[HayZee518]

I don't know what the benefit is of using argon. The manufacturer's could've used dry nitrogen for that matter, or any inert gas at low pressure. What we're dealing with is the transmission of heat through a substance. take a simple window - one pane. Apply cold to one side and radiant heat to the other. one side is going to condense moisture and freeze. ok, a double pane window with some gas inside. one side will be cold, the other will be hot or warm. something inside between the two panes has got to happen - a warming or cooling effect. Ideally the absence of any gas seems more plausible. In a vacuum there's nothing there to heat up or cool down, so you're not transmitting heat or cold in or out. For framing, wood seems the best. It is a natural insulator. one side can be warm to the touch and just 1 1/4 inches away the other side can be ice cold. Plastic composite windows will transmit coolness and/or heat by conduction alone, same as metal [aluminum] with a foam center.