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Energy Efficient Replacement Windows

Energy-efficient replacement windows

What are Energy Efficient Windows?

Energy-efficient windows are made using quality materials and technology to help make your home more comfortable, lower heating and cooling costs, and lessen your impact on the environment. Depending on the climate that you live in, there are specific enhancements that can be made to the windows to improve energy efficiency. Options like multiple panes of glass, insulating gases, low-emissivity coatings, special spacers and seals can all contribute to increasing energy efficiency in your home's windows.

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The US Environmental Protection Agency developed a program called ENERGY STAR® to provide credible, unbiased information that consumers can use to make educated decisions around products that save energy and help reduce the carbon footprint on the environment. Energy-efficient windows can help make your home more comfortable and may reduce your utility bills. Plus, you’ll have the added knowledge that you’re helping the planet by minimizing environmental impact.

​​Energy 101

Discover everything you need to know about energy efficiency, ENERGY STAR ratings and the different options available for glass and glazing. Stanek Windows offers a variety of vinyl window and patio door options that help you achieve long-term performance and energy cost savings, in any climate.

Energy Efficiency Basics

What is U-Factor and what number should I look for in replacement windows?

What is SHGC and what numbers should I look for in replacement windows?

What else can you do to make your home more energy efficient?

​​Energy Star

How often does ENERGY STAR change the guidelines?

What does it mean to be an ENERGY STAR-certified window or door?

​​Glass & Glazing

What is Low-E coating and how does it help make windows and doors more efficient?

Why should Ultraviolet light and infrared light be minimized?

What is the difference between single-pane, double-pane and triple-pane windows?

How heat transfers through different types of glass units (single-pane, double-pane and triple-pane)

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High Performance Windows & Patio Doors

Thinking about new energy efficient replacement windows for your home? Stanek vinyl replacement windows are more durable and stronger than typical vinyl replacement windows. Stanek vinyl windows are affordable, easy to care for, energy efficient, and are available in high-quality styles, colors and options to fit your budget.

Double-Hung Windows

Double-Hung Windows Learn More

Sliding Windows

Sliding Window Learn More

Awning & Casement Windows

Awning Windows Learn More

Bow & Bay Windows

Bay Window Learn More

Custom Shape Windows

Custom Shape Windows Learn More

Patio Doors

Custom Shape Windows Learn More
Window BuyingResource Center

Our downloadable resources provide helpful, educational information to aid your window buying process. Download helpful tips on how to purchase windows and discover who makes the best windows for your investment. Want to compare window companies? Download our window comparison chart or our FREE checklist.

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Window Buying Resources