Internorm KF 410
Internorm’s uPVC window, also available with an external aluminium shell. Uw as low as 0.62 W/m²K. Made at Sarleinsbach and Traun, Austria.
Carbon and evidence
Product Evidence
Evidence currently held for the Internorm product record.
Recorded Carbon Result
No quantified carbon result held
Request a current product EPD or manufacturer carbon declaration.
Environmental Product Declaration
EPD recorded- Coverage
- Coverage not confirmed
- Declared unit
- 1 m² of window surface area on a reference single-sash tilt-and-turn PVC-U window 1.23 m × 1.48 m — see conflict note
- Programme
- Institut Bauen und Umwelt e.V. (IBU)
- Registration
- EPD-QKE-20220156-IBG1-EN
- Standard
- EN 15804+A2
- Valid until
- 2027-09-14
- Verification
- Third-party verified
The applicable industry declaration states triple glazing in its declared unit but double glazing in its results tables, so no carbon figure is held for this window until that is resolved.
Evidence Gaps
- •EPD product coverage is not confirmed.
- •No quantified carbon result is recorded.
- •No product-specific circularity or material-health claims are recorded.
Design & Specification Notes
Qualitative notes for early design discussion. Not product-specific EPD evidence, and not a basis for numerical comparison.
Internorm’s uPVC window, also available with an external aluminium shell.
Typical Uses
- •Glazing systems
- •Daylight openings
- •Thermal envelope
Key Performance
Supports daylight and thermal performance of the envelope.
Typical Service-Life Estimate
30 yearsGeneric estimate for early design discussion; confirm with the manufacturer.
Specification Actions
- •Verify glazing U-values meet or exceed building regs.
- •Consider specifying higher recycled glass content.
- •Confirm the current EPD covers the selected product, finish and manufacturing route.
Indicative Health & Indoor Air
Specification
- Finish
- uPVC / uPVC-aluminium window
- Thermal
- Uw as low as 0.62 W/m²K