Replacement Windows: Making Sense of U-Factors, Low E- Coatings, and Argon Jargon

Windows filled with argon gas are being advertised as the latest in energy efficiency, and in theory this technology should work. 

When manufacturers fill the space between two panes of window glass with argon, the thermal insulation is increased by reducing the conductivity of the air space between the layers.

In a sealed glass unit filled with air, air currents carry heat to the top and cold air collects at the bottom. Filling the space with a slow moving gas minimizes the transfer of heat.

Argon is used for several reasons:

Click here to read more Argon Jargon.