Asked the window fitter. Answer: "You can't say it like that...calculate 80 euros here and then 40 euros there and then blah blah..." He couldn’t (or wouldn’t) give me a price for a standard window. That’s no use to me. I emailed Roma myself...no response after more than a week...so much for the topic "ask the manufacturer!" Back to the subject. Has anyone here installed this system and can give the price for a standard window external roller shutter (electric, without fly screen! Before someone asks what I mean by that: 1.26 x 1.26)?