A Guide to Energy-Efficient Windows: What to Know and How to Buy
When shopping for new or replacement windows and doors, energy efficiency is a key factor to keep in mind. You’ll want to look into features that offer cost savings, better energy performance, improved comfort, and a positive environmental impact.
Why Choose Energy-Efficient Windows?
Whether you're upgrading existing windows or replacing them, enhancing the energy efficiency of your home's windows brings numerous advantages. These include lower energy bills, improved indoor comfort, and a reduced carbon footprint.
Money saver
In simple terms, ENERGY STAR® certified energy-efficient windows can lower your monthly energy bills while enhancing your home's comfort year-round. Poorly insulated or drafty windows can cause your home to consume more energy, resulting in higher bills and placing extra strain on your HVAC system.
More comfortable home
Energy-efficient windows can reflect heat during the summer and retain warmth in the winter, ensuring your home stays comfortable throughout the year.
Environmentally Friendly
Energy-efficient windows benefit the environment by lowering your home’s overall carbon footprint and extending the lifespan of its energy systems.
What Are Energy-Efficient Windows?
Energy-efficient windows have two key components:
Frame Materials
Vinyl enhances energy efficiency by providing strong insulation, reducing heat transfer, and preventing air leakage. It's durable, low-maintenance, and cost-effective, making it a popular choice for energy-efficient windows.
Double-pane (dual-pane) glass is more energy-efficient than single-pane, as the gap between panes provides extra insulation from heat and cold. Low-E glass is ideal for conserving energy, as it limits UV and infrared light, reducing heat transfer and improving insulation.
Glass
How can I tell if a window is energy efficient?
To determine if a window is energy efficient, look for the ENERGY STAR® certification or check the NFRC (National Fenestration Rating Council) label. Key ratings to review include U-factor, which measures insulation, and Solar Heat Gain Coefficient (SHGC), which indicates how well the window blocks heat. Lower values for both mean better energy efficiency.
Check for the certification label on every window and patio door you purchase. These ratings help you assess and compare the energy performance of similar products. If a product lacks this label, it means the NFRC has not verified its energy efficiency claims.
How do energy-efficient windows function?
Manufacturers seeking ENERGY STAR certification for windows or doors must pass an independent performance test designed by the non-profit National Fenestration Rating Council (NFRC). This evaluation rates the energy efficiency of a window using five essential factors.
How much money do these windows save you on your energy bills?
What are the benefits of installing energy efficient windows in your home?
Do they increase the value of your home?
According to energystar.gov, installing ENERGY STAR certified windows can result in an average annual savings of 12% on energy bills.
Absolutely! Not only can replacing and upgrading windows help reduce your energy bills, but it can also significantly enhance your home's value. While window replacement might not be the most eye-catching home improvement, it undeniably contributes to your home’s equity.
