Kvillsfors Side-Hinged Window, Alu-Clad + ORAÉ
The opening version of the Kvillsfors window — side-hinged, inward opening, with a secondary sash — in the same alu-clad timber construction with ORAÉ reduced-carbon glass. More frame, more hardware and a second sash put its declared production carbon at 79.9 kgCO2e per reference window against 50.0 for the fixed light: openability costs roughly 60% more carbon, which is a real argument for fixing every light that does not actually need to open.
Carbon and evidence
Product Evidence
Evidence currently held for the NorDan product record.
Recorded Carbon Result
A1–A3 GWP-total for one 1.23 × 1.48 m reference window (116 fossil less 36 biogenic held in the timber frame). Not comparable per-m² with curtain walling — window EPDs declare per piece. The use stage matters here: declared B2 maintenance adds +35.7 kgCO2e over the 60-year life.
Indicator: GWP-total
A1–A3 covers raw-material supply, transport to manufacture and manufacturing. It is product-stage information, not a whole-life result.
Environmental Product Declaration
EPD recorded- Coverage
- Specific product
- Declared unit
- 1 window, 1.23 m × 1.48 m (EN 14351-1 reference size), 60-year service life
- Programme
- EPD Norge (The Norwegian EPD Foundation)
- Registration
- NEPD-9650-9289
- Standard
- EN 15804:2012+A2:2019, ISO 14025
- Valid until
- 2030-04-08
- Verification
- Third-party verified
Product-specific declaration for the Kvillsfors-made window with aluminium cladding and Saint-Gobain ORAÉ® reduced-carbon glass. Year of study 2020.
Carbon profile
kgCO2e per 1 reference window (1.23 × 1.48 m) · each bar starts at zero · local scale
A1-A3 product
79.9
A4-A5 site*
8.72
B use
35.7
C end of life
44
D reuse / recycling
-6.73
Reported GWP Modules
Displayed as stored; modules are not added together here.
A1–A3
79.9 kgCO₂e
per 1 reference window (1.23 × 1.48 m)
A4*
3.26 kgCO₂e
per 1 reference window (1.23 × 1.48 m)
A5*
5.46 kgCO₂e
per 1 reference window (1.23 × 1.48 m)
B2
35.7 kgCO₂e
per 1 reference window (1.23 × 1.48 m)
B4
0 kgCO₂e
per 1 reference window (1.23 × 1.48 m)
C1
0 kgCO₂e
per 1 reference window (1.23 × 1.48 m)
C2
0.493 kgCO₂e
per 1 reference window (1.23 × 1.48 m)
C3
43 kgCO₂e
per 1 reference window (1.23 × 1.48 m)
C4
0.539 kgCO₂e
per 1 reference window (1.23 × 1.48 m)
D
-6.73 kgCO₂e
per 1 reference window (1.23 × 1.48 m)
Upfront Carbon (A1–A5)*
88.6 kgCO₂e per 1 reference window (1.23 × 1.48 m)
A1–A3 79.9 + A4 3.26 + A5 5.46 · GWP-total, as declared
Service Life — the B4 Replacement Input
60 years · EPD reference service life
The declared functional unit carries a 60-year expected service life; the EPD then declares real maintenance carbon (B2) across that life, which is why the use stage appears in the modules rather than being quietly omitted.
≈1 installation over a 60-year building study period.
Evidence Sources
EPD Norge (The Norwegian EPD Foundation)
Comparison Status
This result should be displayed for information only and not ranked against another product.
- • The carbon result is not linked to an evidence source.
- • The EPD is not linked to an evidence source.
Design & Specification Notes
Qualitative notes for early design discussion. Not product-specific EPD evidence, and not a basis for numerical comparison.
The opening version of the Kvillsfors window — side-hinged, inward opening, with a secondary sash — in the same alu-clad timber construction with ORAÉ reduced-carbon glass.
Typical Uses
- •Glazing systems
- •Daylight openings
- •Thermal envelope
Key Performance
Supports daylight and thermal performance of the envelope.
Specification Actions
- •Confirm FSC or PEFC certification for all timber products.
- •Request chain-of-custody documentation from supplier.
- •Verify glazing U-values meet or exceed building regs.
Indicative Health & Indoor Air
Specification
- Range
- Kvillsfors
- Finish
- Alu-clad timber window, side-hinged inward opening with secondary sash
- Service life
- 60 years
- Country of manufacture
- Sweden