What are alternatives to double glazed windows? For Retrofitting?

Question

What are alternatives to double glazed windows? For Retrofitting?

Answer 1

Old style storm windows.

Answer 2

there are some units that look like older style windows while still having the comfort of d/glazing go to a good supplier and look at the alternatives i have ones that look like wooden sash windows

Answer 3

I'm not being facetious when I state that triple-glazed windows are an alternative. :-)

http://www.thermotechwindows.com/WhyTrip...

These are considered to be the current highest performing windows in the world, with the possible exception of ones with aerogel laminated between the glass. However, aerogel looks a bit smoky and allows less light in. It also is extraordinarily expensive, and is probably not available for residential use.

If you're at a high elevation, like at 7-10,000 feet in the mountains, keep in mind that the argon gas will eventually leak out of the seals in double-glazed windows meant for lower elevations and the efficiency will drop as time passes. These windows will only last about 15-20 years before needing replacement in that circumstance.

Or at least that's how it was two- three years ago: this problem might have been solved by now. Obviously I haven't checked lately.