• Sourav Kumar
• Sujal Agrawal
• Harpreet Singh
• Kaustuv Shandilya
• Pema, Sunny Kaura

Traditional windows need to be effectively optimized and more efficient to reject the solar heat during summertime and trap the same heat in winters to make the building more comfortable. Also, reduce the heating and cooling energy consumption annually, to make that work properly we must adjust the building's orientation and fenestration system. The main aim of this review paper is to analyze the efficiency of the windows and compare their properties in a regular commercial building. Newly designed windows as a substitute for traditional windows are used in commercial buildings nowadays for various purposes such as reduction of air leakage and improvement in insulation properties, help with moisture control, reduced the occurrence of condensation on windows and reduce the load on system. These windows not only help in saving the overall energy of a building and reduce the annual electricity bill but also provide durability. To improve the thermal performance of the building we need to focus on certain elements and make them function properly such as the window glass required, frame type and the glazing. These elements lead to an efficient building design having power saving capabilities and, also environment friendly. Other elements, such as the U-factor, visible transmittance (VT), and solar heat gain coefficient, are also effective in improving the building's health and making it more feasible in the case of optimized window design (SHGC). These factors help the designers to build energy efficient buildings without compromising any area in the field of designing and analysis and a proper balance between these factors is must to get the desired window design. Glass material used in the window manufacturing must be robust in keeping the occupants safe from sudden impacts inside the building, helps in annual power consumption and enhanced the properties of a building. The process of designing windows and analyzing its performance should be done properly with the help of various techniques and 3D software to get an optimum window type with maximum output and it also contributes to the environment safety.

U-Value Visual Transmittance Thermal Comfort Windows and Glazing systems Day Living System Solar Heat Gain Coefficient Window to Wall Ratio (WWR)

"REVIEW ON WINDOWS OPTIMIZATION FOR ENERGY EFFICIENT BUILDINGS ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 4, page no.20-27, April-2021, Available :http://www.jetir.org/papers/JETIR2104204.pdf

"REVIEW ON WINDOWS OPTIMIZATION FOR ENERGY EFFICIENT BUILDINGS ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 4, page no. pp20-27, April-2021, Available at : http://www.jetir.org/papers/JETIR2104204.pdf