One factor to think about for your Commercial window installation is energy efficiency. Many manufacturers have put a lot of money into the development of windows that can help reduce energy costs. As sunlight shines into your home, it raises the temperature, which can cause the air conditioner to kick on more often. In the winter, thin single-pane windows allow more warm air to escape, causing the heater to run longer. The wrong type of windows can cost you hundreds of dollars per month and thousands of dollars per year in electricity bills. Windows are available in single or multiple panes. Single-pane windows are less expensive and let in more light. Multiple pane windows typically cost more, but they provide better insulation and reduce energy costs.