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Energy Efficient Windows

At Renewal by Andersen Charlotte, we believe in enhancing your home with our Acclaim™ replacement windows. Energy-efficient windows significantly lower your energy usage, resulting in reduced utility costs and improved year-round comfort.

Charlotte’s moderate climate, characterized by all four seasons and recent years of minimal snowfall, necessitates tightly sealed windows to combat summer winds and winter precipitation. Investing in high-quality windows guards against drafts and leaks, ensuring a more comfortable and efficient home.

Update or Replace Existing Windows

When considering whether to update or replace your existing windows, it’s important to evaluate the condition and performance of your current windows. If your windows are relatively new and in good condition, updating them with weatherstripping or caulking might be sufficient to improve their energy efficiency. However, if your windows are old, drafty, or showing signs of wear such as rotting frames or condensation between panes, replacing them may be the more effective solution.

At Renewal by Andersen Charlotte, we offer comprehensive solutions for window replacement, ensuring you get the best performance and value for your investment. Our experts can guide you through the process, from selecting the right materials to professional installation, designed for Charlotte’s climate.

Window Frames

The choice of window frame material greatly influences your home’s comfort and functionality. While wood is an excellent insulator, it requires regular maintenance and is more expensive. Aluminum, though popular, also demands upkeep and doesn’t insulate as well.

Renewal by Andersen offers Fibrex® material for our Acclaim™ windows. This exclusive composite combines the strength and insulating value of wood with the low maintenance benefits of vinyl. Fibrex® material never requires painting and resists cracking, pitting, corrosion, and rotting, providing twice the strength of vinyl.

Energy-Efficient Glass

The glass in your windows plays a pivotal role in energy efficiency. Double- or triple-pane windows significantly improve insulation. Renewal by Andersen’s High-Performance™ Low-E4® glass exceeds standard dual-pane glass efficiency by 47% in winter and 56% in summer. For even greater efficiency, our High-Performance Low-E4® SmartSun™ glass improves energy efficiency by 70% in summer and 49% in winter compared to standard dual-pane glass.

Operating Types

How your windows open can impact your home’s energy efficiency. Acclaim™ awning and casement windows allow you to direct airflow, cooling your home with fresh air. Sliding and double-hung windows offer flexible ventilation options, while fixed windows, like picture and specialty windows, provide a sealed solution that eliminates drafts and leaks.


Proper installation is critical to maximizing energy efficiency. Renewal by Andersen’s Certified Master Installers ensure each window is expertly sealed with continuous weatherstripping, tailored to Charlotte’s climate. Post-installation, our installers demonstrate the windows’ correct function, ensuring a perfect fit and long-lasting performance.

Confidence of ENERGY STAR® Rated Windows

ENERGY STAR® is a voluntary program through the U.S. Environmental Protection Agency (EPA) that helps businesses and individuals save money and protect our climate through superior energy efficiency. An ENERGY STAR® window means the government has certified that the product meets or exceeds energy performance standards in North Carolina. Replacing outdated windows with ENERGY STAR certified ones can reduce household energy bills by an average of 12% nationwide.

At Renewal by Andersen Charlotte, we offer a variety of ENERGY STAR® certified window options to meet your needs. Here are our top 5 most popular windows:

Renewal by Andersen Sustainability

At Renewal by Andersen, we are committed to sustainability and minimizing our environmental impact. Our Acclaim™ windows are made with Fibrex® material, which combines reclaimed wood fibers with durable polymers, reducing waste and enhancing energy efficiency.

We adhere to stringent manufacturing processes to ensure our products meet high environmental standards. Our focus on reducing our carbon footprint, recycling materials, and promoting energy efficiency underscores our commitment to a greener future.

Cost Savings

Investing in energy-efficient windows offers significant cost savings over time. Lower energy bills, reduced HVAC wear and tear, and increased property value are just a few of the benefits. Energy-efficient windows help maintain a consistent indoor temperature, reducing the need for constant heating and cooling adjustments. This not only lowers utility bills but also extends the lifespan of your heating and cooling systems.

Additionally, energy-efficient windows can improve the overall value of your home. Potential buyers recognize the benefits of lower energy costs and the comfort provided by well-insulated windows, making your property more attractive on the market.

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