Boy are HGTV & BHG behind the times! We've not only had counter height windows for years on GW, but also the "indoor/outdoor bar" (I remember seeing some back in 2007!) Unfortunately, I don't appear to have bookmarked the threads I saw them in and don't remember who had them. The one I remember most vividly is the one that opened on to the pool deck. IIRC, it had a sliding window...

Before you proceed with this...where do you live? Does it get cold in the winter there? The granite counter will draw the heat out of the house & the cold into the house. If you're in a climate w/year round warm temperatures, you'll probably be fine.

Here's a thread to look at:

Thread: Counter window hight -- please help! (scroll down for directions on how to measure for counter height windows)
http://ths.gardenweb.com/forums/load/kitchbath/msg0323174631800.html

brittu, have you checked with Nanawall themselves? Just looking at their spec sheet, it looks like you have a variety of sizes and configurations to choose from.

Here is a link that might be useful: Nanawall specs

Forgot to add -- looking thru their gallery I saw at least one kitchen that had a combo window/door unit.

This may well have been the unit you saw on HGTV.

It was Cloud_Swift's kitchen! Found pictures of svwillow1's and a thread w/Cloud_Swift's...

Picture:
http://photos.gardenweb.com/home/galleries/2007/06/pass_thru_window.html

Thread: window pass-through from kitchen to outside (?deck?) (scroll down for a pic of Cloud-Swift's window)
http://ths.gardenweb.com/forums/load/kitchbath/msg1222430926470.html

I remember that thread!

My new kitchen will have the outside counter window height, but I decided against the standard version. My counters (in and out) are tile, and my window is wood. It's a double sliding (XX) window, and the sections can be easily removed. I haven't done a screen, but might add a roller screen if I think I need it. Because it's wood, the window jamb is something like four inches wide and has runner rails.

If you don't have a truly mild climate you should have a "thermal barier" rather than a truly continuous counter. That means at least a channel. Aluminum and vinyl windows work for this kind of application. There's something about having weepage drains and making them work... There are also windows that just slide across and have only a rubber gasket beneath. I was told emphatically that an accordion style hinged window would have a lot of failure problems in this application, but Nanawall and the like might be better.

I went through a lot of choices. I thought it would be frustrating to have the wide counter but only be able to get at half of it, like with a normal, single side opening window. The doors on that side of the house (it's the only downstairs window) are all wood with divided lights, so looks were important. I seriously thought it was going to be a French Casement for awhile, like my front windows. There was a lot of discussion of drainage. This is what I ended up with. Love the window. The counters aren't in yet.

What would be really great would be windows that slide into the wall. But that would take some fancy wall. :)

Brittu--You might try looking at concession stand/ trailer windows. At the link, scroll down to the bottom of the page for an example from that mfg. (Custom sizes available, according to the website.)

Otherwise, try visiting some commercial window & door retailers--the places that specialize in commercial bldgs/ storefronts for developing leads to suppliers.

Here is a link that might be useful: Humphrey Concession Windows

"What would be really great would be windows that slide into the wall. But that would take some fancy wall. :)"

Oh my gosh, I remember seeing a 1920s house that had a room off the kitchen with windows that dropped into the wall (in the space below). Those were very neat windows (The house was for sale, and I remember spending quite a bit of time just opening and closing the windows in that room I was so enamored by them). Can't imagine what it would cost to build them today.