Do you have a picture of it?

I think your existing window is well proportioned between the center and side windows. and I wouldn't change that.

One thing I don't like about ours is that because of the sink in front of the window, the person outside can't just reach through the window and place something on a counter on the indoor side of the pass-through. They have to hand it to someone. Ideally, you want a sill-height counter on both sides of the pass-through.

Sash windows for the side windows might be even more practical than casements, since sash windows won't swing out over the patio. Depends on how your patio is laid out. If so, you'd be replacing your windows with ones that look very much like your existing.

Your window is 52x95? That's colossal! I have a large window with the tags still on it (lol). The tag says 68x44, so about the same proportions as yours, but smaller. It has casement openings, in 2 segments. I can guarantee it's not a $5k window: my home is what they call “modest”. It IS a super-high efficiency window (audited by my state), Which is an important aspect of cost.

I keep one screen off, too, so I can have a clear view.

Partim's idea with the fixed glass in the middle seems like a great way to go on a big big window like yours..

The biggest issue with casements is that if they’re on a deck, you’ll be smacking into them when open.

I just clambered up to one of my other windows, since it has a really BIG label still attached. It's made by Kasson and Keller. Vinyl. Triple-paned. Energy Star.

Maybe that company makes a window that will fit your need?

Partim- thanks for the picture. I did plan to put a bar of sorts on the patio side. But I honestly hate the way the window looks in its existing state. I’m not a huge fan of the picture window, but I’m also not a huge fan of a $5k window. I do have two more in the front of my house (the living room opening is much larger) that will eventually be done as well. I wasn’t going to go as crazy with those, but I was hoping to open up the center to the back yard for an unobstructed view. Ultimately I will have to settle with what I can afford. Was hoping I had other options that I didn’t even know about yet.

Tangerinedoor- do you have a picture of ours?
Also, casements were my second choice because of this reason, however the back porch sticks out several feet from the house and the deck would just continue back to touch the house. The deck/patio would be fairly large and it’s kind of in a nook due to the garage protrusion, so the risk of someone walking by and hitting them is less. I’m going to google kasson right now.

Well...you aren't having to match anything else on the back of the home with that layout of the 3-panel set up so I see a few options (all assume there is no structure between the double hungs and the picture windows):

- Go with a 3-Lite slider with either a 25:50:25 split or a 33:33:33 split. The sliding panels on the side will all you more than enough room to pass good sized objects through and easily enough. 25:50:25 would maintain the same look that is there now.

- If you want a really massive opening, you could put a 2 lite slider in there but that would change the look a decent bit

- Install insert tilt and turn flankers and you will have basically the same functionality as the slider option above. They are usually expensive as an operator, but can be found in vinyl and they can be done as an insert here as well.

You picked the most expensive windows Marvin sells to get a price. I don't know why they said the all-fiberglass wouldn't work. I just got a quote for them in casements, custom sized. I would guess you're still going to spend 2 to 3 thousand on this window. Is it worth it?

Here's a picture of my window from the outside. The biggest one. It seems to be open in this photo.

Haha! Clearly my window seems gigantic because my house is petite! Your gigantic window looks tiny on your house!

My MIL had a set-up like that in Florida: sliders above the kitchen counter opening to a screened lanai where a counter had been installed.

It was NEVER used. Everyone went out the adjacent sliding door with dishes. It wasn't worth leaning over the counter to open the window. Finally we had the outside counter removed, which opened up the space.

Your situation may be different, because you have nothing in front of the window. But I would choose the window you like best and not worry about the pass-through function.

Ultimately, for me, I think 2-3k would be more palatable and def something I would consider. The front ones I can do something different when the time comes to replace the remaining windows in the house. A 3 lite glider I believe was roughly 1600-1800 including install.
I didn’t know if they made a 2 lite glider in that size. I assumed it would be wayyy too big.
Can anyone recommend any other brands I should look into?

I don’t recall maker or price but we replaced our dining room window with slider...worth every penny. I would think even just open to pass something out would allow plenty of bug activity, said by a hater of flies and mosquitos! Perhaps being less picky of material on just this one window to fit in your budget?

I’m kinda at that point. My problem is they don’t make a cheaper option in all the ones I’m seeing, but again that was only in Marvin. I’m trying to get other brand options.
I don’t suppose a 2 lite glider would look good with a casement on either side, right? I’m having a hard time picturing it.

IMO a slider replacing the window and the door would be my first choice you get all the glass you want and an entry and exit too.