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During design development, Parametric Analysis allows for a better understanding of the energy use in each building component. A series of simulations are done in which one component at a time is isolated. When the results are aggregated, a clearer picture the building energy efficiency emerges.
The largest impact is from changing the Solar Heat Gain Coefficient (SHGC) of glass windows, which is the element of the window energy penetration. Our study shows that if we set the SHGC to zero, the building’s energy use could drop by about 30%!
Cooling, which is the main energy consumer, is affected mainly by solar radiations through glazing. The designer should study the building’s window dimensions and glass type and consider external shading to avoid the more expensive cost of LoE glazing.
The second-largest impact comes from setting the lighting energy to zero. This can be done by exploring the different opportunities to reduce lighting wattage and use better lighting controls and sensors, and see if we can increase effective daylighting without adding cooling load due to solar gains.