[palmer]

If CO2 is sooooo good at reflecting heat why don’t the manufacturers of double and triple-pane windows use it instead of argon to fill the gaps in between the panes?

They do: http://web.ornl.gov/sci/buildings/2012/1982%20B2%20papers/036.pdf

[Jack Hydrazine]

They’ve tried CO2, but that’s it. No mentions otherwise. Argon insulates a bit better than CO2.