By keeping the heat or cold air inside the house the windows provide a better insulator than windows with oxygen between the panes.
Argon filled windows condensation.
Air also insulates less effectively than gas fills.
You ll notice this only when the window has lost a significant portion of the gas as condensation will build up inside the product without the argon gas.
In this way the gas between the double paned windows are less effected by convection currents and drafts.
It is this sealed space that gives the window most of its thermal performance.
If an argon filled window has even the smallest gaps in it the argon gas that escapes can be replaced by moisture laden air.
Another trademark problem of double pane windows that have become exposed to drafts and likely lost all the argon gas is when condensation builds up on the inner surface.
When effective double pane windows should not produce much or any condensation.
In this case the insulation barrier reduces the heat transfer from the hot air outside so your home will stay cooler inside in the summer.
The short story is that the introduction of argon into the space between two panes of glass creates an insulation barrier.
Double pane windows also called insulated or thermal windows are made with two panels of glass sandwiched over a spacer and sealant creating a space between the panes that is filled with air or with a gas usually argon or krypton.
Sometimes a basic clean will take care of the problem.
Argon filled windows also reduce the tendency for condensation to form on the inside of windows reducing the likelihood of the window trim experiencing moisture related problems.
In general the lower the u factor the better job a material will do at insulating.
Just like the insulation in the walls of your home argon gas filled windows keep the heat in and the cold out.
Of course the opposite is true when installing energy efficient insulated glass windows in warm climates.
Argon gas windows are energy efficient due to the density of argon gas being heavier than oxygen.