Lab Uw 0.8 does not equal site Uw 0.8. How Uw is calculated (Uf + Ug + psi), thermal bridge failures, and how to specify for real-world performance.
Uw 0.8 Passive House Windows: Why Most “Certified” Products Fail on Site
Lab Uw 0.8 does not equal site Uw 0.8. How Uw is calculated (Uf + Ug + psi), thermal bridge failures, and how to specify for real-world performance.