What’s a vacuum and what’s the “dots’ got to do with it?

Vacuum insulated double glazing can hold the force of 10 tonnes of pressure on it that's supported by Ceramic bridges or 'black dots'

Ceramic bridges holding back 10 tonnes of atmospheric pressure!

Why can a thin 6.1 mm section of glass offer way better thermal performance for heating and cooling than any double glazing unit on the Australian market? In fact Glavenir vacuum insulated double glazing by Panasonic, provides triple glazed performance.

The performance “magic” of Glavenir is that instead of air or argon gas between the two sheets of glass there is in fact nothing. Nada, zip, zero! 

No gases, no molecules only what is called a vacuum. A vacuum is the best type of thermal and acoustic insulator and there only needs to be a small vacuum space between the inside and outside surfaces to achieve the best thermal insulation properties.

Do you remember the good old  “thermos”? Some of us took them to school and work to keep soup and hot drinks hot. A thermos is a flask that uses the principles of a vacuum inside the flask to insulate against heat loss. A giant vacuum also exists in outer space as well. So the science behind vacuum glass is well established and has been known and researched for over 80 years.

With the development of computer technology and manufacturing tolerances leading manufacturers such as Panasonic are able to manufacture thin sheeted glass with a vacuum. Panasonic have been leaders through the development of this through their flat screen technology.

Now some of you may be asking, “what stops the glass from collapsing inwards if there is a vacuum between the two sheets of glass”? Good question. Unlike a conventional double glazed unit which has a soft rubber seal around the edge, which is very prone to leaking out gas and leaking in moisture, vacuum double glazing has two technology differences which gives that magic:

1. The edge seal is a hard molten seal and therefore its thin and strong and does not breakdown like rubber seals used in conventional double glazed units. A predicted lifespan of in excess 50+ years is now expected from vacuum glazing.

2. Between the glass there is a grid of very small support pillars, some commonly call them “dots”. These provide load strength to the unit and also stop it from collapsing inward. The pillars are so strong that if you had a 1 m x 1 m section of vacuum glass it withstands the weight of 10 tonnes or a double decker bus on both side of the glass!!! How amazing is that? 

We’re aware that some people focus on the pillars (“dots”) and they can become an objection to using this glass. Let us delve a little closer into why they should not be the focus of rejecting such ground breaking insulating glass:

  • The pillars are very small and back a very short distance from glass cannot even be seen.
  • Window are designed to be looked through to the outside view. Therefore our focus is through the glass not on the glass.
  • If you focus on any type of glass you will see blemishes, dirt, dust, road grime, smudges, finger prints, maybe scratches and even bird poop!

The two points below are also crucial considerations to weigh up “can I live with new space aged glass and its benefits if I can see some small dots when I walk up close to the glass”?

  • Conventional rubber sealed double glazing has a very thick black rubber seal and its prone to breaking down,  and the seal is very visible, whereas vacuum insulated glass is thin, it fits into windows and it has an edge seal that adds strength, longevity and you cannot see it.
  • No double glazing will provide the level of thermal efficiency any where near that of Glavenir vacuum insulated double glazing. – Click the link here to look at how you compare performance of glass.

So what’s the carry on about the “dots”?

To understand more about how Glavenir vacuum insulated double glazing works and why click on this LINK for a video.

Besides all of this look below at what our customers say about Glavenir vacuum insulated double glazing.

To learn more about vacuum insulated double glazing – return to our Home page.