COR 70 Hidden Sash
Hidden sash with the Arch Invisible handle.
Application Example 2
Selecting this family for a Canadian project
For aluminum, compare the thermal break, glass, sightlines and the limits of the selected frame and opening configuration. Provider catalogue figures describe particular configurations. Confirm the whole-unit result, rating method and available documents for your sizes with your local designer and building official.
U-factor figures use imperial Btu/(h ft2 F) unless another unit is stated; metric values use W/(m2 K). Uf describes the frame, Ug the glass, and Uw the whole window. SHGC and ER are dimensionless. Converting units does not establish certification or Canadian code acceptance.
Canadian orders use DAP to the agreed named place, with the Canadian buyer as importer of record. Import charges, unloading and local installation need their own confirmed scope. Site access and remote delivery require individual review.
Overview
What makes the COR 70 Hidden Sash
stand out.
COR 70 Hidden Sash is the Cortizo platform built around the Arch Invisible handle. The operable leaf sits behind the outer frame, so from the street an opening window is indistinguishable from a fixed pane - and unlike most hidden-sash systems, the handle disappears too. Arch Invisible is integrated into the sash profile itself and operated from the side, so from the front there is no lever at all, only glass and frame. Concealed hinges and concealed drainage complete the detail. The 70 mm frame carries a 35 mm polyamide thermal break, glazing to 40 mm, and one of the narrowest visible sections in its depth class at 66 mm. Casement, tilt & turn, bottom-hung, and parallel-sliding leaves all run on the same profile, so a whole elevation keeps one sightline regardless of how each unit operates.
Learn more about thermally broken aluminum technology or compare European aluminum system providers.
Key Highlights
- Arch Invisible handle: integrated into the sash profile and operated from the side, so nothing shows from the front
- Sash concealed behind the frame: operable units read as fixed glass outside
- 66 mm visible section - narrow for a 70 mm platform
- Concealed hinges and concealed drainage, so no visible weep slots
- PAS 24 security approved with multi-point perimeter locking
- Four opening types on one profile - uniform sightline across the elevation
Ideal For
Modern facades where the elevation should read as uninterrupted glass, projects that mix fixed and operable units in the same opening, and interiors where a protruding handle would break the line - flush casings, deep reveals, minimalist detailing.
Consider an Alternative When
If the project needs thicker triple or acoustic glass, the Reynaers MasterLine 8 Functional variant lists vent glazing up to 72 mm. That limit does not apply to Hidden Vent; confirm glazing capacity for the selected profiles. If a concealed sash is essential, review MasterLine 8 Hidden Vent or Aliplast Genesis 75 SU separately for the required glass and hardware.
Technical specifications
Handle
Arch Invisible (side-operated)
Frame Depth
2.76" (70 mm)
Visible Section
2.60" (66 mm)
U-Factor (best)
0.15 (Uw 0.84)Units: The Uw, Uf, Ug or Ud figures shown alongside the imperial U-factor use W/(m2 K). These describe different parts of the assembly.
Thermal Break
1.38" (35 mm) polyamide
Glazing Range
1.02" - 1.57" (26-40 mm)
Max Sash (standard)
4' 3" x 7' 10" (1,300 x 2,400 mm)
Max Sash (HD side-hung)
3' 11" x 11' 6" (1,200 x 3,500 mm)
Max Sash Weight
353 lbs (160 kg)
Air Infiltration
Class 4 (EN 12207)
Water Resistance
Class E1800
Wind Load
Class C5
Acoustics
Up to 46 dB (Rw)
Security
PAS 24 approved
Opening Types
Casement, tilt & turn, bottom-hung, parallel sliding
From this system to your opening schedule
Review the opening type, dimensions, glazing, finish and installation interface together. Provider references describe a system family; the documents for your project need to match the proposed assembly and local requirements.
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Get COR 70 Hidden Sash for your project
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