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The unmatched construction increase happened in last decade and the domestic construction from late 80s can be labelled as inefficient energy units. Building sector consumes energy more than 54 % and residential sector around 24 % in north region. The rising cost of per unit energy is huge concern especially the cooling loads. The inefficient houses are raising the peak demand becomes a challenge to meet the demand versus generation. This issue must be addressed at micro level. The major energy loss happened through windows (being the crucial component of building services) and more heat inside the building than other components such as wall, roof etc. This paper investigates the possible reasons and gaps that why residential sector is not susceptible towards sustainable windows to lower their electricity bills. The research carried in two phases and questionnaire is framed to gather the data for analysis with aid of experts and literature reviews. It is concluded that awareness of occupant plays a pivotal role in advancement of sustainable windows besides other crucial factors such as orientation, make, glazing type etc. The collective efforts of architect, engineer, vendors and occupant can bridge the gap to reduce energy consumption. The initial cost of sustainable windows can be offset with savings and aid of government policies. [ABSTRACT FROM AUTHOR]

Energy consumption has become the challenge especially in developing countries such as India and China. In recent times, increasing fears about the environmental impressions of energy consumption and global warming has exaggerated this concern. The building sector is consuming one-fourth of the share at state level power consumption in Punjab where the procurement of coal even becomes the challenge and thermal plants needs to be stopped leading to almost blackout in the state. This paper examines the energy saving conformations leading to reduction in energy management of the building. To achieve this, a residential building is modeled in Design builder software and simulation is carried with Energy Plus integrated tool. In this paper, simulation were carried out with variety of double glass formations with infill material such as argon and air in gap of 12 mm. Full year simulation was performed for the composite climate. Simulation results indicated the considerable reduction in solar gains by 28.28% and cooling load by 27.08%. Further, initial assessment was carried out by calculating approximately the cost of double glass unit and payback period for different window formations. It is recommended to use the double glass unit empanelled window formation which has the potential to reduce the electricity bill considerably. The initial cost is approximately 2.12 times more than traditional window which be offset by the savings over energy consumption. [ABSTRACT FROM AUTHOR]