PVCOpening

P74 CLASSIC

Engineered for strength, designed for size.

Window Uw: from 0.92W/m²K
Acoustic insulation: 47dB
Glazing up to: 48mm
Installation depth: 74mm

PVC windows and doors

A robust window system focused on stability, enabling large, durable and high-performance window constructions.

Key features

Reinforced steel chambers for maximum profile stability
High flexural rigidity supports large window designs
Ideal for projects requiring wide openings and large surfaces
Excellent resistance to mechanical stress from wind and use
Tailored for demanding architectural and structural needs

Enquire about this system Catalogue 2026 (PDF)

P74 CLASSIC

Technical specification

Window Uw: from 0.92 W/m²K*
Thermal transmittance Uf: 1.20 W/m²K
Wind resistance: Class C5/B5
Air permeability: Class 4
Watertightness: Class 9A
Acoustic insulation: Rw ≤ 47 dB
Glazing up to: 48 mm
Installation depth: 74 mm

Uw — thermal transmittance of the whole window (frame + glass unit), for a 1.23 × 1.48 m window with the best glass unit for the system. The exact value depends on size and glazing — we state it in the quote. * calculated by us to EN ISO 10077-1.

Uf is the thermal transmittance of the frame only. The Uw value for the whole window depends on the glazing and dimensions.
Reference test AEV: 1.23 × 1.48 m, 2 sashes. Thermal insulation depends on the combination of profiles and the thickness of the infill.

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