Homes with old windows typically have energy bills that are 25% more than an average bill. Our customers that replace single-pane windows save up to $400 a year in heating costs! Moreover, choosing energy efficient windows reduces your carbon footprint.
The most important factors to consider when picking out windows to optimize energy efficiency are the U-Factor and the Solar Heat Gain Coefficient (SHGC). The U-Factor measures the window insulation. It ranges from 0.20 to 1.20. The lower the number the better. High Quality, double pane windows usually have U-Factors less than 0.30. Furthermore, triple-pane windows can have U-Factors as little as 0.15!
The Solar heat gain coefficient (SHGC) is the amount of solar radiation that is able to pass through a window and released as heat into the home. Windows with high SHGC ratings are great for cold Connecticut winters. They can reduce heating costs by absorbing heat from the sun. We usually recommend that our clients looking to reduce winter heating bills look for a Solar Heat Gain Coefficient between 0.35 and 0.60.