What is the energy cost savings percentage from installing new aluminum windows?

Installing new aluminum windows can lead to significant energy cost savings due to their improved thermal performance and insulation compared to older, less efficient windows. Typically, the savings percentage from such an upgrade falls between 10% to 20%, depending on various factors including the existing window condition, local climate, and building energy efficiency measures in place.

Choosing 18% as the estimated savings correlates well with the expected performance of modern aluminum windows, which are designed with better insulation properties and enhanced energy efficiency technologies such as low-emissivity (low-E) coatings and insulated frames. This percentage reflects a realistic expectation of the financial impact on energy costs following an investment in higher-quality window systems, which are aimed at reducing reliance on heating and cooling systems throughout a year.

It's also worth noting that while higher savings percentages, such as 22%, might be aspirational in some specific scenarios, they may not represent a typical outcome. Each project will vary based on installation quality, specific window specifications, and overall building design efficiency. Thus, the 18% savings figure is a well-rounded estimate based on industry data that architects and builders frequently refer to when recommending window upgrades for energy efficiency improvements.