REHAU Geneo PHZ is an enhanced, high-tech PVC profile system for windows, developed specifically for buildings that demand the very highest energy efficiency, passive houses in particular. Built on the pioneering Geneo platform, it relies on advanced RAU-FIPRO X material that delivers exceptional strength and stability with no steel reinforcement required — a key factor in reaching maximum thermal insulation. With an 86 mm installation depth and an optimized multi-chamber construction, the Geneo PHZ system attains outstanding thermal insulation figures that align with passive house standards.
Windows built on the Geneo PHZ profile offer superb sound insulation, shielding the room from outside noise effectively, along with a high level of burglary protection. With no steel reinforcement inside, the profile is lighter, which streamlines installation and handling. The smooth profile surface keeps maintenance easy. REHAU Geneo PHZ unlocks broad architectural design potential through its range of shapes, colors and finishes, allowing elegant, functional solutions that fully satisfy the strict requirements of modern energy-efficient construction.
Brand
Rehau is synonymous with quality in the world of PVC windows. The German corporation with 75 years of history produces profiles that set industry standards. From economical Euro-Design to innovative GENEO without steel reinforcement — we have a solution for any project.
More about REHAUTechnical Specifications
A dedicated Geneo variant fitted with thermal modules, certified for passive houses, offering record-setting thermal insulation.
Styling Features (Passive House Standard):
Glazing Choices:
Tested Performance (Passivhaus Institut Darmstadt Certificate):
Documentation
A dedicated Geneo variant fitted with thermal modules, certified for passive houses, offering record-setting thermal insulation.
For a standard 2-sash tilt-and-turn window (1200 × 1400 mm) with basic double-glazed unit.
Alternative solutions from other manufacturers
Side by side
How Rehau Geneo PHZ stacks up against the closest matches from other brands.
| Specification | Rehau Geneo PHZThis profile | Kömmerling 88 MD | Cortizo A 84 Passivhaus | Schüco LivIng 82 |
|---|---|---|---|---|
| Brand | REHAU | Kömmerling | Cortizo | Schüco |
| Material | PVC | PVC | PVC | PVC |
| Profile depth | 86mm | 88 mm | 84 mm | 82mm |
| Chambers | 6 chambers | — | — | 7 chambers |
| Glass unit, max | 53mm | up to 56 mm | up to 56 mm | up to 52mm |
| Thermal (Uw) | 0.73 | ≤ 0.7 | ≤ 0.66 | 0.8 |
| Sound (Rw, dB) | ≈50 Rw(dB) | ≈ 50 Rw(dB) | ≈ 48 Rw(dB) | ≈47 Rw(dB) |
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FAQs
It runs an 86 mm, 6-chamber RAU-FIPRO fiberglass-composite frame whose functional chambers are filled with thermal modules (foam inserts) to stop air convection. The composite removes steel reinforcement and its thermal bridges, giving Uf 0.79 W/m²K and a certified Uw down to 0.66 W/m²K (with Ug 0.5 glazing) — well below the headline Uw ≤ 0.73.
The sash accepts glass units up to 53 mm, so to hit Passivhaus figures it is glazed with double-chamber (triple) units filled with inert gas (argon or krypton) on warm spacer frames. Thinner double-glazing or oversized formats beyond 53 mm won't deliver the rated Uw; the glass is also bonded into the sash, which is what allows large panes without internal metal.
Yes. It carries a Passivhaus Institut Darmstadt certificate, with Uw up to 0.66 W/m²K meeting Europe's most stringent passive-house targets. Documented values also include RC3 burglary resistance, air-leakage Class 4, watertightness Class 9A and noise reduction Rw,p up to 47 dB (system ≈50 Rw with the right glazing).
The frame is built from RAU-FIPRO, a fiberglass composite stiff enough to skip steel reinforcement and the cold bridges steel creates. Its 6 functional chambers are then loaded with thermal modules that fully halt internal air convection, while glass bonded into the sash adds rigidity. Combined, these reach the certified Uf of 0.79 W/m²K — the basis of the passive-house rating.
At €950–1,200 it is Rehau's priciest window profile, so in mild Mediterranean climates its passive-house insulation is rarely cost-justified. It also depends on warm installation joints, perimeter sealing and planned ventilation to hit its numbers.
PHZ and standard Geneo share the 86 mm, 6-chamber RAU-FIPRO frame and 53 mm glazing, but PHZ's thermal modules push Uw ≤ 0.73 (certified to 0.66) versus Geneo's Uw ≤ 0.85, lifting it from A++ to A+++. Synego is the step below — 80 mm, 7 chambers, up to 51 mm glass and only Uw ≤ 0.94 — so PHZ is the choice strictly for certified passive-house performance.
