U value is the measurement of heat transfer through glass, the lower the u-value the greater the thermal insulation performance.
Self cleaning glass is a float glass with a special photocatalytic coating which uses UV light and rain to actively break down dirt so your windows stay cleaner for longer, ideal for conservatory roofs.
Argon gas is a colourless, odourless non-toxic inert gas that is injected in the airspace of an insulated sealed unit, to improve energy efficiency.
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