Imperial SU – window with hidden sash

  • three-chamber window system with thermal insulation designed for designing windows with hidden sash, invisible from the outside,
  • the system features specially designed shape of the frame hiding the full height of sash profile,
  • a wide range of glazing allows using all types of single and double cavity, acoustic and anti-burglary glass panes,
  • profile drainage in two variants: traditional and hidden,
  • the option of bending profiles,
  • hidden sash system is the system preferred by designers, as it allows “hiding” windows in aluminium and glass structure; thanks to application of this solution opened and fixed window segments look identical from the outside,
  • a wide range of colours available – RAL palette (Qualicoat 1518), structural colours, Aliplast Wood Colour Effect (Qualideco PL-0001), anodized (Qualanod 1808), bi-colour.
Imperial SU Series: Classic Elegance Meets Modern Performance

Technical specification

systemMaterialDepth of frameDepth of leafGlazing rangeType of windows
IP SUaluminium/ polyamid2916in24364in0532in-13964inhidden sash


Design Pressure (DP)Structural Pressure (STP)U-FactorSHGC (Solar Heat Gain Coefficient)Visible TransmittanceCondensation Resistance
Imperial Tilt Turn Window+45.1psf+67.7psffrom 0.24from 0.12from 0.1055
Imperial Fixed Window+75.19psf+112.78psffrom 0.16from 0.13from 0.1549

Do you want to find out if our collaboration terms are suitable for you and your business?

Download full Imperial Series Tilt & Turn Window Certificate


AAMA/WDMA/CSA 101/I.S.2/A440-11,
AAMA/WDMA/CSA 101/I.S.2/A440-17,


Download the PDF

file and save it to a disk to explore the details of the American Systems Windows later.