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Glass Unit Specification

At HI Q WINDOWS LTD we manufacture 28mm double glazed units, which are made up using one of the leading glass types in today's industry.  This creates a 20mm gap to improve thermal properties and noise insulation.


All of our glass units compromise of energy efficient Planibel A glass which is then filled with argon gas.


Planibel A


Planibel A glass is a low emissivity glass (LOW E) meaning that the surface of the glass radiates/emits low levels of radiant thermal (heat) energy.  This leads to lower energy consumption and CO2 emissions, and retains heat in the house.

















Argon gas


We also use Argon gas within the glass units which acts as an extra insulator resulting in better performance in energy efficiency and replaces the air inside the glass unit.  Since it is heavier and is not in continuous motion like air, the transference of heat and cold (convection) is greatly reduced.  Argon gas is clear so it does not reduce the clarity or view from the outside or inside of the glass.  It is an inert gas so will not react with anything, which sets aside any worries regarding health or environment after being installed in the windows.















A Spacer-bar is the continuous hollow frame which seperates the two glass panes in a double glazed window.  The spacer bar is bonded to the glass panes via a primary and secondary seal, creating an airtight cavity which is filled with air or gas.  The spacerbar itself is filled with a desicant to absorb any residual moisture within the cavity and thus prevent condensation within the double glazing window.  Spacer-bars are an important contributor to a double glazed window's energy ratings.  They are typically made of aluminium, or low heat conductive material.