Compare the Most Energy-Efficient Window Companies (2023 Review)

How Do the Most Energy-Efficient Window Replacement Companies Compare?

Do Energy-efficient Windows Save Money?

Energy-efficient windows are an excellent way to save money, with the U.S. Department of Energy reporting that windows are responsible for 25% to 30% of heat loss and heat gain in the home.

A lack of insulating glass, Low-E coating, and other energy performance features can significantly affect energy costs, making energy-efficient windows a good investment for many homeowners. ENERGY STAR estimates that replacing single-pane windows can save between $101 and $583 annually. Replacing double-pane windows with clear glass will save you an estimated $27 to $197 annually. These savings vary based on energy rates, local climate, and your home’s energy efficiency.

How Much Do the Top-Rated Energy-efficient Windows Cost?

While the average window may cost between $200 and $1,200, it’s not uncommon for energy-efficient windows to cost more because of the following factors:

• Frame material: Fiberglass and wood window frames are usually more expensive than aluminum or vinyl windows. As a result, companies like Window Nation, which primarily offer vinyl products, have less expensive prices compared to providers like Renewal by Andersen. But Renewal by Anderson has a much greater variety of frame materials.
• Energy efficiency features: Upgrading to energy-efficient windows costs more than a basic single-pane window because manufacturers use more material: glass, glazes, warm edge spacers, and gas fills. To ensure a higher price is justified, check the windows for ENERGY STAR certification and energy performance labels from the National Fenestration Rating Council (NFRC). This council independently rates a product’s energy performance based on the U-Factor, air leakage, visible transmittance, and solar heat gain coefficient.
• Window type and size: Like shopping for any product, the type, style, and size of the product affects its price. A double-hung window will cost around $450 to replace, but a larger casement window costs an average of $750.

Look at each provider’s average cost ranges to help you assess which company will best suit your needs.

What Types of Windows Do the Top-rated Energy-efficient Offer?

Window World offers by far the largest range of window styles, with Renewal by Andersen offering the second-best variety of residential window types.

Single-hung windows and glass block windows were two of the least common windows. We found that only Window World offered both of these window types.

See how these providers stack up against each other regarding product offerings.

Photo	Window type	Renewal by Andersen	Window World	Window Nation	Universal Windows Direct	Aeroseal Windows
	Glass block		✓	✓		✓
	Awning	✓	✓	✓	✓	✓
	Bay	✓	✓	✓	✓	✓
	Casement	✓	✓	✓	✓	✓
	Double-hung	✓	✓	✓	✓	✓
Source: Window World	Garden		✓	✓	✓	✓
	Picture	✓	✓	✓	✓	✓
	Single-hung	✓	✓			✓
	Sliding	✓	✓	✓	✓	✓
	Specialty	✓	✓	✓		✓

So, What Is the Best Energy-efficient Window Company for Your Home?

The EcoWatch Review team recommends Renewal by Andersen as the best window company because of its unique, energy-efficient Fibrex window material, the assortment of window styles, and ENERGY STAR-certified windows.

But before you decide, gather quotes from multiple window companies to budget appropriately and get the best high-performance windows for your home. If you’re unsure which home windows best suit your needs, speak with a company representative for more details about energy efficiency features and customization options.

Best Availability

4.5/5

Great industry reputationAward-winning companyMember of US Green Building Council

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Best for Residential Windows

4/5

Wide variety of products and servicesCustom DesignsManufactures products in-house

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Window Veteran

4.5/5

EnergyStar PartnerLarge service areaGreat industry reputation (BBB A rating)

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Methodology: How We Rank Energy-Efficient Window Companies

EcoWatch reviews differ from most websites, as we’re examining these companies through a sustainability lens. We’ve reviewed the best window installers primarily based on energy efficiency, as it’s what’s best for the environment and for you as a homeowner. Energy-efficient windows have been shown to lower energy bills by hundreds of dollars.

Along with energy efficiency, our rating methodology is based on the following factors:

Service Area

This one is pretty self-explanatory, but we’ve chosen to highlight window installation companies that serve a wide variety of states and cities so you can find a quality energy-efficient window installation company near you.

Quality of Services

We’re willing to bet that you’re not looking for a company to do a shoddy job installing windows. We’ve vetted each company featured on this list to ensure its technicians are well-qualified and the company has received tons of positive customer feedback to vouch for its service.

Cost

As with most services, cheap window installers will not provide the highest quality service, so this one is a give-and-take. However, we want to highlight energy-efficient window providers that offer a wide range of price and financing options so they’re accessible to most homeowners.

Warranty

Energy-efficient windows are a sizable investment, so you’ll want to ensure that investment is well protected. Window installation companies that offer lengthy warranties for products, parts, and installation (aka workmanship) rank higher with EcoWatch.

Customer Satisfaction

Another self-explanatory yet incredibly important review factor is customer feedback. If most customers don’t have nice things to say about their experience with a certain window installation company, you won’t see it featured on EcoWatch.

Years of Experience

Last but not least, we like to see companies that have a proven track record in the industry. Window providers with more experience will earn higher rankings by our standards. We like to see at least ten years of experience.