Replenishment of Insulation and energy deficiencies in a building can be through the introduction of high-performance windows that are thick and can guarantee diminution loss of warmth during winter. Moreover, the windows with low E have capabilities of keeping heat either in or out (Simmons 2010, p.62). These windows can be put in the rooms where workers will spend a large proportion of their time. It is essential for the internal thermal conditions to be conducive for the inhabitants to be comfortable.