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FAQs

What is the best way to compare windows?

There is only one reliable way to compare windows and that is by asking for the NFRC* rating for each window that you are considering. NFRC labels are independently certified and rate the whole window performance by U-Factor and Solar Heat Gain Coefficient (SHGC). The lower these ratings are the better the window will perform. The priority of U-Factor versus SHGC depends on your climate. You should ignore all the sales hype and choose the best NFRC ratings for your climate at the best cost.

What is an Energy Star window?

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Energy Star is a window certification program administered by the Federal Government to help you select energy efficient windows optimized for your climate. A window must meet minimum performance criteria to qualify. These criteria are based on NFRC whole window performance ratings and are different for each of four climate zones as follows:

New Version 6.0 Criteria Effective as of January 1, 2016
Northern Zone (blue): U-Factor of .27 or less, SHGC any
North Central Zone (yellow): U-Factor of .30 or less, SHGC of .40 or less
South Central Zone (orange): U-Factor of .30 or less, SHGC of .25 or less
Southern Zone (red): U-Factor of .40 or less, SHGC of .25 or less

Does The Window Source have Energy Star windows and doors?

Yes, any window or patio door ordered with a LowE glass upgrade will qualify for the Energy Star guidelines for the climate zone where purchased. This guarantee always comes in writing on your contract specifications so you will be assured of ordering and receiving the best LowE glass that is optimized for your particular climate zone.

Are tax credits available for windows and doors?

Tax credits may be available for Energy Star windows and doors installed in a taxpayer’s primary residence between January 1, 2012 and December 31, 2014. You may be eligible to receive a 10% federal tax credit up to $200 for windows and $500 for doors that meet Energy Star guidelines. There is a total limit of $500 in credits for a homeowner.

How can The Window Source be so much more affordable than other companies?

The Window Source provides you with extremely affordable prices on premium vinyl windows because of our large national buying power. Also our low prices and easy purchasing process allows us to be extremely efficient and pass the savings along to you.

Is the installation as important as the window?

Yes, a window needs to be properly measured to fit the opening and allow adequate tolerance for plumbing and squaring the new window. If the new window is not properly plumbed and squared it will not seal and operate properly no matter how good the quality of the new window.

How does The Window Source assure me of a great job at an unbeatable price?

Every Window Source job comes with a Limited Lifetime Warranty and Labor Warranty. Every window is delivered with an NFRC independently certified label and will qualify for Energy Star for your climate zone if ordered with the LowE glass upgrade. You will also receive a written best price guarantee at participating locations.

See What Our Customers Are Saying About Us

“The company to use if your needing window replacement, Fair pricing and honest fast work.”

Tom Reavis, GA

“Fantastic Company and true to their word! The crew was so professional and polite. We had our entire house of windows done and it only took 2 days. The quality of these windows are amazing and we couldn’t be happier! Don’t pay the high price that other companies want. This is the real deal!”

Jennifer Rochester, NH

“The Window Source of Tulsa was recommended to us. We received bids from three window replacement companies. Window source had the best product at the best price. The installation was on time and professional. We were kept informed through out the process. We are very pleased with the final product. About two weeks after the windows were installed I broke the outside pane of one window while mowing the yard. I contacted Window Source and told them what had happened, offering to pay for the replacement. They replaced the window free of charge. They are a pleasure to do business with.”

Alan McIntyre, OK

“Excellent service, product, and less than half the price of the other 2 estimates I had. Installer cleaned up after himself and was very professional.”

Ian Gollahon, OK

“Quality windows at an affordable price. Love our windows! Talked to several companies, but The Window Source offered top notch windows at the best price. Sales and installation crew were very nice, knowledgable and professional. They did a great job.”

M Kinser, OK