I am sorry. I appears that most folks, present company included, are too familiar with the Canadian energy ratings.

Do you know if they sell that same window in the US?

Hi Windowsonwashington!

Thanks for your reply. I think these windows are available mostly in Canada and Europe. I don't see any US company references on their website. Anyway, I am going to post a different question about a fiberglass window (my other front runner)-- perhaps more posters will know about these windows?

Thanks,

Carol

Hi Ontario Mom.
We're considering Eurotech windows as well as their bifold door. Did you end up going with them? Were you happy?
Thanks.

Carol was building a pretty high efficiency structure and was way...way more informed than the normal consumer.

I would be very interested to see/read her feedback.