The Passive House Bar
Passive House projects typically require certified window U-Factors around 0.80 W/(m²·K) or better for the installed assembly—plus careful attention to solar heat gain, airtightness, and condensation resistance.
Assembly Performance, Not Just Glass
Certification is based on the complete installed unit: frame, glazing, spacer, and installation details. A thermally broken frame with a warm-edge triple-glazed package is the foundation; meticulous installation is what realizes the rated performance.
Key Specification Points
- Certified U-Factor for the full assembly, with psi-values for the install detail
- SHGC chosen for the project’s heating and cooling balance
- Condensation resistance (temperature factor) for cold climates
- Airtight installation with taped or sealed perimeter details
VITRIUS triple-glazed systems—from the 80 Series Fixed at an NFRC U-Factor of 0.213 to the 127 Series Casement at 0.274—give design teams performance-oriented options with slim profiles. Confirm project suitability against the selected certification standard and current product report.