Argon Filled Double Glazing

The injection of Argon into the cavity between the two panes of glass means the movement of warm air is slowed down which helps your double glazed unit to keep precious heat in and not escape through the outer pane of glass. We recognised the benefits of using argon for our customers over 10 years ago.

What is Argon?

‘The chemical element of atomic number 18, an inert gaseous element of the noble gas group. Argon is the commonest noble gas, making up nearly one per cent of the earth’s atmosphere.’

It is therefore amazing that it was not discovered until 1894, the technology was simply not available before then. Now we do know it exists it is very useful, Argon is non-reactive so it is a perfect element when really high temperatures are required such as with welding, when you look in a light bulb it looks like there’s nothing there, but in fact you are looking at Argon it is non-toxic, colourless, odourless and chemically inert.

So what has Argon got to do with double glazing? 

The name originates from the Greek word ‘argos’ meaning inactive, which in the window industry is exactly what we want it to be. The injection of Argon into the cavity between the two panes of glass means the movement of warm air is slowed down which helps your double glazed windows to keep precious heat in and not escape through the outer pane of glass. We recognised the benefits of using argon for our customers over 10 years ago and we have injected our A rated units with Argon as standard ever since.

Keeping heat in and cold air out:

If the double glazed unit was not injected with Argon it would simply contain dehydrated air, Argon has 34% lower thermal conductivity than air as its density is greater. It helps to minimise the movement of warm air as a result reduce heat conductance between panes. This is great for double glazing because in the winter more heat is kept in and in the summer when it is warm outside Argon does not allow too much heat to pass through the unit making rooms unbearably hot. Argon is a brilliant addition to a high performing unit as it can improve double glazing’s U value or energy rating by over 30%.

A thermal efficient combination:

At Finesse we use Argon gas combined with Low E glass on the outside of a double glazed unit and a thermal coating, Planitherm, on the internal pane to dramatically increase the thermal performance of our windows. Typically double glazed units filled with Argon achieve U values of 1.2, in triple glazed units this can even reach 1.0, we firmly believe it is worth the investment. The larger the unit of glass the gain from installing Argon filled unit is increased as the surface area is increased. If you touch an Argon filled unit you will be able to feel the difference as they are warmer which in itself helps to reduce condensation by making your window less attractive to condensation.

How is the gas injected?

It is a relatively simple process with massive benefits. Small holes are drilled into the seal when the unit is being constructed, the gas is then injected into the cavity and then re sealed once at least 90% of the unit is filled with gas, you cannot see these holes and you do not need to worry about the gas leaking out over time. Argon remains in a double glazed unit for the life of the unit and over 25 years will only lose around 5%.

We would be more than happy to discuss the benefits of Argon and other ways in which we can help your home become more energy efficient.