Andersen replacement windows: the elite class of windows

Where to buy and what to know about Andersen replacement windows.

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Since its founding in 1903 by Danish immigrant Hans Andersen, the Andersen Corporation has grown into the United States’ largest window manufacturer, recognized for quality as well as energy efficiency.

Its windows have garnered Energy Star’s highest honor for energy efficiency and are the most popular replacement window replacement option.

To get more information about window replacement price estimates, see our main article on the cost of new panes here.

Yet its name remains somewhat unknown, at least grammatically. It’s often seen spelled as “Anderson replacement windows,” but there’s no “O” in Hans’ Andersen’s company name. Buying Anderson replacement windows instead of Andersen replacement windows is like buying a Folex over a Rolex. The real thing is certainly better.


Andersen has a wide national network of certified dealers. This includes locally owned shops and some big box stores, including any given Home Depot. If you’re hiring a professional installer, they’ll be able to track down the proper windows for you. If you plan a do-it-yourself installation, you can search for local shops on Andersen’s website.

If you searching for contractors to install Andersen windows, limited suppliers make internet-based services that match you with local contractors among the best methods to find the lowest price.


If you’re considering upgrading from vinyl windows to Andersen windows (avoid those “Anderson replacement windows”), note that this will take a bit more work than simply replacing the old window frames. Andersen windows come in a wide range of sizes. However, vinyl windows for new homes are made with very specific measurements to match a home. Expect new Andersen windows, or any other wood windows, to be slightly off these measurements. Therefore, a contractor will likely need to add shims or cut away the window openings to ensure a good fit. Without proper sizing, the window can be difficult to open.

In new homes, fitting is less of a concern because the house will be built to match the correct window sizing.


Andersen windows are widely considered the elite class of wood window frames. Composed of 2/5ths wood fibers and 3/5ths thermoplastic resin, they meet qualifications for Green Seal, Energy Star, and the Scientific Certification’s standards for indoor air quality.

In 2010, Andersen replacement windows was awarded the Energy Star Partner of the Year in the windows category. This honor recognizes Andersen as a leader in manufacturing practices and products that reduce greenhouse emissions as well as education of consumers about energy-efficient windows. Andersen won the same award in 1999, the inaugural year for Energy Star awards. Those “Anderson replacement windows” won no such award.

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