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Why is low iron or “extra-clear” glass used in an A rated EcoClear double glazed unit?

April 26, 2017double ecoclear glass Glazed iron low rated Used

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Why is low iron or “extra-clear” glass used in an A rated EcoClear double glazed unit?

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] A: Low iron or “extra-clear” glass (SGG DIAMANT) is used as the outer pane of the double glazed unit in order to maximise the free solar heat gain (solar factor or g-value) of the window and hence allowing a room to benefit from increased heat transmittance.