When installing any storm window, there is a slight risk of condensation developing between the existing window and the storm window. More information on interior-mounted storm panels be can found at DOE's Building America Solution Center. Outward-swinging windows require interior storm windows. We’ll focus on exterior storm windows, which fit on all standard double-hung windows and are the most common type installed by homeowners. All storm windows will make your home more energy-efficient, but you can choose between different materials and coatings, and whether you want to install them on the exterior or interior of the home. Look for storm windows that have the Energy Star label.Īfter deciding to install a storm window, your first step will be to choose which type is right for your home.

Information on energy performance is available for all rated products through the Attachment Energy Rating Council (AERC).

This equates to $100–$300 in annual savings, assuming a $1,000 annual heating/cooling bill. On average, low-e storm windows can save you 10%–30% in heating and cooling costs. This coating improves the window’s insulation ability, in turn lowering your heating and cooling costs. In fact, installing a low-emissivity (low-e) storm window over a single pane window can lower your utility bill just as much as replacing the window with a new energy code-level window.Ĭoated with an ultra-thin, virtually invisible layer of metal, low-e windows reflect infrared heat back into the home. They’re easy to install and cost a fraction of replacement windows. Storm window installation is one of the most cost-effective solutions for upgrading energy inefficient existing windows.

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