of home heat gain or loss can be tied to windows
ENERGY STAR's 2024 window messaging says windows are about 8% of a home's exterior surface but account for about 45% of heat gain or loss.
Source: ENERGY STAR Certified Windows Key Messages, 2024.
Last Updated July 8, 2026
Window Treatment Statistics for Homeowners and Designers
Current statistics on window treatments, shades, energy savings, renovation demand, heat comfort, and household spending.
Fact Sheet
Numbers worth quoting, with the source beside each one.
Use this page as a quick reference for articles, buying guides, home design reporting, and homeowner education. Each statistic includes the publication date or access date so readers can judge how current it is.
average heating and cooling bill savings from ENERGY STAR certified windows
ENERGY STAR reports average nationwide savings of up to 13% on heating and cooling costs compared with non-certified products.
Source: ENERGY STAR Residential Windows, Doors, and Skylights, accessed July 2026.
annual HVAC energy savings from efficient window attachments
A U.S. Department of Energy fact sheet says window attachments can save 15% of household annual HVAC energy use compared with vinyl blinds.
Source: U.S. Department of Energy, Interior Cellular Shades Boost Home Energy Performance, 2021.
cooling savings in a lab-home comparison
In DOE-cited PNNL lab-home testing, cellular shades kept down outperformed vinyl venetian blinds with 13.3% cooling savings.
Source: U.S. Department of Energy, Window Treatments: The Undervalued, Highly Efficient Energy-Efficiency Measure, 2019.
heating savings in the same lab-home comparison
The same DOE-cited test reported 9.3% heating savings when cellular shades were kept down compared with vinyl venetian blinds.
Source: U.S. Department of Energy, Window Treatments: The Undervalued, Highly Efficient Energy-Efficiency Measure, 2019.
unwanted solar heat reduction through windows from cellular shades
A DOE/PNNL window attachments presentation says cellular shades can reduce unwanted solar heat through windows by up to 80%, bringing total solar gain to 15% or less.
Source: U.S. Department of Energy, Building America Window Attachments Webinar, 2015.
heating energy reduction shown in ORNL cellular shade studies
DOE reported that Oak Ridge National Laboratory studies showed cellular shades could reduce heating energy needs by almost 25%.
Source: U.S. Department of Energy, Minnesota Cellular Window Shades Recognition, 2023.
U.S. households reported being uncomfortably hot for 24 hours or more
The U.S. Census Bureau said about 10% of 133.2 million households reported this problem at least once in the previous year.
Source: U.S. Census Bureau, 2023 American Housing Survey analysis, 2025.
annual U.S. remodeling market level after the pandemic surge
Harvard's Joint Center for Housing Studies says the U.S. remodeling market remains above $600 billion and about 50% above pre-pandemic levels.
Source: Joint Center for Housing Studies of Harvard University, Improving America's Housing 2025, 2025.
of home improvement spending went to replacement projects
Harvard JCHS reported that replacement projects such as roofing, windows, and HVAC accounted for 49% of improvement expenditures in 2023.
Source: Joint Center for Housing Studies of Harvard University, 2025.
of homeowners planned renovation projects in 2026
Houzz reported that half of homeowners planned to renovate in 2026, while 41% planned decorating projects.
Source: 2026 U.S. Houzz & Home Study: Renovation Trends, 2026.
12-month CPI increase for window coverings
The Bureau of Labor Statistics' May 2026 CPI table listed window coverings with a 5.4% unadjusted 12-month change.
Source: U.S. Bureau of Labor Statistics, CPI-U detailed expenditure table, May 2026.
What The Data Shows
Window treatments are doing more than finishing a room.
The research points to the same practical pattern homeowners feel every day: windows affect comfort, energy use, privacy, glare, and renovation value. That is why the right treatment needs to be chosen for the room, the climate, and the way the home is actually used.
Methodology
How this page is maintained.
This fact sheet uses public data from government agencies, energy-efficiency programs, housing research groups, and homeowner studies. The page is refreshed when major sources publish new figures or when older links need replacing.
Cite this page
Lionheart Design Atlanta. "Window Treatment Statistics for Homeowners and Designers." Last updated July 8, 2026. https://lionheartdesignatl.co/window-treatment-statistics
Primary sources used
- U.S. Department of Energy and ENERGY STAR window-efficiency resources.
- Attachments Energy Rating Council and DOE window-attachment research.
- U.S. Census Bureau American Housing Survey analysis.
- Harvard Joint Center for Housing Studies remodeling research.
- Houzz homeowner renovation studies and Bureau of Labor Statistics price data.