We have an 1890s Victorian, fabulous HUGE windows, which work great for natural cooling, but we're installing central a/c and heat. Some panes are broken and have to be replaced anyway, but what can we replace them with, without replacing the entire window (for $860/window!)?
What would be the most energy efficient, given the size - can't do double pane because there's not enough space. We can re-work the windows ourselves a bit to add an extra 1-2/16s of space to fit glass, but would such glass be any more energy efficient than what's there?
We have 14 windows - most 8ft x 3 ft (one is 8 ft x 6ft, and 2 are smaller). Eventually we'd like to make all more energy efficient, but for now, will just replace the broken ones.
Thoughts?