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Low-E Insulating Glass

Where greater solar and thermal control is required, low-E glass can be used. Low-E insulating glass absorbs and reflects a major proportion of the sun’s direct heat energy more effectively than standard tinted glass.

The Sun’s direct transmission on the glass is not the only way in which heat is transferred. Heat is also transferred by method of re-radiation, conduction and convection. Low-E Thermal control refers to the ability of a glazing to resist heat transfer through these three methods. (Similar to the functional performance of batt or insulation foil for walls and ceilings).

With a low-E coating will improve the insulation properties of the glass when compared to ordinary non coated glass. These thermal or insulation improvements work day and night in both summer and winter conditions, reducing heat entry and heat loss. Only low-E coated glass and IGU’s can provide improved thermal control.


  • A low-E coating consists of a microscopically thin, virtually invisible, metal or metal oxide layer deposited on the glass pyrolytically (hard coat) or in a vacuum coater (soft coat);
  • Helps reduce summer heat gain and winter heat loss through improvements in SHGC and U-values when compared to ordinary non coated glass
  • Reduces heating and cooling energy costs
  • Reduces ultra-violet substantially
  • Best performance achieved in double glazed units though in single glazing situations can still provide superior performance and higher thermal insulation to many tinted and some reflective glass products


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