Imperial SU – Concealed Sash Windows
- A three-chamber window system engineered for thermal insulation, ideal for creating windows with hidden sashes that remain invisible from the outside.
- The system features a specially designed frame shape that conceals the full height of the sash profile, enhancing aesthetics.
- Offers a diverse range of glazing options, accommodating various types of single and double cavity, acoustic, and anti-burglary glass panes.
- Profile drainage is available in two variants: traditional and hidden, ensuring efficient water management.
- Provides the option of profile bending for customization as per design requirements.
- The hidden sash system is favored by designers for its ability to seamlessly integrate windows into aluminum and glass structures, maintaining a uniform appearance of both opened and fixed window segments from the outside.
- Choose from a wide array of colors, including selections from the RAL palette (Qualicoat 1518), structural colors, Aliplast Wood Colour Effect (Qualideco PL-0001), anodized (Qualanod 1808), and bi-color options, ensuring versatility in design.

Technical specification
system | Material | Depth of frame | Depth of leaf | Glazing range | Type of windows |
IP SU | aluminium/ polyamid | 29⁄16in | 243⁄64in | 05⁄32in-139⁄64in | hidden sash |
Performance
System name | Design Pressure (DP) | Structural Pressure (STP) | U-Factor | SHGC (Solar Heat Gain Coefficient) | Visible Transmittance | Condensation Resistance |
---|---|---|---|---|---|---|
Imperial Tilt Turn Window | +45.1psf | +67.7psf | from 0.24 | from 0.12 | from 0.10 | 55 |
Imperial Fixed Window | +75.19psf | +112.78psf | from 0.16 | from 0.13 | from 0.15 | 49 |
Are you interested in determining whether our collaboration terms align with your business needs?
Download full Imperial Series Tilt & Turn Window Certificate
SPECIFICATION:
AAMA/WDMA/CSA 101/I.S.2/A440-11,
AAMA/WDMA/CSA 101/I.S.2/A440-17,
A440S1-17.