High-performance windows mean more than increased energy efficiency. In addition to great insulation, a performance window can provide more light, sound control and eliminate condensation. Learn what makes a window ‘high performance’, why it matters, and the benefits.
Shopping for windows isn’t easy. Whether it’s replacement windows or windows for a new home or business, making the right decision is crucial. ENERGY STAR® certification helps determine a more energy-efficient window, but how do you choose the best one? Knowing the basics of certifications like these can help you make an informed decision.
Here’s how to ensure you’re making a good decision for your next window replacement.
What Are High-Performance Windows?
High-performance windows are energy-efficient windows that typically have a performance rating. This rating is based on its energy efficiency and overall performance. Asher exclusively uses Renewal by Andersen® windows, a leading high-performance replacement window brand.
High-performance windows are a popular choice in modern homes due to their:
- Airtight seals that improve insulation and eliminate condensation
- Low thermal expansion which extends the window’s longevity
- Treated glass that lets in more natural light and less heat
The purpose of these windows is to maximize thermal insulation, reduce outside noise and control solar heat.
Does Window Performance Really Matter?
Absolutely. Everyone needs to make their home’s temperature comfortable. Increased insulation and energy efficiency are common reasons people want to replace their old windows. Investing in a higher-performance window can offer peace of mind that you’re using a more energy-conscious, long-lasting solution to overcome these concerns.
Understanding Energy Star® Windows
ENERGY STAR® is a government-backed program that sets energy-efficiency criteria for windows and doors across the country’s various climate zones. To be ENERGY STAR® certified, a window E-rating must meet the U-Factor and SHGC requirements for your climate zone and be NFRC-labeled.
Most Renewal by Andersen® windows are certified for all U.S. climate zones.
What U-Value and R-Value Should I Look for in Replacement Windows?
You want to look for the highest R-value when choosing an energy-efficient replacement window. Well-insulated windows have an R-value of five or higher. A single pane window R-value is around one, and double pane windows range from three to three point eight. Windows with an R-value of 10 are at peak efficiency.
The U-value, or U-factor, tells you how much heat is lost through a window. Aim for a low U-value when choosing, as the lower the U-value, the better the window’s insulation.
Other Important Window Ratings
The following metrics are also important for people looking to find the best window for their climate and energy requirements:
- Solar Heat Gain Coefficient (SHGC): This indicates the amount of solar radiation that can pass through a window. The lower the SHGC, the less solar heat that passes through the window.
- Visible transmittance (VT): There’s just no substitute for natural lighting. A window’s VT rating indicates the amount of light that can pass through a window.
- Air Infiltration: Cold or warm air can leak through cracks, forcing your HVAC system to work harder to maintain a comfortable temperature. This rating tells you how much air can slip through a window.
These ratings are part of the National Fenestration Rating Council’s (NFRC) independent rating system for windows and doors.
Are Passive Windows and High-Performance Windows the Same Thing?
No. Passive house windows are a type of high-performance window characterized by a low U-factor and high R-value, which allows them to maximize heat gain and minimize heat loss. Passive window systems are designed to collect solar heat through south-facing windows and retain it in airtight layers of gas known as thermal mass.
Benefits of High-Efficiency Windows
Window replacement is one of the most rewarding home renovation projects you can take on. Today’s high-performance windows offer several benefits.
Save Money On Utility Costs
The U.S. Department of Energy states that high-efficiency windows can save people up to 15 percent on utility bills. It can also reduce the workload of your HVAC system, requiring less maintenance in the long run.
The Sustainability Factor
In addition to reducing a home’s energy use, the production cycle of high-performance windows provides a number of environmental benefits over past materials. Renewal by Andersen® exclusively uses Fibrex® composite materials for its frames, which are a blend of recycled wood fiber and polymer.
This material is better insulated than aluminum and more durable than vinyl, making it a sustainable, modern choice.
Improved Comfort In Your Home
High-efficiency windows are designed to keep your home cooler in summer and warmer in winter through advanced glazing techniques. This means you can block solar heat without blocking any light, protecting your family from UV rays. Other surprising home comfort benefits include:
- Cutting off outside noise for more peace and quiet
- Eliminating cold drafts, leaks and condensation
- Less furniture degradation due to UV ray protection
A more comfortable home setting makes your space more inviting for guests and family members.
Long-Lasting Windows
Window replacement can be expensive and time-consuming. Depending on the time of year you choose to renovate, you may be losing a lot of heat or cool air during the installation. If you decide to install high-performance windows, you may not need to replace them for 25 years or longer with proper maintenance.
Longevity is one of the many factors that make installing new windows a no-brainer. While window replacement costs vary, they provide a strong return on your investment.
Tips to Choose High-Performance Windows for Your Home
Be sure to look for climate-centric features for your area. You can learn about the energy efficiency requirements that ENERGY STAR® applies in your area by entering your ZIP code on their website. Once you know your area standard, start paying attention to the various energy ratings while you shop.
If you know what ratings you require and what window elements you need, create a checklist to share with your window replacement experts. This could include:
- ENERGY STAR® requirements: Make a note of the climate-specific energy efficiency standards for your ZIP code and make sure this is a priority when exploring quotes.
- Energy ratings: Have some general idea about the U-factor, SHGC and VT values so you don’t feel overwhelmed.
- Window elements: Ask for more information with your window experts on glazing, gas fills and low-emissivity (low-e) coatings.
- Frame materials: Research options like vinyl, fiberglass, wood and aluminum for durability and insulation.
- Assess installation expertise: Ensure your chosen window replacement experts are certified and experienced.
These final steps can help you to really zero in on which choice you discuss with your expert provider.
Explore Our Selection
At Asher, we only sell the highest quality windows on the market. Browse our selection of Renewal by Andersen® windows to experience the benefits of the highest-rated windows for homes. You will love the way your home looks through high-performance windows, and your bank account will love the difference, too.
