Q: I have single-pane windows and I’ve heard that replacing them will help lower my energy bills. Can you explain how?
The last thing that any homeowner wants to do is pay outrageous prices to keep their home warm in the winter and cool in the summer. You already know that energy-efficient windows  can help lower your utility bills and keep your home toasty, but how exactly do windows save homeowners money?
We’re glad that you asked. The anatomy of an energy efficient window plays a large role in performance, and is directly related to how much money you can save on your utility bills. In fact, if you choose energy efficient windows that are certified by Energy Star, you can actually save hundreds of dollars per year on your utility bills.
Understanding the Components of Energy Efficient Windows
Energy-efficient windows function and perform differently than bargain windows that you’ll find from home improvement stores. These windows are mostly mass-produced and don’t contain many of the energy-saving components that are needed to lower utility bills.
When you invest in high-quality windows, they are custom-made to fit the specifications of your home—which helps create an airtight seal during installation. This is one of the keys to how energy-efficient windows help lower your utility bills, whether it’s in the middle of the frigid New England winter or dog days of summer.
The glass package of energy-efficient replacement windows is essentially the secret sauce behind energy savings.
There are generally two options for glass with residential replacement windows: dual pane and triple pane. Single pane isn’t really an option for residential windows anymore, as they don’t have much to offer in terms of efficiency.
Dual and Triple Pane Windows Cut Energy Bills
Dual-pane is essentially the industry standard for home windows. Dual pane windows  are engineered with two panes of glass with a space in the middle; this is where energy-efficient gases are inserted during the manufacturing process.
For the triple pane, there are three panes of glass instead of two. This provides two chambers to add energy-saving gases to and increases efficiency.
Don’t Forget About Argon, Krypton, and Low-E
The two gases that are responsible for energy savings are argon and krypton. Both of these gases are denser and slower moving than air and they help eliminate heat transfer across the window. Both of these gases are excellent insulators and help increase the R-value of the window.
Furthermore, low-e (low emissivity) glazing helps block the sun’s rays keeping your home cooler in the summer. This special transparent coating minimizes the ultraviolet and infrared light that can pass through the glass without compromising the visible light that is transmitted.
Minimizing Air Infiltration is Critical
Poorly designed windows can leak air in many places. Industry-leading windows excel in minimizing air infiltration by incorporating state-of-the-art sill and sash design in addition to premium weatherstripping. Creating an airtight seal can help eliminate air leakage. Air infiltration is a very important factor in the overall efficiency of the window.
As always, we hope you found this information helpful! If you have any questions about your windows or want more information on ways to save money on your utility bills, contact Stephanie Vanderbilt at firstname.lastname@example.org  or by calling 978-304-0495 .