Rationel Technical Performance

Energy efficient windows does reduce C02 emissions and your heating bill. Rationel offer the highest standards for technical performance regarding energy ratings, glass performance and sound insulation.

Rationel Sustainability

Rationel Sustainability

Rationel Durability

Rationel Durability

Rationel Technical Performance

Rationel Technical Performance

Rationel Technical Perfomance Rationel Technical Perfomance
  • Triple glazed v Double glazed
  • Light & heat transmission
  • Argon or Krypton filled glass units
  • EXAMPLE 1: Facades facing north

  • Triple-glazed energy efficient window designed to reduce the thermal loss as much as possible. Suited especially for energy efficient buildings
  • Uw value 0.79 W/m2K
  • WER -2.7 kWh/m2
  • EXAMPLE 2: For facades facing south, east and west

  • Triple-glazed energy efficient window designed to exploit the free solar heat as much as possible. Suited especially for energy efficient buildings
  • Uw value 0.85 W/m2K
  • WER +23.9 kWh/m2
  • EXAMPLE 3: For facades facing south, east and west

  • Prize winning triple-glazed energy efficient window designed to ensure heat gains through the window that exceed the thermal loss by far. Suited especially for energy efficient buildings (52 mm pane)
  • Uw value 0.73 W/m2K
  • WER +31 kWh/m2

Rationel Technical Performance For Glass

  • The glass is an important part of the windows performance
  • The opportunities are many
  • Choose glass in accordance with the projects needs

Energy

Energy

The glass has a thin metal coating which reflects the heat back into the house.

Secure

Secure

Laminated glass holds together when broken, so takes longer to break through.

Sound

Sound

Due to difference thickness of the panes the noise is reduced.

Facade

Facade

Used for full facades or for special colour effects.

Solar

Solar

The amount of solar heat coming through the windows can be reduced accordingly.

Safety

Safety

The glass consists of a toughened and/or a laminated pane.

Rationel Technical Performance For Sound

Rationel Technical Performance For Sound

Common format is “weighted reduction” Rw value, Correction factors C. for background noise & Ctr. for traffic noise

Example: Outside measurement = 70dB, Room requires 35dB max, therefore window needs to achieve including correction factors > 35dB. Typically a double glazed timber window will at best achieve 38-40dB.

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