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The DOE's Net-Zero Buildings Roadmap Includes Window Film — Here Is What That Means for Your Property

Mar 16th 2026

Source: U.S. Department of Energy / National Renewable Energy Laboratory. (2022). Pathway to Zero Energy Windows (NREL/TP-5500-80171). Public domain.

Buildings Account for 40% of U.S. Energy Consumption. Windows Are a Primary Loss Point.

The U.S. Department of Energy's 2022 Pathway to Zero Energy Windows report opens with a fact that should concern every building owner in America: buildings account for approximately 40 percent of total U.S. energy consumption, and windows are among the largest contributors to that energy loss.[4]

The DOE's response is the Pathway to Zero Energy Windows — a research and development roadmap that identifies the technologies needed to transform windows from energy liabilities into energy-neutral building components. Window film is explicitly identified as a key near-term retrofit technology on the path to net-zero energy buildings.

What "Zero Energy Windows" Means and Why Window Film Is Part of the Solution

The DOE's 2022 report identifies applied window films as representing a "significant near-term opportunity for energy savings in existing buildings."[4] The United States has approximately 2.8 billion square meters of window area in existing buildings. Replacing all of those windows with high-performance glazing would cost trillions of dollars and take decades. Retrofitting them with window film can be done at a fraction of the cost, in a fraction of the time, with documented energy savings that begin on the day of installation.

The DOE's R&D Priorities: Where Window Film Technology Is Heading

TechnologyStatusDOE Priority
Spectrally-selective solar control filmsCommercially available nowNear-term deployment
Low-emissivity (Low-E) retrofit filmsCommercially available nowNear-term deployment
Dynamic/electrochromic filmsEmergingMedium-term R&D
Thermochromic filmsResearch stageLong-term R&D

The first two categories — spectrally-selective solar control films and Low-E retrofit films — are available today from manufacturers like Saint-Gobain Solar Gard. The DOE's roadmap confirms these represent the most cost-effective near-term investment for building owners.

Carbon Emissions: The Environmental Case for Window Film

Buildings are responsible for approximately 30 percent of U.S. greenhouse gas emissions. By reducing cooling and heating loads on a building's HVAC system, window film directly reduces electricity consumption — and in most U.S. electricity grids, less electricity means fewer carbon emissions. For building owners pursuing LEED certification or ENERGY STAR building certification, window film is a documented, cost-effective strategy for improving building energy performance.

What This Means for Your Building Today

The DOE's roadmap confirms: window film is not a luxury upgrade — it is a foundational energy efficiency measure for any existing building with single-pane or older double-pane glazing.

The Window Place USA supplies the DOE-performance-class Solar Gard product line to commercial contractors, facility managers, and government agencies nationwide.

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Frequently Asked Questions

Is window film part of the DOE's net-zero buildings strategy?
Yes. The DOE's 2022 Pathway to Zero Energy Windows report (NREL/TP-5500-80171) explicitly identifies applied window films as a "significant near-term opportunity for energy savings in existing buildings."

Does window film reduce carbon emissions?
Yes. By reducing cooling and heating loads, window film reduces electricity and natural gas consumption, which directly reduces greenhouse gas emissions.

Can window film help achieve LEED or ENERGY STAR certification?
Window film can contribute to LEED credits in the Energy and Atmosphere category by improving the building's energy performance. Consult your LEED project administrator for specific credit eligibility.

[4] U.S. Department of Energy / NREL. (2022). Pathway to Zero Energy Windows (NREL/TP-5500-80171). Retrieved from https://docs.nrel.gov/docs/fy22osti/80171.pdf. U.S. Government work, public domain under 17 U.S.C. § 105.