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Insulating glass unit (IGU) using Pilkington K Glass™ OW on surface four of the unit and Pilkington Optitherm™ S1 Plus on surface two, achieving an extremely low Ug-value of 0.9 W/m²K. It is equivalent to triple glazing performance but in a double glazed unit.

Adding an on-line low-e coating to surface four of an IGU reflects additional infrared heat back into the house, reducing the amount of radiant heat loss through the glass. By applying low-e coatings on two surfaces of an IGU the centre pane Ug-value can be significantly reduced and thus reduce the amount of heat that is lost.

General information
Specification data - Insulated glass units (IGUs)
Product Reference

Pilkington energiKare™ Advantage Glazing


Consult manufacturer.

Standard product features


  • Outer pane: Pilkington Optitherm™ S1 Plus.
  • Inner pane: Pilkington K Glass™ OW.

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