Iranian Society of Heating, Refrigerating, and Air Conditioning Engineers (IRSHRAE) Journal of Renewable and New Energy 2423-4931 12 1 2025 03 21 Evaluation of double skin façade application to reduce energy consumption in cold and dry climate (Case study: A commercial building in Karaj City) Evaluation of double skin façade application to reduce energy consumption in cold and dry climate (Case study: A commercial building in Karaj City) 72 80 212610 10.22034/jrenew.2025.212610 FA Ali Khaleghi Babaee Master of Architecture, University of Guilan, Rasht, Iran. 0009-0000-3055-6980 Ardalan Aflaki Assistant Professor of Architecture, University of Guilan, Rasht, Iran. 0000-0001-5489-0430 Masoumeh Mirsafa Assistant Professor of Architecture, University of Southern Denmark, Copenhagen, Denmark 0000-0001-7725-818X Journal Article 2024 06 06 High consumption of energy in commercial buildings due to public use at different hours leads to irreparable consequences, including damage to the environment. As an effective building component in radiation control, facade plays an important role in reducing energy consumption. Unfortunately, in recent years, attention to the aesthetic dimension of the building has caused the role of the facade and the use of up-to-date techniques in the field of building technology to be less investigated as an effective energy reducer. The current study, by using a double-shell facade instead of a single-shell facade or a combination of single-shell and two-shell facades in a commercial building in Karaj, investigates the role of using double-skin facades and combined facades in reducing heat and cold loss through walls. The study conducts library and documentary studies to conduct research background, and establishes simulation method using Design Builder software to measure the effectiveness of the mentioned technique in cold and dry climate. The results of the study show that the consumption of gas and electricity in the coldest and hottest months of the year in the combined facade compared to single skin facade is reduced by approximately 20% and 15%, respectively. On the other hand, due to the insignificant reduction of energy in the comparison of two-layer and combined facades, in order to reduce the costs of construction and execution in the building, the combined facade has a better justification in cold and dry climates. High consumption of energy in commercial buildings due to public use at different hours leads to irreparable consequences, including damage to the environment. As an effective building component in radiation control, facade plays an important role in reducing energy consumption. Unfortunately, in recent years, attention to the aesthetic dimension of the building has caused the role of the facade and the use of up-to-date techniques in the field of building technology to be less investigated as an effective energy reducer. The current study, by using a double-shell facade instead of a single-shell facade or a combination of single-shell and two-shell facades in a commercial building in Karaj, investigates the role of using double-skin facades and combined facades in reducing heat and cold loss through walls. The study conducts library and documentary studies to conduct research background, and establishes simulation method using Design Builder software to measure the effectiveness of the mentioned technique in cold and dry climate. The results of the study show that the consumption of gas and electricity in the coldest and hottest months of the year in the combined facade compared to single skin facade is reduced by approximately 20% and 15%, respectively. On the other hand, due to the insignificant reduction of energy in the comparison of two-layer and combined facades, in order to reduce the costs of construction and execution in the building, the combined facade has a better justification in cold and dry climates. https://www.jrenew.ir/article_212610_705a72d922ecdc6a54d2eb28b8497fee.pdf