A state-of-art review of retrofit interventions in buildings towards nearly zero energy level

Unmistakably, buildings retrofitting brings the possibilities to reduce energy use and greenhouse gas emissions. However, selecting specific retrofit strategies is complex and requires careful planning. There are already various technics of buildings retrofitting towards nearly zero energy level. Therefore, the focal point in this paper is the review of relevant solutions and the effect of their corresponding consequences on building energy efficiency as well as recommending renewable energy technologies. Further investigation on the feasibility of adopting these technics for cold climates requires thorough studies to be carried out through experiments or numerical simulations.