the performance of power generation equipment. This paper has inventoried some metamaterials that can determine the growth of the building's energetical performances and examples of the growth potential of the thermal and visual performance of glass systems containing metamaterials (static and dynamic).