Lightweight Secondary Windows
Compared to window replacements, secondary windows are a cost-effective and efficient way to improve thermal performance and occupant comfort and reduce noise.
Researchers from the National Renewable Energy Laboratory found 15% average whole-building savings compared to single-pane windows. View full-size infographic. [PDF - 323 KB]
Reference above to any specific commercial product, process or service does not constitute or imply its endorsement, recommendation or favoring by the United States Government or any agency thereof.
- Report: Secondary Glazing System (SGS) Thermal, Moisture, and Solar Performance Analysis and Validation (LBNL for NEEA, 09-2020)
- Presentation: Enhancing Window Performance with Energy Efficient Attachments (AERC, 05-2020)
- Presentation: Secondary Windows Products (NEEA, 2020)
- Product Search: Secondary Windows that Meet AERC Standards (AERC)