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Passive House Windows

Viking’s  SW14 aluclad passive window is the first outward opening passive house window developed and manufactured in Estonia and certified by the Passive House Institute in Germany.

With weather proof construction specifically developed to withstand the climate of Estonia and Nordic countries, the window’s three gaskets ensure that the frame and casement are well insulated and condensation risks are minimised.

Sashworks Passive House windows feature 50 mm triple glazing panes with 2 low-E coatings (Planitherm Ultra N or Planitherm ONE), argon filled and fitted with warm edge spacers (SGG Swisspacer Ultimate) . Sun protection coatings (e.g. SKN174) may also be selected.

  • Aluminium profile system improves the durability of wooden windows.
  • Espagnolette with locking points around the casement makes the window secure while closed.
  • Viking SW14 aluclad passive window’s thermal transmittance Uw: As a rule, when certifying passive windows, the prerequisite that in the case of the U-value of glazing Ug = 0.70 W/m2K then the thermal transmittance of the window must be Uw = 0.80 W/m²K. Taking into consideration the climate in Estonia and the Nordic countries, it is important to use glazing with better insulation.

Viking SW14 window in available in various opening types. Fixed light and opening windows can also be installed on one handle.


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0800 055 6223