![]() ![]() Energy eįficiency approaches sometimes might not require additional capital investment. Air tightness and infiltration of building envelopes are discussed as they play a crucial role in the energy consumption of a building. Application of thermal mass as an energy saving method is more effective in places where the outside ambient air temperature differences between the days and nights are high. The effects of thermal mass and phase change material on building cooling/heating loads and peak loads are discussed. Various types of thermal insulation materials are enumerated along with selection criteria of these materials. Advances in energy efficient roofs including the contemporary green roofs, photovoltaic roofs, radiant-transmittive barrier and evaporative roof cooling systems are discussed. Performance of different fenestration technologies including aerogel, vacuum glazing and frames are presented. Different types of energy efficient walls such as Trombe walls, ventilated walls, and glazed walls are discussed. This article strives to make an exhaustive technical review of the building envelope components and respective improvements from an energy efficiency perspective. Due to environmental concerns and the high cost of energy in recent years there has been a renewed interest in building energy efficiency. In many of these buildings, the energy consumption can be significantly reduced by adopting energy efficiency strategies. For example, a holistic energy efficient building design approach can reduce the size of mechanical systems compensating the additional cost of energy efficiency features.Ī significant portion of the total primary energy is consumed by today's buildings in developed countries. Energy efficiency approaches sometimes might not require additional capital investment. ![]() ![]() A significant portion of the total primary energy is consumed by today's buildings in developed countries. ![]()
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