area ratio of window to wall?heat-transfer coefficient

Heat gain through the exterior window accounts for 25-28% of the total heat gain, adding to theinfiltration, it is up to 40 % in hot summer and cold winter zone of china, so it is important to carry outthe sustainable window systems design with low energy consumption. The effects of window systemsincluding area ratio of window to wall and categories of glazing on energy consumption of airconditioner (AC) are simulated by using eQUEST software.