Argon filling windows?
 

Has any one tried filling windows that came from the factory filled with air or nitrogen and replacing it with argon?

I already have the equipment, argon and a purge regulator for back purging stainless steel pipe I weld. So it would cost almost nothing for me to do.

The only problem I see is sealing the fill holes which would come in from the side good enough so the argon can't get out.

I can't decide if you are a spam account or not. Your posting patterns are odd and only seem to tangentially relate to the original post.

Anyway OP,

I'd give it a try. Particularly if it's a window you'd otherwise have to replace. I did some googling and there doesn't seem to be much in the DIY space for refilling windows, but I found that some companies are starting to offer this as a service. There isn't anything that can't be sealed with enough silicone. I've used it before as a self sealing membrane for hypodermic needles, seemed to work well and seems like a similar process could be used here. If I'm not mistaken the goal isn't to actually pressurize the window in any significant manner.

Yeah the one large custom order window I bought for the living room was argon filled. I think it cost an additional 30 some dollars.
I use 120 cubic foot argon bottles. If I used 1 cubic foot per small window that would cost me less than $1 in argon.
The problem with using silicone is the silicone inside the window won't cure because there is no oxygen.

I guess I will just have to drill one, purge it, fill it, seal it and see what happens.