Replacing your windows is a key opportunity to improve energy efficiency. Inefficient or outdated windows — those with leaks, cracks, or deteriorating seals — let outside air in and inside air out, which means your HVAC system has to work harder to keep your home at a comfortable temperature.
Energy-efficient windows aim to minimize heat exchange and insulate your home against outdoor temperatures, helping you stay comfortable without running your heater or air conditioner nonstop. This efficiency can provide significant long-term cost savings by lowering your energy bills, making replacing your windows a smart investment.
If you’re considering replacing your windows, keep reading to learn more about how window energy ratings work, different efficiency-boosting features to take advantage of, and how opting for energy-efficient windows can save you money in the long run.
Understanding Window Energy Ratings
First, let’s go over how energy ratings work for windows. ENERGY STAR is an EPA program that sets energy-efficiency standards for a variety of home products, including windows. To earn ENERGY STAR certification, windows must meet their efficiency standards in several different areas, including:
- U-factor: This measures the effectiveness of a window’s insulation. The lower the U-factor, the better.
- Solar heat gain coefficient (SHGC): This measures the amount of solar radiation that can pass through a window. Windows with a higher SHGC rating may be beneficial in especially cold climates, but in general, those with low ratings are considered more energy-efficient.
- Visible transmittance (VT): This measures the amount of visible light that can pass through the glass. The higher the rating, the more light, which can lead to solar heat gain.
- Air leakage (AL): This tells you how many cubic feet of air can pass through a window per minute, divided by the window’s total area.
It’s important to note that ENERGY STAR certification is awarded based on region — what meets standards in Texas may not meet the standards for Utah. Always check the label to make sure your region is indicated or use ENERGY STAR’s online product finder to verify.
Glass Technologies That Improve Efficiency
Glass technology has come a long way in recent years. When you’re replacing your windows, consider double- or triple-paned glass. Also known as an insulated glass unit, they contain argon or krypton gas between panes, creating an insulative barrier that blocks thermal heat from passing through.
Low-E (low-emissivity) coatings reflect heat while still allowing light to pass through. This means heat stays indoors during the winter and outdoors during the summer, all without sacrificing natural light exposure. Low-E coatings also reflect the sun’s UV rays, protecting your health and your belongings.
Frame Materials and Their Impact on Efficiency
The type of glass isn’t the only thing that impacts a window’s efficiency. When replacing your windows, it’s important to make sure you choose the right frames, as well.
- Vinyl frames offer excellent insulation — plus, they’re affordable and low-maintenance.
- Fiberglass frames are strong, durable, and offer great thermal performance.
- Wood frames require more maintenance than other materials, but high-quality wood can offer superior insulation.
- Aluminum frames offer a modern look, but have high conductivity. To improve insulation, thermal breaks can be incorporated between the interior and exterior sections of the frame.
Window Design and Style Considerations
A window’s design and style can impact its energy efficiency, as well. For example, fixed windows — those that can’t open — can achieve a tighter seal than operable windows, which means they’re more energy-efficient. If you want windows that can open, consider casement windows. Because they don’t need a track to slide on, they have a tighter seal that doesn’t let as much air leak through.
The Role of Proper Installation
Even the best windows can’t help your home be more energy-efficient if they’re not properly installed. Improper installation can leave gaps along the edges of the frames, letting in drafts. This is why it’s so important to work with experienced installers who can achieve a perfect seal and ensure your home is insulated against outdoor temperatures.
Upfront Cost vs. Long-Term Savings
The upfront costs of replacing your windows with more energy-efficient models may be higher than opting for standard windows; however, it can actually save you money in the long run. By properly insulating your home, you can lower your energy bills. Plus, many states offer rebates, tax credits, and other incentives for making energy-efficient upgrades.
Replacing Your Windows with Creekside
At Creekside Windows and Glass, we’re committed to helping you improve your home’s energy efficiency with top-of-the-line replacement windows. If you’re thinking about replacing your windows, contact us today to schedule a free estimate.
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