PHI-certified passive component
Component 2491wi03 is certified at phB for the cool, temperate climate zone, with Uw 0.78 W/(m²·K) and installed Uw values meeting the certificate criterion of 0.85 W/(m²·K) or better.
PHI-certified cold-climate flagship — configuration control required
Extreme-cold flagship · full-FRP
FD90 90 Series cold-climate window.
A 90mm full-FRP casement platform for demanding winter envelopes. Passive House Institute certificate 2491wi03 covers the Fengdu Passive GFRP 90 Series for the cool, temperate climate zone at efficiency class phB, with a certified whole-window Uw of 0.78 W/(m²·K). Its pultruded full-FRP route is positioned for a strong performance-to-cost ratio in qualified passive-building programmes.
FD90Full-FRP casement window system
90 mmFrame depth
phBPHI efficiency class
0.78Certified whole-window Uw
2026Certificate valid through
FD90 · cold-climate engineering
Built for demanding winter envelopes.
PHI certification provides an independent component reference for passive-building use in the cool, temperate climate zone. FD90 is also positioned for cold-region, ultra-low-energy and nearly-zero-energy projects, subject to matching the certified build and verifying project size, glazing, edge spacer, hardware, joints and installation.
High performance-to-cost route
Pultruded full-FRP profiles, a 90mm platform and flexible profile or glass-free CKD supply combine certified thermal capability with a value-engineered route for qualified production programmes.
Weather and acoustic control
Catalogue grades reach 9 for wind resistance, 8 for airtightness, 6 for watertightness and 5 for sound insulation.
Current PHI certificate · valid through 31 December 2026
PHI-certified for passive buildings.
The official Passive House Institute certificate identifies the certified window-frame component as Fengdu Passive GFRP 90 Series by Chongqing Xianju New Material Co., Ltd. It satisfies the component criteria stated in the certificate for the cool, temperate climate zone.
- Component ID
- 2491wi03
- Certified product
- Fengdu Passive GFRP 90 Series
- Climate / class
- Cool, temperate · phB
- Certified Uw
- 0.78 W/(m²·K), with Ug 0.70 W/(m²·K)
- Installed Uw criterion
- ≤ 0.85 W/(m²·K)
- Hygiene criterion
- fRsi=0.25 ≥ 0.70
Certified performance with a value-engineered route
FD90 combines an independently certified thermal reference with a pultruded full-FRP platform and flexible local-fabrication supply. This supports a strong performance-to-cost proposition for passive and cold-region building programmes; the actual commercial advantage is confirmed project by project against glazing, hardware, fabrication and logistics.
- Certified whole-window Uw 0.78 W/(m²·K) for the identified PHI configuration
- Pultruded full-FRP profiles avoid a continuous metal thermal path
- System-profile or glass-free CKD supply keeps final glazing and assembly local
Certificate scope is configuration-specific. Any quotation or project that cites PHI certification must match the certified frame build, glazing, warm-edge spacer, seals and installation conditions identified in certificate 2491wi03; destination-market approval remains separate.
Source-catalogue performance grades.
The grade values below are catalogue references for the FD90 system. They must be verified against the ordered specimen and the applicable local standard.
Opening configurations.
One 90mm platform supports familiar cold-climate opening formats while retaining the same full-FRP frame family.
- Inward casement
- Inward tilt-turn
- Double casement
- Inward or outward door configuration
System reference specifications.
| System designation | FD90 / 90 Series |
|---|---|
| Construction | Pultruded glass-fibre reinforced composite (full-FRP) profiles |
| Nominal frame depth | 90 mm |
| Load-bearing profile wall | 3.0 mm |
| Maximum sash load | 130 kg |
| Catalogue frame Uf | 0.85 W/(m²·K) |
| PHI component certificate | 2491wi03 · phB · valid through 31 December 2026 |
| PHI certified whole-window Uw | 0.78 W/(m²·K), with Ug 0.70 W/(m²·K) |
| Glazing route | Project-selected double or triple insulating glazing |
| Supply route | Qualified system profiles or glass-free CKD package |
Recommended cold-climate configurations.
Thermal values are reproduced from the supplied 2026 catalogue for the listed glass build-ups. Slash-separated values reflect the catalogue alternatives; units are W/(m²·K).
| Catalogue glazing | Glass Ug | Frame Uf | Window Uw | Hardware |
|---|---|---|---|---|
| 5 Low-E + 16A/Ar + 5 + 16A/Ar + 5 | 1.20 / 1.10 | 0.85 | 1.35 / 1.30 | Project schedule |
| 5 Low-E + 16A/Ar + 5 Low-E + 16A/Ar + 5 | 0.90 / 0.80 | 0.85 | 1.10 / 1.05 | Project schedule |
| 5 Low-E + 18A/Ar warm edge + 5 Low-E + 18A/Ar warm edge + 5 | 0.85 / 0.70 | 0.85 | 0.95 / 0.85 | Project schedule |
Qualification gate: catalogue thermal and performance values apply only to the identified configuration. Final claims must be confirmed for the ordered dimensions, glazing, spacer, hardware, seals, corner joints, installation node and destination-market test method.