The concept of an "optimum custom window" is inherently local. This paper demonstrates that by jointly optimizing U-factor, SHGC, VT, frame, and gas fill against lifecycle cost and comfort, designers can achieve energy savings of 40–70% compared to code-minimum windows. The key findings are:
The choice of material is critical in determining the longevity and maintenance requirements of your windows: Why Invest in Custom Windows for Unique Home Designs?
We define the optimum custom window as the assembly that minimizes a cost function $J$:
Optimum Custom Windows stands behind its products with a comprehensive warranty program, including: