Highly insulating windowsToday's highly insulating windows are constructed with components that significantly increase the resistance to heat loss through the window, resistance to condensation, and providing increased occupant comfort compared to typical double-pane products. This is accomplished with a combination of additional panes of glass with inert gas fill between the panes, low-emissivity (low-E) coatings on the glass surfaces, more insulating spacers, and advanced frame materials. and low-e storm windows may be identified from qualified vendors through this website. The windows products listed for sale have all met the specifications and requirements of the U.S. Department of Energy's High Performance Windows Volume Purchase Program and are available for new and retrofit construction in residential and commercial buildings.

Finding and buying highly insulating windows from a choice of multiple vendors is now easier than ever using this website.

Purchasing Windows Products

A buyer interested in purchasing a minimum quantityMinimum order quantity is 20 total windows., 20 low-E storm windows, or 1 patio door. Some vendors will sell less than the minimum order. of windows can identify vendors offering the desired window types at the listed prices using the ”Search for Windows” feature To locate these vendors, follow the steps below using the window selection menus. If you do not know a feature of the search criteria, use the default value (“Any or “All”)

1. Select the desired Window TypeSingle Hung, Double Hung, Casement, Slider, Awning, Tilt and Turn, Fixed, Patio Door, Low-E Storm.
2. Select the Construction TypeNew or Retrofit.
3. Select the desired window or door size—by United Inches (UI)United Inches (UI) = length + width or door size.
4. Select the Structural ClassResidential or Commercial of the window.
5. Select the desired Performance GradePerformance Grades range from 25 to 100 and is equivalent to the design wind pressure for components and cladding based on wind speed, wind exposure and building occupancy., if known.
6. Select the Shipping RegionState or Province where you wish to have the windows delivered or where you wish to pick up the windows.
7. Click the ”Submit Search” button.

A list of vendors offering the windows you selected and who deliver to the desired location will be shown. The base price per window offered by those vendors is also shown. The price per window from each vendor is based on the total quantity of windows selected. You may then click through to the vendors' website to place an order.

Buyers should be aware that the base price shown for the windows does not include applicable taxes, delivery, installation, or other custom features such as grids or alternative frame colors.

Buyers may alternatively choose to fill out and submit an Optional Open Bid Request Form to obtain bides from multiple vendors for desired window products. This form may be particularly useful for buyers—such as public agencies—who require soliciting bids.

About the Windows Volume Purchase Program

The windows volume purchase program is supported by the U.S. Department of Energy (DOE) Building Technologies Program in partnership with the Pacific Northwest National Laboratory., Energetics, Inc., the Efficient Windows Collaborative, and Lawrence Berkeley Laboratory. The goal of the program is to expand the market for highly insulating windows and low-e storm windows by reducing market barriers and offering windows products at attractive prices; thus making highly insulating windows more affordable.

Top Selling Manufacturers

Please note that hyperlinks to vendor websites are provided only as a convenience and do not imply an endorsement of such website, entity, product, or service. Any access, use or engagement of, or other dealings with such website, entity, product, or service shall be solely at the user's own risk.