A 84 HIDDEN SASH // Minimalism in PVC


The new system of the Galician multinational company presents a minimalist aesthetic with a sight line of only 90 mm, offering excellent performance both in its PassivHaus version (Uw≥0.71 W/m²K) and in the standard version (Uw≥0.74 W/m²K)

CORTIZO presents the new A 84 HIDDEN SASH series, a minimalist window with a viewed section of only 90 mm with possibility of a reduced centre junction of the same size, allowing maximization of the glazed surface and the entrance of natural light in the area. This 84 mm deep system with 6 inside chambers combines its elegant design with excellent thermal benefits, reaching a transmittance value Uw from 0.74 W/m²K. These features are improved in its Passivhaus version, certified for the warm-temperate category, which has a Uw value of just 0.71 W/m²K, becoming an ideal solution for buildings with low energy consumption in areas with warm and temperate climates, such as the Spanish geography. The new CORTIZO PVC A 84 Hidden Sash has a maximum glazing capacity of 46.5 mm, allowing triple glazing and exceptional acoustic insulation of up to 46 dB.

All these benefits are reinforced by the great results achieved in the AEV test benches: Class 4 in air permeability, Class E2100 in watertightness and Class C5 in wind resistance. Along with the entire CORTIZO PVC range, the new A 84 Hidden Sash also stands out for the quality of its profiles: CLASS A (main wall thickness of 3 mm), CLASS S (suitable for severe climates; optimal solar behaviour) and CLASS II (maximum impact resistance).

The A 84 Hidden Sash system presents an elegant aesthetic with clean lines and is offered in a wide range of finishes in white, color, bicolored, wood imitation and metallic. It is available both in window and balcony versions with maximum sash sizes of 1,400 mm wide by 2,500 high, weight of up to 130 kg per sash, and possibility of inwards opening, including side hung, turn-and-tilt or bottom hung.



Passivhaus Uw ≥ 0.71 (W/m²K)

Standard Uw ≥ 0.74 (W/m²K)

Acoustic insulation Up to 46 dB

Air permeability Class 4

Wind resistance E2100

Water tightness Clase C5

Reference test AEV 1.23 x 1.48 m, 2 sashes

Opening possibilities

Side hung

Tilt & turn

Bottom hung


Frame 84 mm

Sash 84 mm


46.5 mm

Maximum dimensions/sash

Width (L) = 450-1,400 mm

Height (H) = 450-2,500 mm

Maximum weight/sash

130 kg

Consult maximum weight and dimensions according to typologies