ENERGY LINE 78mm profile



ENERGY LINE 78mm windows are characterised by a line profile highlighted by rounding of r 4mm radius. They are made of three-ply square timber which is 78mm thick. These are energy efficient windows with a frame thickness of 78mm. Such a deep profile guarantees a much better parameters for energy save than standard windows with a profile of 68mm. Energy efficiency rating of our windows has been increased by nearly 30% by using glass with thermal conductivity coefficient of U=0,7.


Technical parameters

  • Single frame construction
  • A three-ply square timber. Frame thickness 78mm
  • Any shape and size of the window available
Pine, meranti or oak.
Acoustic insulation
Acoustic insulation at Rw=32-39dB (depending on the selected glazing unit).
Thermal transition
The heat transfer coefficient Uw – ranges from 1,20 to 0,97 W/m2K.
  • Triple glazing unit - 4/14/4/14/4 – double chambered system.
  • Thermal insulation glass of Ug = 0,7 W/m2k.
  • Inter-pane space is filled with argon gas.
  • The possibility of obtaining heat transfer coefficient up to 0,5 W/m2k.
  • Choice of any glass panes with maximum thickness up to 50mm.
  • Distance frame is offered as standard.
  • Extra insulation frame matching window colour is also available.
Standard multi point G-U fittings with micro ventilation and anti-burglar catch. Optional fittings with extra safety class are available:
  • RC 1 minimum of four anti-forcing catches in a window,
  • RC 2 all anti-forcing catches applied in a window.
Optional use of sash turn limiter, limited tilt, a balcony latch.
Opening method
R (turn), U (tilt), RU (tilt and turn).
  • Coating colours from RAL palette or azure colour (emphasizing wood structure) from a catalogue of transparent colours.
  • The same colour from the inside and outside as standard.
  • Optional double colour: RAL/azure, azure/RAL.
  • A four-layer coating system: impregnation and triple painting.
As one of very few in Poland we use two seals Q-LON (inside and outside applied) as standard. The core is made of polyurethane foam, outer coating of polyethylene is weatherproof, resistant to UV radiation and pollution. Compatible with cleaning agents.

Available colours:
  • brown
  • white
  • black
  • grey
  • beige
  • light oak
  • chestnut
Drip cap
Aluminium drip cap available in colours:
  • white,
  • golden,
  • silver,
  • brown,
  • olive.
Optional aluminium drip cap covered by wood – matching window colour (RAL or azure) and aluminium drip cap available in colour from a RAL palette (matching window colour).
Silicone colour matches wood colour:
  • transparent
  • white
  • black
  • chocolate brown
  • pine
  • rustik oak
  • dark brown
  • walnut
  • mahogany
SECUSTIK® handles of HOPPE company are available in colours:
  • white (F9016),
  • brown (F8077),
  • silver (F1),
  • BRONZE Anodized,
  • titanium (F9).
Optional: A handle with a key or a button in colours:
  • white (F9016),
  • brown (F8077),
  • silver (F1),
  • antique gold (F4),
  • titanium (F9).
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