Industry PCRs and EPDs
GANA PCR for Flat Glass was published by NSF describing the requirements for LCAs and EPD of flat glass, valid through September 30, 2025.
NGA flat glass member companies (members of the NGA Forming committee) published an industry-average EPD for flat glass produced in the US in December 2019 (ref: ASTM-EPD121) valid until December 20, 2024.
The processed glass PCR Guidance for Building-Related Products and Services Part B: Processed Glass EPD Requirements was established August 17, 2016.
The Cradle-to-Gate Window Product Category Rule was established September 10, 2015 and is valid through September 30, 2021. This PCR is currently being updated to include fenestration products.
Triple Glazing and Embodied Energy
NGA’s energy code consultant, Tom Culp of Birch Point Consulting LLC answers the question- in a triple glazed insulating unit, is the embodied energy in the added third pane of glass paid back by the extra energy savings realized by the triple glazed unit? Read his analysis and conclusions.
- Recyclability of Architectural Glass (download from the NGA Store)
- General EPD Education (download from the NGA Store)
- NGA One-Pager Flat Glass Global Warming Potential (pdf)
- Flat Glass Industry Environmental Transparency Documents (download from the NGA Store)