Okna 400, 500 800?
New member, first post. I've been reading about windows on the forum. We need new windows, and I'm looking hard at Okna. What are the real differences between the three series? The local dealer made it seem the differences were purely cosmetic.
If you had to choose between using 800 series to do half the house, or the 400 series to do the whole house now, which would you choose? Performance and longevity are my primary concerns.
Replacing single pane with triple track storms...