ILC 2015 - final report Jacob C. Jonsson Windows and Envelope Materials Group Building Technology and Urban Systems Division

Participants 48 boxes sent out, mostly US but also Jordan, South Africa, Indonesia, China, Singapore, India, Belgium, Germany, Brazil, Australia, Netherlands, Japan, Korea, France, and Sweden Only 20 sets of result at the deadline in January slowed down analysis Report is ready to share in time for the fall meeting

The hardest measurement Reflectance of low-e coatings is important and shows a few different errors New this year was grating alignment error Storing all lessons learned

Overview – monolithic glass Dashed lines are the absolute ±0.01 tolerance Dotted marks two stdevs

Overview - reflective coating Dashed lines are the absolute ±0.02 tolerance Dotted marks two stdevs

Emissivity of Low-e coating Dashed lines are the absolute ±0.02 tolerance Dotted marks two stdevs

Conclusion and next steps Fewer problems than in 2011 Make report available for NFRC members, possibly in the same place as this presentation Publish as LBNL report Start thinking about ILC 2019