• Amit kumar Dhir
• Pushpendra Kumar Sharma

Most of the countries are struggling to pace increasing energy demands and carbon emissions globally. Residential sector has significant role to play as it contributes a share of 27% in energy consumption and 17% in carbon emissions as per WEO 2017.Further windows play a significant role in buildings to mitigate the energy requirements and to reduce carbon footprints. At present researchers have carried out numerous modifications in windows and rare of them are tested experimentally as well, still nothing has been devised concrete. Many improvements tested or suggested as HISG, VT, DGU etc have been presented herein. The focus of this paper is to highlight the inputs across universeand their challenges in implementation. Most efficient glazing used commercially is HISG though VT window also shows remarkable results. The scope of HISG is very much limited in residential market due to its high payback period of 33.7 years. Payback period of VT is 14.34 years. Windows have the potential to save half of the energy consumption provided that it should be carefully designed and checked experimentally. Though many reviews are available in literature yet there is an urgent need to upgrade windows along with cost analysisfollowing guidelines being framed by many governments in their respective building code time to time. In the current review the authors have emphasized on need of investigation in regards to economical windows to reduce the payback period.

Payback period, Daylight, Energy savings, Heat insulation solar glass, types of glass for windows.

"A Evaluation For Role Of Suitable Glazing In Saving Energy", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.1030-1035, January 2019, Available :http://www.jetir.org/papers/JETIRDY06171.pdf

"A Evaluation For Role Of Suitable Glazing In Saving Energy", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp1030-1035, January 2019, Available at : http://www.jetir.org/papers/JETIRDY06171.pdf